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Govind Ballabh Pant University of Agriculture and Technology, Pantnagar

After independence, development of the rural sector was considered the primary concern of the Government of India. In 1949, with the appointment of the Radhakrishnan University Education Commission, imparting of agricultural education through the setting up of rural universities became the focal point. Later, in 1954 an Indo-American team led by Dr. K.R. Damle, the Vice-President of ICAR, was constituted that arrived at the idea of establishing a Rural University on the land-grant pattern of USA. As a consequence a contract between the Government of India, the Technical Cooperation Mission and some land-grant universities of USA, was signed to promote agricultural education in the country. The US universities included the universities of Tennessee, the Ohio State University, the Kansas State University, The University of Illinois, the Pennsylvania State University and the University of Missouri. The task of assisting Uttar Pradesh in establishing an agricultural university was assigned to the University of Illinois which signed a contract in 1959 to establish an agricultural University in the State. Dean, H.W. Hannah, of the University of Illinois prepared a blueprint for a Rural University to be set up at the Tarai State Farm in the district Nainital, UP. In the initial stage the University of Illinois also offered the services of its scientists and teachers. Thus, in 1960, the first agricultural university of India, UP Agricultural University, came into being by an Act of legislation, UP Act XI-V of 1958. The Act was later amended under UP Universities Re-enactment and Amendment Act 1972 and the University was rechristened as Govind Ballabh Pant University of Agriculture and Technology keeping in view the contributions of Pt. Govind Ballabh Pant, the then Chief Minister of UP. The University was dedicated to the Nation by the first Prime Minister of India Pt Jawaharlal Nehru on 17 November 1960. The G.B. Pant University is a symbol of successful partnership between India and the United States. The establishment of this university brought about a revolution in agricultural education, research and extension. It paved the way for setting up of 31 other agricultural universities in the country.

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  • ThesisItemOpen Access
    Compatibility between pre-, post-emergence herbicides and beneficial microorganisms under in-vitro conditions and their impact on symbiotic parameters in soybean and biological health of soil
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2023-02) Chatterjee, Ankush; Pareek, Navneet
    An investigation to evaluate the compatibility of beneficial microorganisms including Bradyrhizobium aqingense (S1) and two PGPRs namely Burkholderia arboris (S2) and Pseudomonas sp. (S3) in presence of two pre- emergence and three post-emergence herbicides under in-vitro conditions for improved production of soybean (Glycine max L.) and their impact on soil biological health. The study was carried out in the Soil Microbiology Laboratory, Department of Soil Science, College of Agriculture and Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand during the kharif season in 2022. All selected isolates were characterized for various PGP traits and among the three microbial strains Burkholderia arboris strain (S2) and Pseudomonas sp. strain (S3) showed higher IAA production, HCN production and Siderophore production. Pseudomonas sp. strain (S3) was able to solubilize more P than Burkholderia arboris strain (S2). Bradyrhizobium daqingense strain (S1) showed the highest ACC deaminase activity followed by Burkholderia arboris and Pseudomonas sp. strain (S3). Under in-vitro experiment among the three strains, Burkholderia arboris strain (S2) showed the highest optical density and colony count in presence of the herbicides used at the low concentration followed by medium and high concentration. Pendimethalin (H2) and Diclosulam (H1) promoted the population of bacteria more than Propaquizafop (H3), Imazethapyr (H4) and Propaquizafop + Imazethapyr (H5) which showed lower optical density and colony count than control. Initially colony count and optical density was higher in control at 0th day but gradually it increased in the 5th and the 10th day at the lower concentration and decreased with rising concentrations of herbicides. Seed inoculation of the microbial isolates against the various herbicides showed increase in nodule number from 66.6% to 74.3%, nodule dry weight from 39.2% to 62.2%, nodule leghaemoglobin content from 10.2% to 39.6%, stover dry weight from 7% to 15.2%, grain yield from 28.4% 40.5% over uninoculated control. Nitrogen uptake by stover and grain ranged from 11.3% to 