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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
    Effect of varying levels of boron and sulphur on yields and nutrient uptake of linseed and sunflower grown in a mollisol
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2021-12) Bungla, Prerna; Pachauri, S.P.
    The laboratory and greenhouse experiments were conducted in the micro-nutrient Laboratory and net house of Department of soil science, College of agriculture, GBPUAT, Pantnagar in the year of 2018-2019 to study the leaching behavior of B and S in the presence of either nutrient in soils of varying textures. In pot culture experiment, the effect of B and S application on yields, nutrient concentration and uptake of B and S by linseed and a residual crop of sunflower. Two soils of different textures i.e. sandy loam and clay loam were collected from different depths (0-15, 15-30, 30-45, 45-60 and 60-90 cm) in NBCRC, Pantnagar. These soil samples were packed depth-wise in plastic pipes of 1 inch diameter and 110 cm length. All columns were packed with slightly moist soil at natural bulk density. The lower most pipe was covered with a perforated polythene sheet tied with tight rubber band. Boron and S sources were added as borax and ammonium sulphate (2 mg B kg-1 and 60 mg S kg-1) to the uppermost layer of soil. Soil columns were subjected to 6 cm irrigation at specified time intervals. Boron and sulphur were analyzed in the percolated water samples every 24 h until leaching stopped. Relatively higher amounts of B were lost from the sandy loam soil than clay loam soil and S application delayed the leaching loss of B in sandy loam soil. The kinetics of B and S losses in both the soil could be satisfactorily accounted by a first order kinetics. Pot culture experiment was laid out in a factorial completely randomized design with combinations of six levels of boron (0, 0.5, 1.0, 1.5, 2.0 mg B kg-1 soil and 2 foliar sprays of 0.2% borax at 30 and 45 DAS) and six levels of sulphur (0, 10, 20, 30, 40 and 60 mg S kg-1 soil) with three replications. Linseed (cv. Neelum) and a residual crop of sunflower (cv. Shresta) were taken as test crops and all the treatments were basally applied to linseed only. Two foliar sprays of 0.2% borax were done in sunflower crop at 30 and 45 DAS. The highest total dry matter (6.45 g pot-1), seed yield (2.30 g pot-1), stover yield (4.16 g pot-1), S concentration, B uptake and S uptake was observed under a treatment combination receiving 2 mg B and 60 mg S kg-1 soil. The highest B concentration in seeds and stover of linseed was observed under a treatment combination receiving foliar spray of B and 60 mg S kg-1 soil. The highest total dry matter (48.81 g pot-1), seed yield (13.69 g pot-1) and stover yield of sunflower (35.12 g pot-1) was recorded under a treatment combination receiving 2 mg B and 60 mg S kg-1 soil applied to linseed crop. The highest B concentration in seeds and stover and highest concentration of S in stover of sunflower was noted under a treatment combination receiving foliar spray of B in sunflower and 60 mg S kg-1 soil applied to linseed crop. The highest B uptake of sunflower was recorded under a treatment combination receiving two foliar sprays of 0.2% borax and 60 mg S kg-1 soil applied to linseed crop. The highest S uptake by sunflower was observed under a treatment combination receiving 2 mg B and 40 mg S kg-1 soil applied to linseed crop.
