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Dr. Rajendra Prasad Central Agricultural University, Pusa

In the imperial Gazetteer of India 1878, Pusa was recorded as a government estate of about 1350 acres in Darbhanba. It was acquired by East India Company for running a stud farm to supply better breed of horses mainly for the army. Frequent incidence of glanders disease (swelling of glands), mostly affecting the valuable imported bloodstock made the civil veterinary department to shift the entire stock out of Pusa. A British tobacco concern Beg Sutherland & co. got the estate on lease but it also left in 1897 abandoning the government estate of Pusa. Lord Mayo, The Viceroy and Governor General, had been repeatedly trying to get through his proposal for setting up a directorate general of Agriculture that would take care of the soil and its productivity, formulate newer techniques of cultivation, improve the quality of seeds and livestock and also arrange for imparting agricultural education. The government of India had invited a British expert. Dr. J. A. Voelcker who had submitted as report on the development of Indian agriculture. As a follow-up action, three experts in different fields were appointed for the first time during 1885 to 1895 namely, agricultural chemist (Dr. J. W. Leafer), cryptogamic botanist (Dr. R. A. Butler) and entomologist (Dr. H. Maxwell Lefroy) with headquarters at Dehradun (U.P.) in the forest Research Institute complex. Surprisingly, until now Pusa, which was destined to become the centre of agricultural revolution in the country, was lying as before an abandoned government estate. In 1898. Lord Curzon took over as the viceroy. A widely traveled person and an administrator, he salvaged out the earlier proposal and got London’s approval for the appointment of the inspector General of Agriculture to which the first incumbent Mr. J. Mollison (Dy. Director of Agriculture, Bombay) joined in 1901 with headquarters at Nagpur The then government of Bengal had mooted in 1902 a proposal to the centre for setting up a model cattle farm for improving the dilapidated condition of the livestock at Pusa estate where plenty of land, water and feed would be available, and with Mr. Mollison’s support this was accepted in principle. Around Pusa, there were many British planters and also an indigo research centre Dalsing Sarai (near Pusa). Mr. Mollison’s visits to this mini British kingdom and his strong recommendations. In favour of Pusa as the most ideal place for the Bengal government project obviously caught the attention for the viceroy.

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  • ThesisItemOpen Access
    EFFECT OF ORGANIC BASED NITROGEN MANAGEMENT ON YIELD, NUTRIENT UPTAKE AND SOIL HEALTH UNDER RICE-WHEAT CROPPING SYSTEM IN CALCAREOUS SOIL OF BIHAR
    (Dr.RPCAU, Pusa, 2023) DUDWAL, SURESH KUMAR; Chaudhary, S.K.
    A field investigation was carried out at University Research Farm, Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur), Bihar in randomized block design comprising of twelve treatments T1 (75% RDN), T2 (100% RDN), T3 (125% RDN), T4 (100% RDN + Wheat Straw (WS) @ 3 t/ha + BM), T5 (100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer), T6 (100% RDN + Myco Straw @ 1 t/ha + BM + Biofertilizer), T7 (75% RDN + Wheat Straw (WS) @ 3 t/ha + BM), T8 (75% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM), T9 (75% RDN + Myco Straw @ 1 t/ha + BM + Bio Fertilizer), T10 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha), T11 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha + BM + Bio fertilizer), T12 (Control) and were replicated thrice. The soil of the experimental field was sandy loam in texture having slightly alkaline in reaction (pH 8.43), low in organic carbon (0.42%), low in available nitrogen (242 kg/ha), available phosphorus (9.61 kg/ha) and potassium (76.43 kg/ha). Recommended dose of nitrogen, phosphorous and potassium (120:60:40 kg/ha) were applied through urea, DAP and MOP, respectively, phosphorous and potassium were applied as basal during both the experimental years. Nitrogen was applied 50% as basal and remaining in two equal splits. Rajendra Kasturi and HD 2967 variety of rice and wheat, respectively were used. Among the organic based nitrogen management practices treatment, 100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer (T5) recorded significantly higher value of all the crop growth parameters during both the years which was statistically at par with all the treatments except T12 (Control) of rice. In case of wheat, significantly higher value of growth characters were recorded with application of Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha + BM + Bio fertilizer (T11) which was statistically at par with T10 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha) and T5 (100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer) while remaining significantly superior over rest of the treatments during both the experimental years. Yield attributes and yield of wheat showed superiority with application of (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha + BM +Bio fertilizer (T11) which was statistically at par with T10 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha) and T5 (100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer) while remaining significantly superior over rest of the treatments during both the experimental years. Organics resulted in pronounced impact on yield and yield attributes of rice-wheat cropping system. Application of 100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer (T5) produced higher value of yield attributes and yield during both the experimental years which was statistically at par with T8 (75% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM) and T4 (100% RDN + Wheat Straw (WS) @ 3 t/ha + BM) but significantly higher over rest of the treatments. Among the treatments, application of T3 (125% RDN) recorded significantly higher nutrient content in rice grain and straw which was statistically at par with all the treatment except for T1 (75% RDN) and T12 (Control) during both the years. Application of T5 (100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer) recorded significantly higher nutrient uptake (N, P and K) by grain, straw as well as total, which was statistically at par with almost all the treatments except for T1, T2 and T12, during both the experimental years. In case of wheat, significantly higher nutrient uptake (N, P and K) by grain, straw as well as total uptake were significantly higher under application of Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha + BM +Bio fertilizer (T11) which was statistically at par with T10 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha) and T5 (100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer) while remaining higher over rest of the treatments during both the experimental years. Application of T2 (100% RDN) reported higher net returns and benefit: cost ratio of rice. In case of wheat, significantly higher gross returns, net returns and B:C ratio were calculated under application of T11 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha + BM +Bio fertilizer) which was statistically at par with T10 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha) and T5 (100% RDN + Wheat Straw (WS) @ 3 t/ha + VC (25% N) + BM + Biofertilizer) but it was statistically superior over rest of the treatments during both the experimental years. Among the treatments application of T11 (Wheat Straw (WS) @ 3 t/ha + VC (25% N) + Myco Straw @ 1.5 t/ha + BM + Bio fertilizer) significantly improved physico-chemical properties of soil after completion of rice-wheat cropping system.
