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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 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
    IMPACT OF DRIP FERTIGATION ON YIELD, WATER AND NUTRIENT USE EFFICIENCY OF RABI MAIZE (Zea mays L.)
    (Dr.RPCAU, Pusa, 2022) TAK, OMPRKASH; KUMAR, MUKESH
    The present investigation entitled “Impact of drip fertigation on yield, water and nutrient use efficiency of Rabi Maize (Zea mays L.)” was studied in Rabi 2021- 22 in the pusa farm of Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur) Bihar to find out effect of irrigation methods and nitrogen application rate on enhancing productivity, water and nitrogen use efficiency of rabi maize. The trial was laid out in split plot design had four irrigation methods in main plot consist viz., I1- Ridge and furrow (farmers’ practices), I2- 50% ETc through drip irrigation, I3- 75% ETc through drip irrigation, I4- 100% ETc through drip irrigation and four sub-plot treatments viz., F0- Control (0:75:50::N: P2O5:K2O), F1- 50% RDF (90:75:50:: N: P2O5:K2O), F2- 75% RDF (135:75:50:: N: P2O5:K2O), F3-180: 75:50:: N: P2O5:K2O) with three replication . Drip irrigation with 100% ETc of water recorded the higher maize height, dry matter production, crop growth rate, leaf area index compared to Ridge and furrow (farmers’ practices). Among N application rate option, use of 180:75: 50:: N: P2O5:K2O had significantly higher maize height, dry matter production, crop growth rate and leaf area index. The yield of rabi maize (11.80 t/ha), biological yield (24.90 t/ha) were also higher in 100% ETc through drip irrigation and with use of N: P2O5:K2O @ 180:75:50 kg/ha. Consequently, water use efficiency (kg/ha-mm), in comparison of irrigation methods and fertilizer application rates, we found 50% ETc using through drip irrigation with 180 kg N/ha fertiliser dose (I2F3) had shown significantly superior water use efficiency (56.12 kg/ha-mm). Drip irrigation using 50% ETc of water with 180 kg N/ha treatments (I2F3) had the highest water productivity (66.45 ₹/m3) in a comparison of fertiliser application rates at the same or different levels of irrigation methods, which was comparable to drip irrigation using 75% ETc of water with 180 kg N/ha treatments (I3F3) (63.04 ₹/m3). I3F3 was at par with 100% ETc of water supplied with drip irrigation with combination of N doses of 180 kg/ha (I4F3) (55.68 ₹/m3), 100% ETc of water supplied with drip irrigation with combination of N doses of 135 kg/ha (I4F2) (53.44 ₹/m3) and 50% ETc of water supplied with drip irrigation with combination of N doses of 135 kg/ha I2F2 (53.42 ₹/m3). Drip irrigation with 100% ETc of water with combination of N doses of 180 kg/ha (I4F3) had the highest cost of cultivation (₹ 76053/ha), gross return (₹ 240315/ha) and net return (₹ 164262/ha). whereas the benefit cost ratio (2.27) was the highest in ridge and furrow (farmers’ practices) applied with 180 kg N/ha treatments (I1F3) that was at par with 100% ETc of water supplied through drip irrigation with combination of N doses of 180 kg/ha (I4F3) (2.16) and 100% ETc of water supplied through drip irrigation with combination of N doses of 135 kg/ha (I4F2) (2.13). From the present study it may be concluded that drip irrigation using 100% ETc of water with suitable N: P2O5:K2O dosages at the rate of 180:75:50 kg/ha was higher, grain yield, stover yield, biological yield, net return and gross return of rabi maize. While B: C ratio was higher in ridge and furrow (farmers’ practices) applied with 180 kg N/ha combination of treatments. Water use efficiency was significantly higher in drip irrigation using 50% ETc of water applied with 180 kg N/ha treatments but nitrogen use efficiency was significantly superior in 100% ETc of water supplied through drip irrigation with combination of N dosages of 90 kg/ha.