  • ThesisItemOpen Access
    Studies on mesoporous nanosilica and reduced graphene oxide as anocomposites of iron and zinc and their effects on growth, yield of crops and soil quality in mollisols of sub Himalayan region
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2021-08) Durgude, Shubham Anil; Shri Ram
    Synthesis of nanocomposites, characterization and pot culture studies were conducted for evaluate of mesoporous nano silica (mNs) and reduced graphene oxide (rGO) based nanocomposites of iron (Fe) and zinc (Zn) with rice and wheat crops in zinc deficient alluvial soils belonging to the mollisols of sub-Himalayan region. This greenhouse experiment includes fifteen treatments consisted T1:Absolute control, T2: Control / NPK – Zn, - Fe (no zinc & iron applied), T3:NPK + ZnSO4 ( 20 Kg/ha) + FeSO4 (5 kg/ ha) Basal (Silica/Graphene applied in maximum quantity), T4: NPK + 10 ppm Zn (mNs) + 1 ppm Fe (mNs) Foliar, T5:NPK + 20 ppm Zn (mNs) + 3 ppm Fe (mNs) Foliar, T6: NPK + 30 ppm Zn (mNs) + 5 ppm Fe (mNs) Foliar, T7:NPK + 1 ppm Zn (mNs) + 0.5 ppm Fe (mNs) Soil application, T8:NPK + 2 ppm Zn (mNs) + 1 ppm Fe (mNs) Soil application, T9:NPK + 5 ppm Zn (mNs) + 2 ppm Fe (mNs) Soil application, T10: NPK + 10 ppm Zn (rGO) + 1 ppm Fe (rGO) Foliar, T11:NPK + 20 ppm Zn (rGO) + 3 ppm Fe (GO) Foliar, T12:NPK + 30 ppm Zn (rGO) + 5 ppm Fe (rGO) Foliar, T13:NPK + 1 ppm Zn (rGO) + 0.5 ppm Fe (rGO) Soil application, T14:NPK + 2 ppm Zn (rGO) + 1 ppm Fe (rGO) Soil application and T15:NPK + 5 ppm Zn (rGO) + 2 ppm Fe (GO) soil application in completely randomized block design (CRD) with three replications. Synthesis and characterization of nanocomposites conducted in Nanotechnology unit, College of Basic Science and Humanities, G.B Pant University of Agriculture and Technology, Pantnagar and Indian Institute of Technology, Bombay (Maharashtra) respectively. The characterization revealed successful synthesis of wanted nanocomposites through physico-chemical dimensions with average particles size ranging between 30-80 nm. Seed germination study showed that different exposure levels of nano iron and zinc recorded remarkable increase in seed germination and vigour in rice and wheat. Application of mesoporous nano silica and reduced graphene oxide i.e. @30 ppm Zn + 5 ppm Fe showed better results as compared to all treatments. The column study revealed the slow release properties of prepared nanocomposites as compared to conventional fertilizers (iron sulphate and zinc sulphate). The mesoporous nanosilica based nanocomposites showed comparatively extended (slow) release pattern during 100 consecutive days of application as compared to conventional fertilizers of iron and zinc. In greenhouse studies, growth parameters, yield contributing characteristics, yields and nutrients uptake by rice and wheat crops were significantly higher with iron and zinc application as foliar through mesoporous nanosilica @ 30 ppm zinc and 5 ppm of iron over conventional fertilization. Application of @ 30 ppm zinc and 5 ppm through mesoporous nanosilica as foliar application recorded 53% increase rice yield and 20% increase wheat yield as compared to conventional fertilizer application of ZnSO4 and FeSO4. Significant increase in soil available zinc was observed with application of iron and zinc nanoparticles through mNs @ 5 ppm of zinc and 2 ppm of iron as basal application. Soil microbial population viz. bacteria, fungi and actinomycetes were significantly higher with application of iron and zinc nanoparticles through mNs @ 5 ppm of zinc and 2 ppm of iron as basal application. Dehydrogenase activity got severely reduced with application of nanoparticles of iron and zinc @ 5 ppm of zinc and 2 ppm of iron though reduced graphene oxide (rGO) as basal application. The quality of rice and wheat grains found increased positively in terms of test weight, total protein in rice and gluten in wheat with application of nanoparticles of iron and zinc @ 30 ppm zinc and 5 ppm through mesoporous nano silica (mNs) via foliar mode. The macronutrient viz. NPK use efficiency along with fertilizer use efficiency of iron and zinc nanofertilizers found significantly increased with application of nanoparticles of iron and zinc @ 30 ppm zinc and 5 ppm through mesoporous nano silica (mNs) as foliar when compared with conventional fertilizer application. Thus use of nanomaterials for making nanocomposites of iron and zinc are helpful to increase crop productivity along with grain and soil quality.