  • ThesisItemOpen Access
    Effect of nitrogen management on crop productivity and soil health under rice-wheat cropping system in calcareous soil of Bihar
    (Dr.RPCAU, Pusa, 2023) KISHOR, KAUSHAL; Chaudhary, S.K.
    A field experiment was conducted during kharif and rabi season of 2018-19 and 2019-20 at Research Farm of Dr. Rajendra Prasad Central Agricultural University, Pusa to study the effect of nitrogen management on crop productivity and soil health under rice-wheat cropping system in calcareous soil of Bihar. The soil of the experimental plot was sandy loam in texture, calcareous in nature having pH 8.36, electrical conductivity (0.39 dS/m), bulk density (1.41 g/cc) with low in organic carbon (0.38%), available nitrogen (205.81 kg/ha) and potassium (112.47 kg/ha) and medium in available phosphorous (20.78 kg/ha). The experiment was laid out in factorial randomized block design with three replications. The treatments used in the experimental field included two factors, organic and chemical sources of nitrogen. A total of eight organic nitrogen sources were used viz., M1 - Control, M2 - Mycostraw @ 50% RDN, M3 - Mycostraw @ 75% RDN, M4 - Mycostraw @ 50% RDN + 25% RDN through vermicompost, M5 - Mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure, M6 - Mycostraw @ 50% RDN + green manure, M7 - Mycostraw @ 75% RDN + green manure and M8 - Mycostraw @ 75% RDN + microbial consortium (Azospirillum + PSB) while three chemical nitrogen sources were used as N1 - 50% RDN, N2 - 75% RDN and N3 - 100% RDN. Dhaincha was used for green manure. 75% RDF was used in the wheat crop. Application of mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure treatment recorded significantly higher plant height, number of tillers/m2, leaf area index (5.37) and SPAD value (39.60) of rice which was statistically at par with treatment mycostraw @ 75% RDN + green manure and mycostraw @ 50% RDN + green manure. Among chemical fertilizer treatments, 100% RDN recorded significantly higher plant height, number of tillers/m2, leaf area index (4.87) and SPAD value (39.89) at all growth stages of rice. Dry matter accumulation, length of panicle (24.34 cm), number of grains/panicle (101.05), grain yield (54.35 q/ha) and straw yield (68.75 q/ha) in rice were recorded significantly higher value in treatment receiving mycostraw @ 50% RDN + green manure over rest of the treatments but was statistically at par with mycostraw @ 75% RDN + green manure and mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure. Among chemical fertilizer, 100% RDN showed significantly higher length of panicle (24.00 cm), number of grains/panicle (99.58), grain yield (47.04 q/ha) and straw yield (59.67 q/ha) of rice over 50% RDN but was statistically at par with 75% RDN. Significantly higher plant height, number of tillers/m2, dry matter production at different growth stages and number of spikes/m2 (320.57), length of spike (10.92 cm), number of spikelets/spike (24.88), grain yield (36.06 q/ha) and straw yield (43.53 q/ha) were recorded in treatment with mycostraw @ 75% RDN + green manure in wheat but was statistically at par with treatment mycostraw @ 50% RDN + green manure, mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure, mycostraw @ 50% RDN + 25% RDN through vermicompost and mycostraw @ 75% RDN + microbial consortium with Azospirillum and PSB. Chemical fertilizer treatments did not produce any significant effect on all these growth, yield attributes and yield at different growth stages of wheat. Maximum rice equivalent yield (103.23 q/ha) and gross returns (₹ 1,86,347/ha) were recorded in treatment with mycostraw @ 50% RDN + green manure which was significantly surpassed all other treatments. But it was statistically equivalent with mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure and mycostraw @ 75% RDN + green manure. Under chemical fertilizer treatments, maximum rice equivalent yield (92.93 q/ha) and gross returns (₹ 1,63,024/ha) were found in 75% RDN treatment and was statistically at par with 50% RDN. Net return was significantly maximum in mycostraw @ 50% RDN + green manure (₹ 1,13,424/ha) over rest of the treatments. Among chemical fertilizer, 75% RDN recorded significantly higher net returns (₹ 94,978/ha) over other treatments. Among the various organic manure treatments, mycostraw @ 50% RDN + green manure recorded significantly higher N, P & K uptake by rice as compared to other treatment but was statistically equivalent with mycostraw @ 75% RDN + green manure, mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure. In case of wheat, mycostraw @ 75% RDN + green manure recorded significantly higher N, P & K uptake by wheat and was statistically at par with mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure and mycostraw @ 50% RDN + green manure. Under chemical fertilizer treatments, N, P & K uptake by rice was significantly higher in the treatment receiving 100% RDN but was statistically at par with 75% RDN. In case of wheat, N, P & K uptake was not significantly influenced. Soil pH, electrical conductivity and micronutrients could not reach the level of significance due to both the factors (organic manure