26.1% and 30.8% to 44.5%, respectively. Highest stimulation being done by Burkholderia arboris (S2) and least results were obtained by Bradyrhizobium daqingense (S1). Among the different herbicides, Pendimethalin showed the better results followed by Diclosulam and the other post-emergence herbicides in terms of plant parameters over weedy check. Pendimethalin and the bacterial isolates enhanced soil organic carbon, available N, P, and K to the greatest extent from 1.4% to 12.5%, 4.4% to 11.7%, 11.7% to 27.8% and 7.6% to 17.1%, respectively over weedy check and uninoculated control. Among the bacterial isolates and herbicides used, soil dehydrogenase activity and microbial biomass carbon were stimulated the most by Burkholderia arboris (S2) with an increase from 7.1% to 18.6% over uninoculated control and an increase from 30.7% lower to 3.2% higher and 6.2% lower to 0.3% higher over weedy check was stimulated by Pendimethalin. It can be concluded that Burkholderia arboris (S2) showed better growth against all the five herbicides used whether it is in case of optical density in YEM broth or in case of colony growth on YEMA plates followed by Pseudomonas sp. (S3) and the least by Bradyrhizobium daqingense (S1). Among the three bacterial isolates used, Burkholderia arboris (S2) performed the best and gave a better option to improve the symbiotic properties of soybean crops. In comparison to the postemergence herbicides, the pre-emergence herbicides were less harmful to microbial population prevailing in the soil. Among all the combinations of herbicide and microbial strain, the best interaction effect was shown by combination of Pendimethalin (H2) and Burkholderia arboris (S2).
  • ThesisItemOpen Access
    Development and evaluation of agriculturally important microorganisms (AIMs) consortia for improved production of lentil (Lens culinaris M.) and soil health
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-08) Serawat, Minakshi; Pareek, Navneet
    An investigation to develop and evaluate the Agriculturally Important Microorganisms (AIMs) consortia for improved production of Lentil (Lens culinaris M.) and soil health was carried out in the Department of Soil Science, College of Agriculture and Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand during the years 2019-20 and 2021-22. Out of 5 isolates 03 of Rhizobium i.e. LR-35-01, LA-17 and LB-11 and 02 of PGPRs i.e. KB-133 and LK-791 were selected, screened and found compatible to each other. All selected isolated were characterized for various biochemical, PGP traits and enzymatic activities. All the five isolates produced IAA and siderophore and also found to positive for phosphorus solubilization. Only Rhizobium isolates were positive for zinc solubilization and two isolates i.e. LB-11 and KB-133 were HCN producers. Molecular characterization and identification of all five selected isolated were also performed. Liquid and carrier based consortia formulation of selected isolated were prepared. Viable counts of liquid consortium inoculation KB-133+LR-35-01 recorded higher population compared with Talc based consortium up to six months storage at room temperature. The efficiency of all five Rhizobium and PGPRs as alone and their six consortia were also compared in field for lentil (variety PL-8) during Rabi 2019-20 and Rabi 2021-22. The experimental soil was sandy loam with neutral pH, normal EC having 0.62 and 0.68% organic carbon, 157.33 and 159.24 kg ha-1 available N, 19.10 and 20.84 kg ha-1 available P, 210 and 220 kg ha-1 available K, 0.59 and 0.74 ppm available Zn during both years 2019-20 and 2021-22, respectively. Treatments comprising 5 alone and 6 consortia inoculants with one uninoculated control, RDF (20 kg N ha-1+ 40 kg P2O5 ha-1+20 kg K2O ha-1), RDF-N @ 20 kg N ha-1 and RDF-P @ 40 kg P2O5 ha-1 were laid out in randomized block design in 3 replications. Inoculation of different Rhizobium and PGPRs alone improved nodulation, various plant and root growth parameters, grain and straw yield, nutrient accumulation as well as soil properties and economics (B:C ratio) compared to uninoculated control during the years 2019-20 and 2021-22. Among individual inoculations, LA-17 produced highest nodule number, nodule dry weight, plant height, root length, plant dry weight, root dry biomass, root volume, grain yield, straw yield, nutrients content and uptake in grain and straw (N, P and Zn) as well as available nutrients in soil (N, P and Zn), organic carbon and enzymatic activities (dehydrogenase, urease, acid and alkaline phosphates) during both the years. Further over all consortia inoculation also enhanced plant and root growth parameters, nodulation, yield attributes, yields, nutrient accumulation, nutrients availability and enzymes in soil and B:C ratio over their mono inoculation of Rhizobium