  • ThesisItemOpen Access
    PERFORMANCE EVALUATION OF NANO UREA BASED NITROGEN MANAGEMENT FOR MAXIMIZING WHEAT PRODUCTIVITY UNDER RESTRICTED IRRIGATION
    (Dr.RPCAU, Pusa, 2022) KUMARI, QUARI; SAPNA, KUMARI
    At the RPCAU Pusa farm, Samastipur (Bihar), an experiment was done in the year 2021-2022, with the goal of evaluating the "Performance evaluation of nano urea based nitrogen management for maximizing wheat productivity under restricted irrigation." The major goal of this work was to create a technology for employing nano urea under these circumstances to increase wheat productivity. The experiment was designed using an RBD with three replications and eleven treatments. The test farm's soil was a sandy loam with 0.47% organic carbon and a pH of 8.28. The soil contains 110 kg ha-l of K2O, 17.18 kg ha-l of P2O5, and 221 kg ha-l of readily available N. The growth and yield traits are significantly impacted by various treatments. Two nano urea sprays at tillering and jointing under RDN+ resulted in increased plant height and more tillers. The results of the study demonstrated that higher dry matter production and crop growth rate were seen under RDN+ with two sprays of nano urea at tillering and jointing. Under the RDN+ two sprays of nano urea at tillering and jointing, plant height, the density of tillers per square metre, and the accumulation of dry matter all increased. Higher numbers of ear head/ m2, length of ear head, test weight and number of grains/ ear head were seen from RDN+one spray of nano urea at tillering. The highest harvest index (HI) was reported from RDN+ two sprays of nano urea at tillering and jointing, but higher grain yield and straw were recorded from RDN+ one spray of nano urea at tillering. Higher gross returns, net returns, and B: C ratios were achieved in RDN+one spray of nano urea during tillering.
  • ThesisItemOpen Access
    PERFORMANCE OF FORAGE PEARLMILLET UNDER NITROGEN AND CUTTING MANAGEMENT
    (Dr.RPCAU, Pusa, 2022) GUPTA, PRIYANKA; DHARMINDER
    A field experiment was carried in the Kharif season of year 2020-2021 at Pusa Farm, Dr. R.P.C.A.U. Pusa, Samastipur, Bihar, to investigate the ―PERFORMANCE OF FORAGE PEARLMILLET UNDER NITROGEN AND CUTTING MANAGEMENT”. The main aim of the research was to study the effect of nitrogen and cutting management on yield and yield attributes, quality parameters and economics of forage pearlmillet varieties. Split plot design was layed, experimental material consisted of 4 pearlmillet varieties, namely TSFB 15-4, TSFB 15-8, MOTI BAJRA and BAIF BAJRA-1as the main plot. The sub plots consisted of two factors, one being the levels of nitrogen at 80 kg/ha and 120 kg/ha, while the other factor was cutting management- two cut and three cut management system. The soil belonged to the sandy loam textural class with the percentage of sand, silt and clay 57.74%, 27.86% and 14.40% respectively. While organic carbon was reported as 0.41 %, available nitrogen came out 196.7 kg/ha , available phosphorus was found 20.05 kg/ha , available potassium was 119.6 kg/ha , pH was estimated 8.34 whereas EC was 0.33 dS/m. The growth parameters taken into consideration were plant height (cm), number of tillers per row length, number of leaves per plant and leaf: stem ratio of the plants. Quality attributes consisted of total CPC (%) and its yield (q/ha), ash content (%) and its yield (q/ha) and content of NPK uptake (kg/ha). Besides this, green forage yield (t/ha) and dry matter yield (t/ha) were estimated and then the total cost of cultivation, gross returns, net returns and B:C ratio was calculated using all the available data. The observations were recorded separately for first cut, second and third cut and then the interaction effects of nitrogen and cutting managements on the parameters were observed. The growth studies showed significant variations among varieties with varying nitrogen and cutting managements. BAIF BAJRA-1showed a maximum plant height which was statistically at par with MOTI BAJRA and TSFB 15-8 whereas TSFB 15-4 had the minimum plant height. In all the cuts, maximum plant height was obtained when nitrogen was applied at 120 kg/ha, with maximum plant height observed in the first cut, followed by second and third cut. In general the two cut management gave better plant height as compared to the three cut management. Quality traits were maximum in MOTI BAJRA in first cut. The NPK uptake was affected in the sub-plots with different varieties where maximum Nitrogen, Phosphorus and Potassium uptake was worked out in MOTI BAJRA and BAIF BAJRA-1. NPK uptake and ash content values were greater in two cut and crude protein values were more in the three cut management. Green fodder yield and dry matter yield of BAIF BAJRA-1 was highest among all varieties. These yield parameters were higher in the two cut management practice and at application of 120 kg/ha N. Although the total cost of cultivation remained same for all the varieties, BAIF BAJRA-1 excelled other varieties in terms of gross returns, net returns and B:C ratio, closely followed by MOTI BAJRA. Minimum cost of cultivation, highest net returns and thus highest B:C ratio were however incurred by the two cut management practice. The interactions of nitrogen levels and different cutting managements were found to be non-significant.