and chemical fertilizer). Mycostraw @ 75% RDN + green manure plots recorded significantly higher value of water holding capacity (31.39%), water stable aggregates (50.94%) but recorded lower bulk density (1.365 g/cc) as compared to other organic treatments but was statistically at par with treatment mycostraw @ 50% RDN + green manure and mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure. Water holding capacity, water stable aggregates and bulk density were not significantly influenced by chemical fertilizer treatment. Available N, P2O5 and K2O in post-harvest soil were significantly higher in mycostraw @ 75% RDN + green manure as compared to other organic manure treatments while in chemical treatments, it did not show any significant effect on available N, P2O5 and K2O. The soil of mycostraw @ 75% RDN + green manure plots recorded significantly higher value of soil microbial biomass carbon (289.55 mg/kg soil), bacterial population (5.06 x107 CFU/g soil), fungal population (4.16 x 104 CFU/g soil) and actinomycetes population (2.57 x 107 CFU/g soil) as compared to other organic treatments but was statistically at par with treatment mycostraw @ 50% RDN + green manure and mycostraw @ 50% RDN + 25% RDN through vermicompost + green manure. Microbial population and soil microbial biomass carbon were not significantly affected with application of chemical fertilizers.
  • ThesisItemOpen Access
    Effect of boron and molybdenum under different tillage and irrigation practices on growth and yield of chickpea in Sesbania- chickpea - sesame cropping system under riverine (Diara) area
    (Dr.RPCAU, Pusa, 2022) PAZHANISAMY, S.; Singh, Devendra
    The present investigation was conducted at the Bairiya dhab research farm of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar, India, for two successive winter (rabi) seasons of 2019-2020 and 2020-2021 to study the effect of boron and molybdenum under different tillage and irrigation practices on growth and yield of chickpea in Sesbania- chickpea - sesame cropping system under riverine (Diara) area. The experiment was laid out in split- split plot design and replicated thrice. The treatments consisted of two different tillage practices, viz. conventional tillage and conservation tillage, allocated in the main plot with two irrigation methods, viz. conventional irrigation and sprinkler irrigation, allocated in the subplot and six methods of micronutrient application, viz. boron basal (1 kg/ha), boron foliar (0.25%), molybdenum seed treatment (1g/kg of seed), molybdenum foliar (333g/ha), boron basal (1 kg/ha) + molybdenum seed treatment (1g/ kg of seed) and boron basal (1 kg/ha) + molybdenum foliar (333g/ha) allocated in sub-sub plot. The basal dose of boron was applied at the sowing, the seed treatment of molybdenum was done three days before sowing, and foliar spray was given at 50 DAS. The chickpea variety of Sabour Chana-1 was taken as a test variety for the experiment. Applied N (urea), P (SSP) K (MOP) as basal dressing in every treatment equally. The crop was sown in rows at 30 cm spacing with seed rate 80 kg/ha. The irrigation was given before flowering as per the treatments of the study, and weed management has done with help of herbicides and wheel hoes. The soil of the experimental plot was sandy loam in texture with alkaline pH, normal EC, medium in organic carbon (0.69%), low in available nitrogen, medium in phosphorus, low in potassium, high in Fe, Mn, and Cu, low in Zn and boron and medium in molybdenum. The data on various growth attributes, physiological indices, yield attributes, nutrient availability in the soil, nutrient uptake of the crop, economics, direct weather parameters and indirect weather parameters were collected and analysed with the recommended tool. Conventional tillage practice significantly enhanced plant height, the no. of branches, dry matter production (DMP), root nodules, root length, root dry weight plant population, CGR, RGR, NAR and chlorophyll content (SPAD value) and yield attributes, viz., days to flowering, the number of seeds plant-1, seeds pod-1 and seed index (100-seed weight) than the conservation tillage practices. The result indicated that conventional tillage produced a greatly higher grain yield (1531.9 and 1688.8), stover yield (2475.8 and 2575.3) and harvest index (38.1 and 38.4) than the conservation tillage during both consecutive years. Likewise, crop uptake of NPK, gross return (87,058 and 93,874), net return (50,229 and 52,562), and B: C ratio (1.36 and 1.27) was also pointedly more in conventional tillage practices than the conservation tillage practices. Higher infiltration rates and lower bulk densities and higher boron and copper were recorded in conventional tillage. In contrast, soil moisture content, water holding capacity, porosity, SOC (soil organic carbon), available N, P, K and Zn were greatly higher in the conservation tillage in the cropping season of 2019-20 and 2020-21. Method of sprinkler irrigation recorded the maximum plant height, no. of branches, dry matter production (DMP), root nodules, root length, root dry weight, plant population stand, CGR, RGR, NAR and chlorophyll