and PGPRs during both the years. Consortium inoculation of KB-133+LA-17 produced maximum nodule number at 45 and 60 DAS and nodule dry weight at 60 DAS which was also slightly higher over RDF during both the years. Consortium inoculation KB-133+LA-17 also showed maximum plant dry weight at 60 DAS and at harvest, root dry biomass and root volume at 60 DAS, highest number of pods per plant, grain yield and straw yield as well as various nutrients (N, P and Zn) content and uptake by lentil and soil health parameters which was higher over the individual inoculation of KB-133, LA-17 and RDF during both years. The productivity of lentil in terms of B:C ratio was recorded highest in the consortium inoculation KB-133+LA-17 with Rs. 52684 and 66964 ha-1 net returns and B:C ratio 2.36 and 2.81 during the year 2019-20 and 2021-22, respectively followed by KB- 133+LR-35-01, LK-791+LB-11, LK-791+LA-17, KB-133+LB-11 and LK-791+LR-35-01 which was higher over RDF and other individual inoculation treatments. However, KB-133+LA-17 gave significantly higher B:C ratio over RDF. Thus, the present study provides a strong basis for the recommendation of consortia inoculation of Rhizobium and PGPRs which performed well in improving nodulation, plant growth and yield of lentil and reduces excessive usage of fertilizers and thus, restores soil fertility and maintains soil and environmental quality.
  • ThesisItemOpen Access
    Long term effect of different crop rotations on soil health and different carbon pools in a Mollisol
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-09) Basta Ram; Singh, A.P.
    Field experiments were conducted during the year 2020-21 and 2021-22 in E2 block of Norman E. Borlogue Crop Research Center of GovindBallabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand on the long term effect of different crop rotations on soil health and different carbon pools in a Mollisol. The objective was to study the effect of different approaches to crop rotations on soil health and to investigate the impact of different crop rotations on soil health. The experiment was laid out in randomized block designs with three replications and eleven treatments i.e. T1 (Rice - Wheat - fallow), T2 (Rice - Veg. pea - summer rice), T3 (Maize - Wheat - Cowpea), T4 (Rice - Wheat - Sesbania), T5 (Maize - Toria - Urd), T6 (Rice - Yellow Sarson - Grain Cowpea), T7 (Multi Cut Sorghum - Barseem + Oat - Maize + Cowpea), T8 (H. Napier + Fodder cowpea - Barseem - Fodder cowpea), T9 (Basmati rice - Potato - Maize Cob), T10 (Maize - Broccoli -Okra) and T11 (fallow). Green manure (Sesbania) was used in crop rotation, cut and incorporated intothe soil each year during the kharifseason only and its residual effect on the crop was seen. The inclusion of legume crops was done between the different crop rotations. After the harvest of crops, the data for grain and fodder yield was recorded for respective plots. The soil samples (0-20cm) were collected in June 2021 and June 2022 for the fourth and fifth-year crop rotation study respectively. The experiment results revealed that better soil health and carbon pools of soil were observed with the sesbania and legume-based crop rotations during the fourth (2020) and fifth (2021)year crop rotations as compared to the cereals crop rotations and fallow land. Per cent achievement of physical chemical and biological properties were also recorded relatively higher under green manure and legume-based crop rotations during the fourth (2020) and fifth (2021) year crop rotations as compared to the fallow land. The incorporation of sesbania and legume crops in crop rotation did not have any remarkable influence on soil texture, particle density, pH and EC. Soil physical(Bulk density, water holding capacity and porosity) chemical properties (OC, NPK, Ca2+ Mg2+ Sulfur and zinc) and biological properties (Microbial counts, microbial biomass carbon and enzymatic activity), carbon status (Total organic carbon,organic carbon storage, KMnO4oxidizable carbon and organic matter), carbon pools (active and passive) and soil health indices (Structure stability index, soil health index, biochemical index and carbon management index) improved under the sesbania and legume-based crop rotations as compared to the uncultivated land in fourth(2020) and fifth(2021) year crop rotations.A correlation and scoring technique was adopted to identify the relationship between different soil properties and soil health determination respectively. The high category soil health index was identified with legume and sesbania-based crop rotations under fourth(2020) and fifth(2021) year crop rotations. Thus, the present study provides a strong basis for the recommendation of sesbania and legume-based crop rotation which helps conserve soil health, soil fertilityand environmental quality.