  • 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
    PRECISION NUTRIENT MANAGEMENT THROUGH RESCHEDULING APPLICATION TIME FOR WIDELY SPACED SUGARCANE CROPS
    (Dr.RPCAU, Pusa, 2021) BHILALA, SURENDRA; Rana, Lalita
    Sugarcane (Saccharum spp.) is a commercially important food and energy crop in tropical and subtropical climates. Sugarcane productivity is largely dependent on nutrient management. Sugarcane responds well to split nitrogen and potassium applications. A field experiment was performed with this in consideration entitled “Precision nutrient management through rescheduling application time for widely spaced sugarcane crops” at Crop Research Centre, Pusa Farm of Sugarcane Research Institute, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur during spring season of 2020-21. The objective of the research were i) to assess the effect of method and split application of N and K on growth, yield attributes and nutrient content in sugarcane plant ii) to assess the quality of sugarcane juice iii) to analyse the nutrient status of post-harvest soil of experimental field iv) to evaluate the economics of different treatments. The soil of the experimental plot was calcareous in nature with a pH value of 8.1. The soil was low in organic carbon (0.41 %), available nitrogen (235.3 kg/ha), medium in available phosphorus (23.5 kg/ha) and available potassium (141.2 kg/ha). The experiment was set up under split plot design replicated thrice having 8 treatment combinations. The main plot was consisting of two methods of fertilizer application (band placement and broadcasting) and four split doses of fertilizer application (RDN+RDK in 5 splits, RDN+RDK in 6 splits, RDN+RDK in 7 splits and recommended dose of fertilizer in sub-plots Total number of plots was 24 with (8.0 m × 8.4 m) 67.2 m2 of individual plot size. Results of the experiment indicated that Band placement method exerted significant influence on tiller population at 120 DAP, (167.85 x103 ha-1) only and split application of nitrogen (N) and potassium (K) had significant influence on tiller population at all growth stages of sugarcane crop. Plant height, leaf area Index (LAI) and dry matter accumulation (DMA) increased with the increasing age of crop. The values of all these growth parameters was higher when nitrogen and potassium fertilizer applied in 7 splits compared to recommended practice, the extent of increase was 8.97 for plant height, 13.70 for LAI and 9.9 % for DMA. Splits application of nitrogen and potassium exerted significant influence on yield attributes namely cane diameter, number of millable cane, length of internodes and cane: top ratio except number of nodes/ cane. Recommended practice of fertilizer application caused significant increase in single cane weight and cane diameter and it was to the tune of 4.72 and 4.01 % respectively while application of N and K in 7 splits produced the higher number of millable cane (144.90 x103 ha-1), length of internode (9.31 cm) and cane: top ratio (3.86), accounting 23.9, 10.7 and 82.9 % respectively. The method of fertilizer application showed non-significant effect on yield attributes except number of millable cane. Band placement method gave significantly maximum number of millable cane (117.98 x103ha-1) as compared to broadcasting. At harvest significantly higher cane yield (86.70 t ha-1) was achieved in band placement method to the tune of 17.32 % as compared to broadcasting while non-significant effect exerted by method of application on sugar yield and commercial cane sugar percentage (CCS). Significantly higher cane yield and sugar yield was registered when the crop fertilizer with nitrogen and potassium in 7 splits, accounting 18.99 and 21.64 % more than the recommended practices respectively. Quality parameters like brix, pol, purity and juice recovery percentage were not influenced by method of fertilizer application. Split application of N and K did not exert significant influence on brix, pol, purity percentage except juice recovery percentage. The uptake of N, P and K was significantly higher in band placement method of fertilizer application accounting 14.13, 36.06 and 17.14 % respectively. Similarly, N, P and K uptake was significantly higher with seven splits of nitrogen and potassium to the tune of 25.9, 13.8 and 33.4 % respectively. In post-harvest analysis of soil, available N (204.38 kg ha-1) was significantly higher in band placement as compared to broadcasting. However, available P and K were non-significantly affected by the method of fertilizer application. The available N (203.97 kg ha-1) and available K (124.30 kg ha-1) was found significantly higher in seven split applications of nitrogen and potassium in comparison to other treatments. Maximum gross returns (246853 ₹/ha), net returns (105448 ₹/ha) and B:C ratio (1.75) was found in band placement method in comparison to broadcasting. Likewise, seven splits application of N and K exerted significant influence on gross returns (242820 ₹/ha), net returns (100385 ₹/ha) as compared to other treatment. Thus it can be inferred that application of nitrogen and potassium in seven splits by band placement method can be recommended as a nutrient management practice to sustain the productivity of sugarcane planted in wide spacing in spring season of Bihar.
  • ThesisItemOpen Access
    Response of nutrient and bio-fertilizers to enhancing yield and productivity of Indian mustard (Brassica juncea L.)
    (Dr.RPCAU, Pusa, 2021) SIKANDAR; Singh, Devendra
    A field experiment entitled “Response of nutrient and bio-fertilizers to enhancing Yield and productivity of Indian mustard (Brassica juncea L.)” was conducted during rabi season of 2020-21 at Agricultural Research Farm TCA, Dholi (Muzaffarpur), a campus of Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur), Bihar, (India). The treatments comprised three fertility levels (F1-100% RDF, F2-75% RDF and F3-Control) in main plots and five microbial consortia (M1-Phosphate solubilizing organism, M2-Azotobacter, M3-Potassium mobilizing Bio-fertilizer, M4-Zinc solubilizing Bio-fertilizer and M5-PSMO + Azotobacter + KMB + ZSB in sub plots. The treatments were replicated thrice in split plot design. Collected soil of experimental site was exhibited sandy loam texture having alkaline nature (pH 8.24), low in organic carbon and available N, P2O5, K2O and Zn. The Indian mustard variety ‘Rajendra Sufalam’ was sown at a distance of 30 cm x 10 cm with seed rate of 5 kg ha-1 with RDF The different fertility levels, F1-100% RDF was significant superior over other fertility levels in term of growth attributes (height of plant, number of branches, dry matter accumulation and relative growth rate), yield attributes and yield as well as higher NPK uptake in grain and straw, availability of N&P soil were negative balance and K was positive balance. Among the microbial consortia, M5- PSMO + Azotobacter + KMB + ZSB was significantly superior impact over other microbial consortia in respect of growth factors (plant height, number of branches, dry matter accumulation and relative growth rate), yield attributes and yield as well as higher NPK uptake in grain and straw. F1-100% RDF was recorded higher net return (₹ 56522 ha-1) and B:C ratio (1.47) than others. In terms of economics of mustard M5- PSMO + Azotobacter + KMB + ZSB was recorded higher net return (₹ 51104 ha-1) and B:C ratio (1.39) as compared other treatments.