content (SPAD value) days to flowering, no. of seeds plant-1, seeds pod-1 and seed index (100- seed weight), grain yield (1487.3 and 1652.0), stover yield (2439.6 and 2556.3) and harvest index (37.7 and 38.0), crop uptake of NPK (stover and grain), total gross return (84,704 and 91,933), net return (49,319 and 53,201), B: C ratio (1.39 and 1.37) which was significantly surpassed over conventional irrigation. Regarding the soil properties, sprinkler irrigation recorded a higher infiltration rate, lower soil moisture content, higher EC, and higher available nitrogen in the cropping season of 2019-20 and 2020-21. With respect to micronutrient application methods, boron basal + molybdenum seed treatment recorded significantly higher plant height, no. of branches, dry matter production (DMP), root nodules, root length, root dry weight plant population, CGR, RGR, NAR and chlorophyll content (SPAD value) days to flowering, days to maturity, number of seeds plant-1, seeds pod-1 and seed index (100- seed weight), grain yield (1652.2 and 1826.0), stover yield (2499.9 and 2617.1) and harvest index (39.7 and 40.2), NPK uptake by crop, gross return (93,045 and 1,01,114), net return (57,137 and 61,717), B: C ratio (1.59 and 1.57) and it was at par with boron basal + molybdenum foliar. Micronutrient application methods showed no variation in soil physical, chemical and biological properties except boron and rhizobium colonies during two experimental years. The interaction between tillage practices, irrigation methods and methods of micronutrient application turned out to be significant in grain yield. Combined practices of sprinkler irrigation with boron basal + molybdenum seed treatment application under conventional tillage produced the highest grain yield (1901.7 and 2114.4) significantly among the interaction of micronutrient application method, irrigation methods and tillage practices, which was followed by a combination of boron basal + molybdenum foliar in sprinkler irrigation under conventional tillage practice (1778.5 and 1979.5). However, the application of boron as a foliar method in conventional irrigation under conservation tillage practice produced the lowest grain yield (1148.8 and 1235.1) significantly among the other combination of treatment in the first year.
  • ThesisItemOpen Access
    Integrated nutrient management under Potato + Maize intercropping system in north Bihar condition
    (Dr.RPCAU, Pusa, 2022) SINGH, MAYANGLAMBAM BISHONATH; DWIVEDI, D.K.
    A field experiment was carried out during the rabi seasons of 20l9-20 and 2020-21 on potato + maize intercropping system to assess the impact of different integrated nutrient management at Research Farm of Tirhut college of Agriculture, Dholi, Muzaffarpur, Bihar. The treatment combination were- T1 (RDF for sole potato), T2 (RDF for sole maize), T3 (control potato + maize, no fertilizer and FYM), T4 (RDF for potato + RDF for maize), T5 (RDF for potato + 50% RDF for maize + 10 t FYM ha-1), T6 (RDF for potato + 50% RDF for maize + 20 t FYM ha-1), T7 (RDF for potato + 75% RDF for maize + 10 t FYM ha-1), T8 (RDF for potato + 75% RDF for maize + 20 t FYM ha-1), T9 (RDF for potato + 100% RDF for maize + 10 t FYM ha-1), T10 (RDF for potato + 100% RDF for maize + 20 t FYM ha-1), T11 (RDF for potato + 125% RDF for maize + 10 t FYM ha-1), T12 (RDF for potato + 125% RDF for maize + 20 t FYM ha-1), T13 (125% RDF for potato +125% RDF for maize + 10 t FYM ha-1) and T14 (125% RDF for potato +125% RDF for maize + 20 t FYM ha-1). The varieties used for the experiment are Kufri Ashoka (potato) and Shaktiman-5 (maize). The RDF of potato and maize were 150:90:100 and 150:75:50 kg ha-1 (NPK) kg per ha. The spacing was maintained at 60 cm x 20 cm for both the crops. Maize was sown on the side of the ridges 7 days after planting of potato. The population of both the crops was maintained at 100 %. The experiment was laid out in randomized block design (RBD) replicated thrice. The experimental site was sandy loam in texture, low in organic carbon (0.36 %), slightly alkaline with pH-8.21, low in available nitrogen (226.78 kg ha-1) and available phosphorus (21.25 kg ha-1), while medium in available potassium (142.42 kg ha-1). The growth attributes including height of plant, shoots per plant, number of leaves per plant, leaf area index (LAI), dry matter accumulation, yield attributes such as number of tubers per plant, weight of tubers per plant, length of cob, number of grain per cobs, etc. and yield of both crops (potato and maize) were significantly impacted by the different levels of INM. For potato, during 2019-20 and 2020-21, the treatment T14 - 125% RDF of potato + 125% RDF of maize + 20 t FYM ha-1 gave maximum plant height (44.31 and 43.09 cm), shoots per plant (6.07 and 6.00), leaves per plant (41.47 and 42.13), LAI (3.85 and 3.44), dry matter accumulation (69.60 and 72.88 g plant-1), bulking rate of tubers (8.72 and 8.65 g plant-1 day-1), tuber yield (266.23 and 263.98 q ha-1), total uptake of N (97.02 and 97.33 kg ha-1), P (39.62 and 40.77 kg ha-1) and K (132.57 and 132.56 kg ha-1). It was at par with T10 (RDF for potato + 100% RDF for maize + 20 t FYM ha-1), T12 (RDF for potato + 125% RDF for maize + 20 t FYM ha-1) and T13 (125% RDF for potato +125% RDF for maize + 10 t FYM ha-1). Same pattern was observed in case of maize where T14 gave significantly maximum plant height (245.20 and 240.49 cm), leaves per plant (11.27 and 11.13), LAI (4.36 and 4.58), dry matter accumulation (214.04 and 212.75 g plant-1), length of cob (20.67and 20.33 cm), girth of cob (15.33 and 15.18 cm), number of grains cob-1 (386.23 and 371.93), weight of grains cob-1(99.48 and 95.84 g cob-1), grain yield (92.33and 90.41 q ha-1), total uptake of N (174.74 and 172.44 kg ha-1), P (51.70 and 53.88 kg ha-1) and K (113.47 and 114.13 kg ha-1). Under intercropping system, T14 (125% RDF for potato +125% RDF for maize + 20 t FYM ha-1) significantly higher potato equivalent yield (381.64 and 377.00 q ha-1), gross return (4,29,905 and 4,20,884 ₹ ha-1), net return (2,81,204 and 2,43,333 ₹ ha-1) but higher B:C was achieved from T2: RDF for sole maize (3.29) during 2019-20, while in 2020-21, same was observed from T1: RDF for sole potato (2.70). T14 also recorded significantly higher residual available nitrogen (287.06 and 278.97 kg per ha), phosphorus (41.25 and 46.87 kg per ha) and potassium (173.21 and 175.44 kg per ha) in soil after harvesting of the crops. The land equivalent ratio was also higher under T14 during both the years (2.19 and 2.21), while being at par with T10, T12 and T13. These four treatments (T10, T12, T13 and T14) while being at par with each other, were significantly superior over other treatments in all respect.
  • ThesisItemOpen Access
    Yield maximization through agronomic management in mungbean (Vigna radiata L.) under rice based cropping system
    (Dr.RPCAU, Pusa, 2022) Singh, Ankit; Singh, Harendra
    A field experiment was carried out during the two consecutive Zaid and Kharif seasons in the years 2020–2021 and 2021–2022 at the research farm of Tirhut College of Agriculture, Dholi, Muzaffarpur (Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar) to study "Yield maximization through agronomic management in mungbean (Vigna radiata L.) under rice based cropping system’’. The experiment was laid out in a factorial randomized block design with three replications having different factors like:-Seed inoculation with Rhizobium + PSB (Local) and LSMR 1 (Stenotrophomonas maltophilia) + RB 3 (Microbial consortia), weed management: weedy check, two-hand weeding at 20 and 40 DAS, propaquizafop 2.50% + imazethapyr 3.75% ME @ 125g/ha and fomesafen @ 220 g/ha + fluzifop-p-butyl @ 220 g/ha at 18 DAS, and foliar nutrition: water spray, urea spray 2% and 19:19:19 NPK at 2% at Flower initiation and Pod initiation. All treatments were compared with absolute control. This study revealed that when the seed was inoculated with LSMR 1 (Stenotrophomonas maltophilia) + RB 3 (Microbial consortia) in the green gram rice based cropping system and then foliar application with 2% 19:19:19 NPK (Flower initiation + Pod initiation) on the growth and yield of mungbean, the highest grain yield was found among all other treatments. Nevertheless, in terms of foliar nutrition, the 2% urea spray (Flower induction and pod induction) was found to be equal to the 2% 19:19:19 NPK (Flower induction and pod induction). As for the yield attributes and the availability of N.P. and K in soil, they followed the same pattern as the grain yield in both the years (2020 and 2021) and in the pooled data as well. In a green gram rice based cropping system, weed management done by two-hand weeding at 20 and 40 days after sowing and on the growth of mungbean notably resulted in the highest grain yield and minimum weed dynamics compared with all other experimental combinations. At the same time, propaquizafop 2.50% + imazethapyr 3.75% ME at 125g/ha at 18 DAS showed a similar response to two-hand weeding at 20 and 40 DAS in both the years (2020 and 2021), and on pooled data respectively. The yield attributes and availability of N.P and K followed the same pattern as that of grain yield in each year (2020 and 2021) and pooled data, respectively. However, the result of seed inoculation with LSMR 1 (Stenotrophomonas maltophilia) plus RB 3 (Microbial consortia), as well as two hand weeding at 20 and 40 days after seeding, the residual effect of mungbean on rice crop growth and yield were found to be significantly higher. In terms of foliar nutrition, it was found that there was no significant difference between the treatments in both the years (2020 and 2021) as well as pooled data. LSMR 1 (Stenotrophomonas maltophilia) + RB 3 (Microbial consortia) as seed inoculant followed by propaquizafop 2.50% + imazethapyr 3.75% ME @ 125g/ha at 18 DAS and foliar spray of 2% 19:19:19 NPK at flower initiation + Pod initiation were recorded as the most profitable in terms of net return and B: C ratio with the mungbean crop. In case of rice, significantly higher net return and B: C ratio were recorded in two hand weeding at 20 and 40 DAS, followed by LSMR 1 (Stenotrophomonas maltophilia) + RB 3 (Microbial consortia) and 2% 19:19:19 NPK at (Flower initiation + Pod initiation) in each year (2020 and 2021) and pooled data respectively.