  • ThesisItemOpen Access
    Comparision of STCR and GRD approach for fertilizer recommendation in maize (Zea mays L.) - wheat (Triticum aestivum L.) crop rotation in North Western India
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-10) Sandeep Kumar; Shrivastava, Ajaya
    A field experiment was started since 2018-19 in the D7 block of Norman E. Borlaug Crop Research Centre of G. B. Pant University of Agriculture and Technology, Pantnagar. This thesis work is presented for the year 2021-22, on a comparison of soil test crop response and the GRD approach for fertilizer recommendation in maize–wheat crop rotation. For this experiment a hybrid maize variety (P3401) grown in the kharif season of the year 2021 and a wheat variety (HD 2967) grown in the rabi season of the year 2021-22. The experiment was carried out with three replications and nine treatments in a randomized block design and used treatments were control (T1), GRD (T2), STCR target yield (inorganic mode) (T3), STCR INM mode (T4), 75% STCR dose of N (inorganic mode) + green manure (T5), 50% STCR dose of N (inorganic mode) + green manure (T6), 75% RDN + green manure (T7), 50% RDN + green manure (T8) and FYM + green manure + urd intercropping (T9). It was observed that the residual impact of green manure (Sesbania) was seen only on the wheat crop during the kharif season because the crop was grown on-site, cut and incorporated into the soil during this time period only. There was only intercropping of urd between the rows of maize crops. The grain and straw yields for each plot were recorded after harvest. The plants and soil samples were collected at the end of each cropping season and analyzed according to standard methods. The experiments revealed that both inorganic fertilizers and organic manures (FYM and green manure incorporation) had no significant impact on soil pH and EC. STCR-based approach improved the mineralization of nitrogen, the extraction of phosphorus and the extraction of potassium from the soil. There was a variation in the maize yield between 29.33 q ha-1 and 57.47 q ha-1 during kharif 2021. Wheat grain yields ranged from 28.61 q ha-1 to 49.39 q ha-1 during rabi 2021-22. The crop had higher grain yields and nitrogen, phosphorus and potassium uptake after using 100% STCR-based fertilizers with FYM @ 10 t ha-1. A higher percentage of target yield was also achieved under the STCR INM approach than under NPK alone. STCR-based treatment that included STCR INM and 75% STCR dose of N + green manure had improved soil properties. It was concluded from the present experiment that fertilizer recommendations based on the Soil Test Crop Response approach combined with organic manure assist in the management of nutrients and reduce the use of excessive fertilizers, which restores soil fertility, maintains soil health and environmental quality by reducing excessive fertilizer consumption
  • ThesisItemOpen Access
    Effect of different methods of zinc application on Maize (Zea mays L.) and soil properties in zinc deficient soil
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-08) Negi, Avantika; Gangwar, S. P.