  • ThesisItemOpen Access
    Impact of nutrient sources on soil carbon pools, soil properties and yield of wheat-urdbean under poplar based agroforestry system
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-06) Ghosh, Sukanya; Paul, Jai
    Field experiment was conducted during rabi and kharif seasons of 2017-19 at Experimental site of Agroforestry Research Centre (old site) near Horticulture Research Centre, Patharchatta of G.B. Pant University of Agriculture and Technology, Pantnagar. The experiment was laid in Randomized Complete Block Design comprising of nine nutrient treatments (chemical fertilizers and its substitution with organics) to study their effects on soil properties under an established poplar agroforestry system with wheat- urd bean cropping sequence. Observed results showed that treatment where application of 50% of recommended dose of N-fertilizers was substituted by FYM+VC gave highest grain yield of wheat (41.6 quintal ha-1) and urdbean (6.86 quintal ha-1) which was significantly higher than all other fertilizer treatments. Due to continuous cropping no perceptible change in pH was observed. Availability of nutrients was found lower in deeper soil layers (15-60 cm) than in surface layer (0-15 cm). The bulk density displayed a growing pattern in respective treatments, with a rise in soil depth (0–30 cm). With integrated nutrient management program, soil physical properties were enhanced. The status of Walkley black carbon showed a growing trend over the years. In control, it was 5.13 g C kg-1, whereas combined use of NPK fertilizers and FYM+VC in 50:50 ratio increased it by 23.5 and 33.2% over T1. With 100 per cent (NPK+FYM+VC) application, the highest concentrations of various carbon pools were found, whereas the control plot displayed the lowest amounts. Regardless of depths, the optimal application of NPK:FYM+VC in 50:50 on N basis demonstrated a higher concentration of organic carbon pools in the soil relative to both controls taken in the study. All the treatments showed higher accumulation of soil organic carbon fractions in surface soil as compared to sub-surface soil. Growing crops without fertilization reduced the percentages of organic carbon fractions. Active and passive soil organic carbon fractions were at peak with joint application of NPK and FYM at all depths of the soil. Active pool (Cfrac1 and Cfrac2) of soil organic carbon contributed more to total carbon in comparison to contribution of passive pool (Cfrac3 and Cfrac4). The results revealed that incorporation of FYM @ 6 t ha-1 with VC @ 2 t ha-1 and NPK has observed significantly higher soil microbial biomass carbon, TOC stock, C-sequestration and C-sequestration rate than any other management practices. Carbon management index values for different nutrient application schemes were observed and found to be good with INM practices. Carbon budget was significantly positive by use on integrated nutrient application in the two year period rather than only chemical or no fertilization. Maximum increase of 54.6% and 73.5% in dehydrogenase and beta-glucosidase, respectively was recorded in the treatment where 50% of RDF was substituted through FYM+VC after wheat harvest. Also its residual effect on enzymes after urdbean harvest was maximum and increased over open control by 62.3% and 86.1%. Therefore, from this experiment it is concluded that application of NPK in conjunction with FYM and VC could be a sustainable management practice to sustain soil fertility, sequester more carbon and maintain/improve soil health vis-a-vis enhanced production of wheat- urdbean cropping sequence under poplar stands in Mollisols.
  • ThesisItemOpen Access
    Characterization of biochars prepared from different plant wastes and their use as source of micronutrients
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2021-02) Labanya, Rini; Srivastava, P.C.