  • ThesisItemOpen Access
    EFFECT OF ORGANIC WEED MANAGEMENT ON WEED DYNAMICS AND NUTRIENT STATUS OF RICE-MAIZE CROPPING SYSTEM UNDER CONSERVATION AGRICULTURE
    (Dr.RPCAU, Pusa, 2021) SAHOO, SUBHRA; Roy, D. K.
    Conservation agriculture (CA)-based rice (Oryza sativa L.) - maize (Zea mays L.) cropping system (RMCS) can be the possible option for higher productivity and sustainability of the RMCS in the fertile IGP belt of India. Weed infestation being the major cause of worry is the most potential constraint towards the adoption of CA practices. Weed dynamics and competition is largely influenced by tillage practices. In this scenario, it is necessary to have an environment-friendly holistic approach towards the management of such dynamic weeds. Thus, as an alternative, the integration of CA-based tillage practices with methods of organic weed management was explored with a view of enhancing the viability and sustainability of RMCS. A field experiment was carried out at South Panghabri plots of Crop Research Centre, Dr. Rajendra Prasad Central Agricultural University, Pusa (25.58, 51 °N, 85.4°, 313E), during 2019-20 and 2020-21. This experiment was designed in a split-plot design with four main plot tillage treatments and five sub-plot organic weed management treatments, Four tillage practices considered were Zero-till direct-seeded rice followed by Zero-till maize [ZTDSR fb. ZTDSM], Rice followed by maize both on permanent raised beds with residue [PBDSR+R fb. PBDSM+R], PBDSR followed by maize on permanent beds without residue [PBDSR-R fb. PBDSM-R] and Conventional tilled puddled transplanted rice followed by conventional tilled maize [CTR fb. CTM]. The five organic weed management treatments applied were unweeded control, Vermicompost mulch @ 5 t/ha, Phosphorus enriched Vermicompost mulch @ 5 t/ha, Live mulch (Sesbania spp. @ 40 kg/ha in Rice crop and Pisum sativum @ 100 kg/ha in Maize crop) and Weed-free (Hand weeding at 20, 40 and 60 DAS). The objective of the experiment was to evaluate the best weed management option on basis of weed dynamics and competition, system productivity, nutrient status and economics with the integration of CA-based tillage practices and organic weed management methods. The findings of the present study clearly visualized that minimum weed population, weed dry weight and maximum weed control efficiency were observed in bed planting of both rice and maize with residue retention over the conventional control. In, case of weed management treatments, weed-free effectively managed the weeds by 73-83 % over un-weeded control. However, live mulch was also considered effective (63-69%). As regards to system perspective of rice - maize cropping system, tillage and weed management practices showed significant responses in system productivity. Bed planting with residue retention increased the system productivity by 15-17 % over the conventional system. Among the weed management practices, weed-free treatment obtained the highest system productivity (162.2 q/ha in 2019-20 and 168.9 q/ha in 2020-21). However, it was at par with live mulch treatment (158.1 q/ha in 2019-20 and 162.8 q/ha in 2020-21). Both tillage and weed management practices had a pronounced effect on soil nutrient status, soil physico-chemical and biological properties. Residue retention on permanent bed planting significantly increased the available nutrient content in soil by influencing the soil physico-chemical and biological parameters (Soil microbial biomass carbon, DHA, Soil respiration) substantially. In the case of weed management treatments, Mulching with P- enriched vermicompost had improved the soil nutrient status, attributing to the better physical and biological condition of the soil. The findings indicated an advantage of reduced production cost (mainly tillage operations) and higher crop produce in residue retained bed planting system in form of higher net returns and B: C ratio. However, amongst different weed management practices, the highest gross returns were obtained in weed-free attributing to higher yield but, live mulch treatment was statistically at par with the weed-free. Net returns and B: C ratio were higher in Live mulch treatment due to the lower cost of cultivation. Considering the findings from the research, it is apparent that alternative CA-based residue retained tillage practices with the application of Live mulch can be a potential strategy to improve, productivity, profitability and sustainability of RMCS in IGP.