    The field study was carried out with maize crop at Norman E. Borlaug Crop Research Centre, G.B.P.U.A &T, Pantnagar during the year 2021-22 in the Department of Soil Science, Pantnagar. The experiment was laid in Randomized Block Design (RBD) and the treatments were T1: 5 kg Zn ha-1 through soil application, T2: 10 kg Zn ha-1through soil application, T3: 2.5 kg Zn through soil application + FYM 5 t ha-1, T4: 1 % Zn at knee height stage through foliar spray, T5: 1 % Zn at knee height and silking stage through foliar application, T6: Zn solubilizing bacteria solution (IFFCO - @ 3 ml Kg-1 seed) and T7: Control. The study revealed that, amongst various method of zinc application, the soil application of ZnSO4 @ 2.5 kg ha-1 along with the application of FYM (T3) and application of Zn solubilizing bacteria solution through seed treatment (T6) showed positive impact on the crop growth, yield attributing characters (with increment of 36 % zinc content in plant over control) and yield of maize crop. The yield increment in the treatment T3 and T6 were 20 % and 16 % over control. The soil application of ZnSO4 @ 2.5 kg ha-1 along with the application of FYM (T3) showed positive impact in terms of soil zinc status. The soil earlier deficient in zinc was found sufficient after harvest in terms of zinc with 33 % over control The uptake of macro as well as micro nutrient was enhanced with the treatment of soil application of ZnSO4 @ 2.5 kg ha-1 along with the application of FYM. The soil physical properties were remained unaffected with the graded levels of zinc application at various stages. The greatest net monetary returns, and benefit cost ratio were observed with soil application of Zn solubilizing bacteria solution through seed treatment (T6). The foliar application of zinc at various growth stages (treatment T4 and T5) also showed less significant (over T3 and T6) but better results over basal application of ZnSO4 (Treatment T1 and T2).
  • ThesisItemOpen Access
    Effect of nitrogen levels on its fractions, uptake and use efficiency under different genotypes of rice
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-07) Soni, Chhavi; Paul, Jai
    A field experiment was conducted during kharif season of 2021 at Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) for evaluation of ten rice genotypes (CNN-1,CNN-2,CNN-3,CNN-4,CNN-5,BCV-1,RASI,VARADHAN,MTU1010, T193) under varying nitrogen levels (Control, 50 % N, 100 % N). Treatments were tested in Split Plot Design with three replications keeping nitrogen levels in main plots and genotypes in sub plots. Different levels of nitrogen significantly influenced different soil properties including available nitrogen, available phosphorus , available potassium, nitrogen fractions ( ammonical and nitrate nitrogen) and total nitrogen at surface and subsurface depths of soil. Application of nitrogen at 100 % RDN resulted in significantly higher grain and straw yield over all other nitrogen levels. Similarly, significant height of plants, number of tillers m-2 at all stages of crop growth, 1000 grain weight, total nitrogen, phosphorus and potassium uptake were also found to be increased significantly up to 100 % N. The nitrogen use efficiency which includes agronomic use efficiency, partial factor productivity, physiological efficiency and recovery efficiency also found to be higher under 100 % N treatment than that of 50 % N and control. Among rice genotypes in subplot RASI recorded highest ammonical, nitrate nitrogen, total nitrogen at both depths of soil. Similarly, highest grain, straw and biological yield over other genotypes was recorded under RASI followed by CNN-4. RASI genotype also recorded higher number of tillers m-2 at maturity and highest 1000 grain weight which ultimately resulted in higher grain yield. Similarly, maximum uptake of N, P and K in grain and straw was also recorded in genotype RASI followed by CNN-4. The agronomic use efficiency, partial factor productivity and recovery efficiency was also recorded highest under RASI. From the results of this experiment, it has been concluded that different rice genotypes performed better under 100 % RDN in comparison to 50 % RDN and control. The 100 % RDN showed its superiority to improve availability of NPK, fractions of nitrogen, crop yield, uptake of nutrient and nitrogen use efficiency, while RASI followed by CNN-4 showed superiority over others in relations to soil properties, growth, yield and nitrogen use efficiency under study.