    Six biochars were prepared from three different plant biomasses at two incineration temperature. They were characterized in the laboratory. A pot experiment was also conducted in the net house of Department of Soil Science, G.B.P.U.A.&T., Pantnagar to study the effect of different biochar addition and micronutrients + S doses on dry matter yield, nutrient concentration, nutrient uptake by hybrid Maize (Zea mays L., cv. NMH-589) and soil properties after maize harvest (60 d). Treatments imposed were six different biochars (0.5 t/ha) along with a control (no biochar addition) and four graded levels of different micronutrients+ S (equivalent to 0, 50, 75 and 100 percent) in an asymmetrical factorial completely randomized design with three replications. The present study revealed that biochars were highly carbonaceous residues and the properties of biochars change with the nature of source and also with the increase in the incineration temperature. The concentrations of Zn, Cu, Fe, Mn and B in the biochars were found to be significantly increased with the increase in the incineration temperature from 300 to 450 °C. The adsorption kinetics of micronutrients and S on biochars conformed best to the pseudo-first order kinetics. The concentration dependent adsorption-desorption studies of biochars revealed that they followed Freundlich isotherm model. An increase in incineration temperature significantly increased the adsorbed amount of Zn, Cu, Fe, Mn and B onto biochars but decreased the percent desorption of these micronutrients. The interaction effect of biochar source and incubation temperature had varying effects on adsorption and percent desorption of micronutrients and S. Pot experiment revealed that with application of wheat biochar (W300) and 75 percent of micronutrients+ S doses the highest dry matter yield was obtained. The Zn and Fe uptakes were found to be significantly influenced by the biochar addition, different micronutrients+ S doses and interaction effect of these two variables. Application of 50%, 75% and 100% micronutrients+ S doses significantly increased Mn and B uptake of maize. The interaction effect of biochar addition and application of different micronutrients+ S doses failed to significantly influence Cu, Mn, B and S uptake of maize crop. After the harvest of maize, higher soil pH and EC were recorded under biochar addition and different micronutrients + S doses. The soil organic C showed a significant but minor increase only under the application of the W300 biochar. The highest DTPA extractable Fe, Mn content and 0.15% CaCl2 extractable S content were recorded in treatment combination receiving P300 biochar with application of 100 % micronutrients+ S dose. Thus, biochar can be considered as a good source and carrier of micronutrients and S to improve maize biomass yield and the soil quality.
  • ThesisItemOpen Access
    Impact of long term integrated nutrient management in soybean-wheat cropping system on mollisol of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-05) Awasthi, Shalini Dwivedi; Srivastava, Ajaya
    A study on the impact of Long Term integrated nutrient management in soybean- wheat cropping system on Mollisol of Uttarakhand was done. For that a field experiment was conducted at Norman E Borlauge Crop Research Centre of Govind Ballabh Pant University of Agriculture and Technology, Pantnagar during 2014-17.Combined application of chemical fertilizers along with farm yard manure NPK 100% RDF + 5 ton FYM increased soil pH, EC in soil of soybean and wheat crop during three years while significant increased was observed for organic carbon content, available nitrogen, phosphorus, and potassium in soil of soybean and wheat crop during all three years. Among STCR Targeted yield inorganic and organic mode, STCR Targeted yield 2 organic mode + 5 ton FYM ha-1 significantly increased organic carbon content, available nitrogen, phosphorus, potassium in soil of soybean and wheat crop during three years. Combined application of chemical fertilizers along with organic manure farm yard manure NPK 100% RDF + 5 ton FYM ha-1 significantly increased plant height, number of nodules, number of pods, number of effective tillers, number of ears per plant , grain weight in soybean and wheat crop during all three years. Among STCR Targeted yield inorganic and organic mode, STCR Targeted yield 2 organic mode + 5 ton FYM ha-1 also significantly increased plant height, number of nodules, number of pods, number of effective tillers, number of ears per plant , grain weight in soybean and wheat crop during three years. The highest grain yield, straw yield and biological yield in soybean and wheat crop was obtained by the combined application of chemical fertilizers along with organic manure farm yard manure during three years. The maximum grain yield varied from 29, 30.40, 32.53 q ha-1 in soybean crop and 53.33, 54.53 56.57 q ha-1 in wheat crop was obtained by NPK 100% RDF + 5 ton FYM ha-1 during three years 2014- 17.The highest straw yield varied from 36.54, 38.30, 40.99 q ha-1 in soybean crop and 74.67, 76.35, 79.19 q ha-1 in wheat crop was obtained by NPK 100% RDF + 5 ton FYM ha-1 during three years 