  • ThesisItemOpen Access
    Effect of crop establishment methods, nutrient and weed management on hybrid rice (Oryza sativa L.)
    (DRPCAU, Pusa, Samastipur, 2019) Singh, Abhinandan; Pandey, I.B.
    A field experiment was carried out during two consecutive kharif seasons of 2017 and 2018 at research farm of Tirhut College of Agriculture, Dholi a campus of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar to study the effect of crop establishment methods and nutrient levels on hybrid rice (Oryza sativa L.) under different weed management practices. The experiment was laid out in split-plot design and replicated thrice. The treatments consisted of three crop establishment methods viz. puddled transplanting, unpuddled transplanting and dry direct seeded rice and three nutrient levels viz. 75% RDF (recommended dose of fertilizer), 100% RDF (120:60:40 kg NPK/ha) and 125% RDF were kept in main plot and four weed management practices viz. weedy check, hand weeding twice (20 and 40 DAS/T), bispyribac-sodium 20 g/ha + pyrozosulfuron 20 g/ha at 20 DAS/T, and brown manuring in sub plot. All the treatments received recommended dose of phosphorus and potassium as basal dressing. Nitrogen was applied in three splits i.e. 1/2nd as basal, 1/3rd at the active tillering stage and rest 1/3rd at panicle initiation stage. The crop was sown in rows 20 cm apart using the seed rate of 15 kg/ha for transplanted rice and 25 kg/ha for dry direct seeded rice. The soil of the experimentation plot was sandy loam in texture and low in OC, available Nitrogen, Potassium and medium Phosphorus. The data on various growth characters, yield attributes, nutrient uptake weed dynamics, weed control efficiency and economics were collected and analyzed. Puddled transplanting significantly enhanced plant height, dry matter production, crop growth rate, leaf area index, root volume and root dry weight were recorded when crop was sown with puddled transplanting than unpuddled transpalnting and dry direct seeded rice. However, maximum root length was recorded in dry direct seeded rice which was significantly higher over unpuddled and puddled transplanting. Similarly, puddled transplanting also produced maximum number of tillers/m2, number of panicles/m2, panicle length, number of grain/panicle, number of filled grain/panicle and test weight which was significantly higher over unpuddled transplanting and dry direct seeded rice. The result indicated that puddled transplanting produced significantly higher grain yield (56.71 and 58.47 q/ha), straw yield (80.10 and 81.24 q/ha), harvest index (41.43 and 41.80) and grain: straw ratio (0.708 and 0.719) than unpuddled transplanting and dry direct seeded rice.
  • ThesisItemOpen Access
    Effect of summer legumes on growth and yield of succeeding direct-seeded rice (Oryza sativa L.) under different nitrogen levels
    (Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, 2018) Choubey, Anup Kumar; Sinha, K. K.
    A field experiment was carried out during the two consecutive kharif season of 2014 and 2015 at research farm of Tirhut College of Agriculture, Dholi of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar to study the effect of summer legumes on growth and yield of succeeding direct-seeded rice (Oryza sativa L.) under different nitrogen levels. The experiment was laid out in split-plot design and replicated thrice. The treatments consisted of three summer legumes viz. dhaincha, mungbean, urdbean and summer fallow was kept in main plot and four nitrogen levels viz. 0% RDN (recommended dose of nitrogen), 50% RDN, 100% RDN and 150% RDN in sub-plot. All the treatments received an uniform application of 60 kg P2O5, 40 kg K2O and 25 kg ZnSO4 per hectare as basal dressing. Nitrogen was applied in three equal splits i.e. 1/3rd as basal, 1/3rd at the active tillering stage and rest 1/3rd at panicle initiation stage. The crop was sown in rows 20 cm apart using the seed rate of 30 kg/ha. The soil of the experimentation plot was sandy loam in texture and low in OC, available Nitrogen, Potassium and medium Phosphorus. Rice crop sown after incorporation of summer legumes significantly influenced the growth, yield attributes and yield during both the years. Significantly higher plant height (85.15 & 86.03 cm), number of tillers (291.25 and 302.50 m-2), dry matter production (872.19 and 891.36 g m-2) and leaf area index (4.00 and 4.14) were recorded when crop was sown after incorporation of dhaincha than summer fallow. Rice crop was sown after incorporation of dhaincha recorded maximum number of panicles (275.00 and 285.12 m-2), panicle length, number of spikelets/panicle, number of fertile spikelets/panicle being at par with preceding mungbean and both recorded significantly higher value over summer fallow. The crop sown after incorporation of dhaincha produced significantly higher grain yield (38.74 & 39.59 q ha-1) than mungbean, urdbean and summer fallow. Nutrient uptake, net return (`32813 & 38960 ha-1) and B: C ratio (1.10 & 1.36) of rice were also highest in dhaincha incorporated plot which was significantly higher over mungbean, urdbean and summer fallow. Similarly, incorporation of mungbean and urdbean statistically at par in respect to yield indices, grain yield, net return and B: C ratio and both recorded significantly higher values than summer fallow. Application of 100% RDN in dhaincha incorporated plot recorded significantly higher grain yield, net return and B: C ratio than the application of 150% RDN in rice followed by urdbean and summer fallow. Application of 150 per cent recommended dose of nitrogen registered maximum plant height (87.90 and 88.88 cm), number of tillers (309.58 and 318.33 m-2), dry matter production (877.78 and 896.95 g m-2) and leaf area index (4.20 and 4.37) which was statistically at par with 100% RDN and booth significantly scored over 50% RDN and control. The maximum yield attributing parameters, grain yield (40.07 & 41.46 q ha-1), net return (` 34259 & 39880 ha-1) and B: C ratio (1.12 & 1.35) were also recorded at 150% RDN which was found at par with 100% RDN and both significantly scored over lower levels of nitrogen. The N, P and K uptake by rice increased significantly with increasing levels of nitrogen and recorded significantly higher uptake at 150% RDN than lower levels of nitrogen.