  • ThesisItemOpen Access
    Study on saving of water, soil properties and yield in pea (pisum sativum l.) with the use of surfactant and different nutrient inputs
    (G. B. Pant University of Agriculture and Technology, Pantnagar, 2022-08) Arya, Shreyshi; Manisha, Rani
    The experiment was conducted at N.E. Borlaug Crop Research Centre of G. B. Pant University ofAgriculture and Technology, Pantnagar, Uttarakhand during Rabi season of 2021-22 to study on saving of water, soil properties and yield in pea (Pisum sativum L.) with the use of surfactant and different nutrient inputs. Five treatments viz control (T1), vermicompost + irrigation (T2), NPK + irrigation (T3), vermicompost + irrigation with surfactant (T4) and NPK + irrigation with surfactant (T5) were tested in field condition and water use studies were done under three water table regimes W1 (30 ± 1.5 cm), W2 (60 ± 1.5cm) and W3 (90 ± 1.5 cm) in lysimeters. It is clear from the results that the treatment of vermicompost + irrigation with surfactant (T4) resulted in maximum plant height (37.0 cm), number of branches per plant (13.3), number of pods per plant (4.7), pod length (8.3 cm), number of grains per pod (8.3) and yield of green pods (110.1 q/ha) in field condition. Maximum soil organic carbon content (0.76 %), available nitrogen (254 kg/ha), infiltration rate (32.1 mm/hr) and lowest bulk density at 0-20cm (1.18 Mg/m3) and 20-40 cm (1.30 Mg/m3) were also observed under treatment T4. However, available phosphorus (21.42 kg/ha), potassium (154.80 kg/ha) and EC (0.15 dS/m) were recorded maximum under T5 treatment. The application of vermicompost and irrigation with surfactant positively influenced the yield of vegetable pea and important soil physical & chemical properties. In Lysimeter, all yield attributes and yield of vegetable pea were recorded maximum (98.29 q/ha) under the water table depth of W1 (30 ± 1.5 cm). The highest WUE of 33.41 kg/ha/mm was recorded under W3 followed by W2 (27.05 kg/ha/mm) and then W1 (26.36 kg/ha/mm).
  • ThesisItemOpen Access
    Water use efficiency, yield, nutrient uptake by spring maize (zea mays l.) and soil properties under different tillage and mulch practices in mollisols
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-08) Bhatt, Kirti; Singh, Veer
    A field study was conducted in the spring seasons of 2021 at the N. E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar to study the effect of tillage and mulch practices on water use efficiency, yield, nutrient uptake by maize and soil properties in Mollisols. The experiment comprised of three tillage practices viz., conventional tillage (CT), zero tillage (ZT) and half ridge slope planting (RSP) in the main plots, while the two mulch treatments viz., no mulch and maize straw mulch applied @ 6 t ha-1 in the sub-plots tested in factorial randomized block design with 3 replications. Results showed that tillage practices significantly affected the growth, yield attributing characters, yield, nutrient uptake and soil properties. However, mulch application had significant impact on all soil properties and growth and some yield attributing characters. Among different tillage practices, maize grown on the half slope of the ridge recorded higher values of growth, yield attributes and yield of maize over other tillage practices. However, zero tillage sustained the favourable condition for most of the soil properties. Soil properties like bulk density, water stable aggregates, water holding capacity, mean weight diameter, organic carbon, mineralizable N, extractable K were higher from 6.2-7.6,4.1- 20.2, 15.3-22.3,10.5-24.9, 5.0-16.6, 7.7-29.6 and 0.5-2.4%, respectively, under ZT than CT and half RSP. However, half RSP treatment increased soil porosity, electrical conductivity and extractable P while soil pH in CT. Soil organic carbon at surface soil was 0.70 g kg-1 in ZT against 0.65 and 0.54 g kg-1 in RSP and CT, respectively. The maximum 100 grain weight (36.86 g) and grain yield (7084 kg ha-1) were produced under RSP due to the higher root weight, later emergence of tassel and silk, water use efficiency (WUE) and nutrients uptake. As compared with no mulch, application of mulch yielded 3.04% more grain yield by increasing 6.1% WUE. The combined effect of tillage and mulch practices in general non-significantly affected the growth, yield attributing characters, yield, nutrients uptake and soil properties. However, adaptation of ZT along with mulch improved the soil properties while RSP with mulch gave higher growth, yield attributing characters and grain yield (7130 kg ha-1). The saving of water was found in order of ZT with mulch (32.74%) followed by RSP with mulch and ZT without mulch (24.55%) and least under CT with mulch (8.18%). In all tillage and mulch combinations, soil organic carbon and available nutrients were found to be positively correlated with grain yield while maximum negative and significant relationships were noticed between bulk density and grain yield (-0.987*).Water use efficiency, in general had significant correlations with most of the soil properties. Application of half ridge-slope planting with mulch for growth and productivity of spring maize while zero tillage with mulch to sustain soil properties are most beneficial and can be recommended for further study of spring maize in tarai region of Uttarakhand and other sites with similar soils and climate.