2014-17. Among STCR Targeted yield inorganic and organic mode, STCR Targeted yield 2 organic mode + 5 ton FYM ha-1 significantly increased grain and straw yield in soybean and wheat crop during three years 2014-17. Combined application of chemical fertilizers and organic manure NPK 100% RDF + 5 ton FYM ha-1 significantly increased NPK content and uptake by soybean and wheat crop during three years. Among STCR Targeted yield inorganic and organic mode, STCR Targeted yield 2 organic mode + 5 ton FYM ha-1 significantly increased NPK content and uptake by soybean and wheat crop during three years. As a result of improved physical, chemical properties of soil and also improved growth parameters, productivity of soybean and wheat crops in soybean- wheat cropping system due to combined application of chemical fertilizers along with organic manure FYM during three years. From the present investigation it can be elucidated that the combined use of chemical fertilizer along with FYM for three years of soybean -wheat cropping system is a sustainable nutrient management practices because of improved physico- chemical properties of soil and productivity of both crops and also helps to obtained the targeted yield in soybean and wheat crops in soybean – wheat cropping system during three years.
  • ThesisItemOpen Access
    Performance of Rhizobium and PGPR inoculation in mungbean on productivity and soil properties in mungbean-wheat sequence
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-08) Neha; Ramesh Chandra
    A field experiment was conducted to study the performance of Rhizobium and PGPR inoculation in mungbean on productivity and soil properties in mungbean-wheat sequence during 2017-18 and 2018-19. Laboratory study was carried out in the Department of Soil Science and the field experiment at Norman E. Borlaug Crop Research Centre of G.B.P.U.A&T, Pantnagar. The five treatments in mungbean consisting of inoculation with Rhizobium and PGPR, alone and in combination, N as RDF and an uninoculated control were randomized in main plots and three N levels (50, 75 and 100% of RDF) in succeeding wheat in sub plots in three replications. The soil was Sandy loam of neutral pH and low in available N, high in available P and medium in available K. The test crop variety of mungbean was Pant mung-5 and wheat PBW-550. Inoculation of different biofertilizer treatments in mungbean and N as RDF increased the mean nodule number, nodule dry weight and plant dry weight of both the years significantly over the uninoculated control. These treatments also significantly increased the leaf chlorophyll content of mungbean ranging from 1.9 to 11.3% at 60 DAS over the uninoculated control during 2018-19. Different treatments in mungbean recorded significantly higher mean grain yield from 2.5 to 11.7% and numerically more straw yield from 3.7 to 12.1% over the uninoculated control. Inoculation also increased the N and P content and its uptake by grain and straw in comparison to the uninoculated control. Mineral N and available N, P, K in soil at harvesting due to different treatments was 3.5 to 25.8%, 3.5 to 18.8%, 9.4 to 57.2% and 2.9 to 18.7% significantly more over the uninoculated control. Different treatments in mungbean also significantly increased the organic C, microbial biomass C, activities of enzymes dehydrogenase, acid and alkaline phosphomonoesterases and respiration rate in soil. Irrespective of N levels, the different treatments in preceding mungbean significantly increased the mean plant dry weight and plant height of wheat of both the years over the uninoculated control at different intervals. The effect of different treatments in preceding mungbean showed the numerical increases in mean grain of 3.1 to 9.7% and straw yield of 2.2 to 9.4% of succeeding wheat over the uninoculated control. Different inoculation treatments also influenced the various yield attributes of wheat viz. effective tillers, mean spike length, grain weight per spike significantly and total tillers, number of spikelets per spike and thousand grain weight numerically. These treatments also significantly increased N, P and K uptake by wheat grain and straw. The treatments in mungbean significantly affected the mineral, ammonical and nitrate N in soil at different intervals. All the inoculation treatments applied in mungbean also recorded higher organic C and available N, P and K in soil at different intervals. A significant variation in mean microbial biomass C and activities of dehydrogenase and acid and alkaline phosphomonoesterases in soil were also noticed at different intervals suggesting their residual impact on soil health. Increasing levels of N significantly increased the wheat grain and straw yields, mineral, ammonical and nitrate N, available N, P and K, microbial biomass C and activities of dehydrogenase and acid and alkaline phosphomonoesterases in soil at different intervals. The maximum net returns of Rs.1,46,071 ha-1 and B:C ratio of 2.74 were noted with combined inoculation of Rhizobium + PGPR. However, among the N levels, the highest net returns of Rs.1,48,603 ha-1 and the B:C ratio of 2.75 was obtained with 100% fertilizer N under mungbean-wheat sequence.