  • ThesisItemOpen Access
    Integrated nutrient and weed management on growth, yield and quality of aromatic rice (Oryza sativa L.)
    (Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, 2018) Kumari, Pooja; Roy, D. K.
    A field experiment entitled “Integrated nutrient and weed management on growth, yield and quality of aromatic rice (Oryza sativa L.)” was carried out at Crop Research Centre of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar (India) during kharif seasons of 2016 and 2017 to evaluate the effect of integrated nutrient and weed management practices on growth, yield, weed dynamics, quality and economics of aromatic rice. The soil of the experimental field was clay loam with alkaline reaction, normal EC, low organic carbon, available Nitrogen, Phosphorus, and Potassium. The experiment was carried out in split plot design with three replications. The two factors under study comprised of integrated nutrient management in Main plots i.e. N0-Control, N1-50% RDN through inorganic source + 50% RDN through vermicompost, N2-75% RDN through inorganic source + 25% RDN through vermicompost and N3-100% RDN through inorganic source and integrated weed management in Sub-plots consists of W1 – Pretilachlor 1.5 kg/ha (P.E.) + Bispyribac sodium 20 g/ha at 20 DAT, W2 – Pretilachlor 1.5 kg/ha (P.E.) + 1 HW at 20 DAT, W3 - Weed free (2 HW at 20 & 40 DAT) and W4-Weedy check. The rice variety used was Rajendra Bhagawati and recommended fertilizer dose was 120-60-40 kg/ha N-P-K, respectively. Other crop management practices were performed as per standard package of practices. Growth parameters viz. plant height, number of tillers, dry matter production and crop growth rate were recorded at different crop growth stages. Likewise, yield and yield attributes (number of panicles/m2, panicle length, No. of grains /panicle, test weight, grain yield, straw yield and harvest index) were recorded at harvest. Weed parameters (weed population/m2, weed dry weight, weed control efficiency and weed index), physico- chemical properties (initial and post-harvest Soil pH, EC, organic carbon, available N, P and K in soil, N, P, K and Zn content and uptake by crop and weeds), various qualitative indices viz. protein content, hulling %, milling %, head rice recovery, kernel length, kernel breadth and shape index before and after cooking, kernel elongation ratio, kernel elongation index, volume elongation ratio and economics (cost of cultivation, gross returns, net returns and Benefit-Cost ratio) were also worked out. The data on various aspects in this study on response of rice to different integrated nutrient and weed management practices were analyzed through standard statistical methods and logical conclusions were drawn. Among different nutrient and weed management practices, higher growth parameters, yield attributes, yield, nutrient uptake by crop and lowest weed parameters except weed control efficiencywere found in 50 % RDN through inorganic + 50% RDN through vermicompost in integrated nutrient management and weed free (2 HW at 20 & 40 DAT) under integrated weed management practices . No significant variation was observed with different nutrient and weed management practices in case of crop growth rate at harvest, length of panicle, test weight, harvest index, nutrient content in crop & weeds and quality parameters of crop during both the years of study and in pooled mean. The highest gross returns was found in 50% RDN through inorganic source + 50% RDN through vermicompost in integrated nutrient management and in weed free (2 HW at 20 & 40 DAT) under integrated weed management practices. However, the highest net returns and B: C ratio was found in 100% RDN through inorganic source which was statistically at par with 75 % RDN through inorganic source + 25 % RDN through vermicompost only and was found significantly superior over 50% RDN through inorganic source + 50% RDN through vermicompost and control in integrated nutrient management and under integrated weed management practices,the highest net returns and B: C ratio was found inPretilachlor 1.5 kg/ha (P.E.) + Bispyribac sodium 20 g/ha at 20 DAT which was statistically at par withPretilachlor 1.5 kg/ha (P.E.) + 1 HW at 20 DAT and weed free (2 HW at 20 & 40 DAT).