  • ThesisItemOpen Access
    Evaluation of soil health under rhizospheric and non rhizospheric zone of different fruit crops
    (G. B. Pant University of Agriculture and Technology, Pantnagar, 2022-07) Sharma, Reeba; Gautam, Poonam
    Present study was carried out to evaluate soil health under rhizospheric and non rhizospheric zone of different fruit crops: litchi, guava, mango, pear, jackfruit, peach, plum and fallow land by collecting representative soil samples (0-20 cm depth) during Rabi 2020-2021 from Horticulture Research Center, G. B. Pant University of Agriculture and Technology, Pantnagar (29.5° N latitude, 79.3° E longitude and 243.84 MSL altitude), District U.S. Nagar (U.K.). The soil samples were analyzed for the determination of various physical, chemical and biological properties using standard procedures to work out different soil health indices: structural stability index, soil organic carbon storage, biochemical index, deterioration index, soil health index and soil quality index. Results revealed that different soil properties varied significantly under different fruit crops and soil zones. Noted range of soil properties was from 1.43 to 1.54 Mg m-3 bulk density, 31.25 to 56.30 % water holding capacity, 6.53 to 7.76 pH, 1.36 to 2.09 % organic carbon, 130.1 to 232.1 kg ha-1 available nitrogen, 21.40 to 50.46 kg ha-1 available phosphorous, 148.3 to 333.5 kg ha-1 available potassium, 0.888 to 2.27 mg kg-1 available zinc, 2.28 to 8.34 mg kg-1 available copper, 0.825 to 2.68 mg kg-1 available manganese, 7.32 to 25.72 mg kg-1 available iron, 3.31 to 6.09 x 108 cfu g-1soil total microbial population, 161.38 to 474.59 μg TPF g-1 soil 24h-1dehydrogenase, 2.64 to 4.40 mg urea g-1 soil 24h-1 urease and 139.37 to 243.76 μg PNPg-1 soil h-1 total phosphatase activities under different fruit crops. On the basis of soil health evaluation indices under rhizospheric and non rhizospheric zone of different fruit crops it was found that 1. Low risk of soil structural degradation under litchi and guava orchards (7.68 and 7.16%, respectively) 2. High soil organic carbon storage and biochemical activities under litchi orchard (59.62 Mg C ha-1 and 1498.6, respectively) 3. No deterioration under fruit orchards soil than fallow land 4. High soil health under litchi (82.50%), mango (77.50%) and guava (72.50%) fruit crops 5. High soil quality under litchi (5.07), mango (4.91) and guava (4.73). Better soil conditions were observed under rhizospheric zone than non rhizospheric zone of different fruit crops. Soil health and soil quality was also found better under fruit crops soil as compared to fallow land. Thus, an overall superiority both in terms of soil nutrient status and soil stability under fruit orchards over fallow land indicated that inclusion of horticultural crops may be an effective strategy to maintain soil sustainability and improve crop productivity.