  • ThesisItemOpen Access
    Soil test crop response studies for efficient nutrient management on brinjal (Solanum melongena L.) grown in a mollisol of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-09) Bhatt, Pallavi; Singh, Sobaran
    Field experiments were conducted during the year 2017-18 and 2018-19 in a Aquic Hapludoll at D7 block of Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar (290 N latitude and 79029’ E longitude), as per the technical programme of the All India Coordinated Research Project on Soil Test Crop Response Correlation. The experiments were conducted in three phases. In the first phase soil fertility gradient was created by dividing experimental field into three strips and applying graded doses of fertilizers (Strip I (no fertilizer), Strip II (100,100 and 100 kg N, P2O5 and K2O/ha) and Strip III (200, 200 and 200 kg N, P2O5 and K2O ha-1) and growing of exhaust crop fodder Oats (Pant 612). In the second phase i.e. next season test crop Brinjal (Solanum melongena L.) was grown in spring and kharif season by dividing each strip in 24 plots having 21 treatments and 3 controlled plots. Response of brinjal var Pant samrat was studied to selected combinations of three levels of FYM (0, 10 and 20 t/ha), four levels of nitrogen (0, 60, 120 and 180 kg ha-1), four levels of phosphorus (0, 30, 60 and 90 kg P2O5 ha-1) and four levels of potassium (0, 30, 60 and 90 kg K2O ha-1) at different fertility levels. In third phase, a verification trial was conducted during 2019 to validate the fertilizer adjustment equations generated by ten treatments and three replications, with combinations of inorganic, organic and growth regulator. The values of the organic carbon, Alkaline KMnO4 extractable N, Olsen’s P and neutral normal Ammonium Acetate extractable K in the experimental field ranged between 0.34 to 1.57 per cent, 100.35 to 200.70 kg ha-1 and 15.06 to 19.85 kg ha-1, 110.88 to 208.32 kg ha-1, respectively. The fruit yield of brinjal ranged from 70.83 to 300.82 q ha-1for spring brinjal and 110.25 to 302.01 q ha-1, for kharif brinjal. The total uptake of N, P and K ranged from 17.57 to 127.26, 2.02 to 37.77 and 9.55 to 63.00 kg ha-1, respectively by spring brinjal. However, for kharif brinjal the total uptake of N, P and K ranged from 15.06 to 159.76, 6.66 to 55.91 and 16.25 to 89.69 kg ha-1, respectively. Suitability of soil test methods was also evaluated by R2 value of multiple regression equation and concluded that Alkaline KMnO4-N, Olsen’s-P and NH4OAc-K methods are suitable for the determination of available nitrogen, phosphorus and potassium, respectively in Tarai region of Uttarakhand for brinjal crop. However, other methods were also found at par and may be recommended for use in soil testing laboratories. Basic data were generated with the help of soil test values, fertilizer doses, yield and nutrient values separately for both the seasons and then taking average for pooled basic data. The nutrient requirement for production of one quintal of brinjal was found to be 0.50 kg Nitrogen, 0.14 kg Phosphorus and 0.25 kg Potassium. Percent contribution of nitrogen, phosphorus and potassium was 31.63, 29.61 and 13.82, respectively from soil, whereas it was 59.58, 94.60 and 81.10 percent respectively from FYM. Percent contribution of nitrogen, phosphorus and potassium without FYM was 39.86, 35.52 and 44.98 and with conjoint use of chemical fertilizer with FYM 50.41, 47.43 and 65.12 percent, respectively. Fertilizer adjustment equations developed for conjoint use of fertilizers with the help of pooled basic data are: FN= 1.00T- 0.63 SN-0.59 ON, F P2O5= 0.68T- 1.43SP- 3.17OP, F K2O = 0.47T- 0.26SK- 0.75OK. Maximum response to spring brinjal was obtained at 120 kg N, 60 kg P2O5 and 60 kg K2O ha-1. While for kharif brinjal, maximum response was obtained at 180 kg N, 30 kg P2O5 and 90 kg K2O ha-1. The fruit yield of spring brinjal was significantly correlated with total uptake of nitrogen (0.636**), total uptake of phosphorus (0.696**) and total uptake of potassium (0.720**). However, for kharif brinjal fruit yield of brinjal significantly correlated total uptake of nitrogen (0.598**), total uptake of phosphorus (0.674**) and total uptake of potassium (0.659**). For the post harvest soil test values prediction equations were developed for available Nitrogen, Phosphorus and potassium. Verification trial was conducted to test the validity of fertilizer adjustment equations. Fertilizer application based on targeted yield approach was found to be significantly superior over general recommended dose (GRD). Findings from present investigation can be successfully utilized for Tarai region of Uttarakhand aseffective guide for efficient and balanced fertilizer recommendation for brinjal.
  • ThesisItemOpen Access
    Effect on soil physical properties, water use and productivity of winter maize (Zea mays L.) under varying irrigation regime and organic mulch in tarai region
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-02) Bhatt, Maneesh; Singh, Veer
    A field study was conducted in the rabi seasons of 2016-17and 2017-18 at the N. E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar to study the effect of irrigation and organic mulching practices on soil physical properties, water use and productivity of winter maize (Zea mays L.) in tarai region. The experiment comprised of three irrigation treatments viz., I1; 20 %, I2; 30 % and I3; 40 % depletion of available soil moisture (DASM) in the main plots, while the four organic mulch treatments viz., M1; no mulch, M2; green gram straw mulch, M3; maize straw mulch and M4; lantana straw mulch applied at 5 t ha-1 in the sub-plots tested in split plot design with 3 replications. Irrigation was provided according to depletion of available soil moisture from the field capacity level. All the irrigation regimes and mulch practices significantly affected the growth, yield attributing characters, yield and soil properties. Compared with un mulched plot, mulching significantly improved growth, yield contributing characters and yield for all levels of irrigation in the both years. The growth, yield of maize and soil physical properties viz., bulk density, water holding capacity and mean weight diameter increased with the increasing frequency of irrigation water in all mulched plots. During two year experiment, irrigation applied at 20% DASM (I1) showed 3.5-10.3, 5.2-35.3, 1.1-17.4, 2.2-15.1, 20.3-78.6, 11.1-18.7 and 1.3-9.2% higher plant height, total uptake of N, P, K, Zn, dehydrogenase activity and grain yield whereas 4.4-10.1, 1.9-13.4, 7.6-18.3, 3.5-37.0, 2.8-9.2, 5.5-21.9, and 6.0-15.5% higher water use efficiency, leaf diffusive resistance, available N, P, K and hydraulic conductivity, respectively, were observed with irrigation given at 40% DASM. Among different mulch practices, green gram straw mulch applied at 5 t ha-1 recorded significantly highest value of grain yield of maize and soil properties over other mulch practices. As compared with no mulch, grain yield was increased by 889, 1004, 863 kg ha-1 by saving 26.2, 9.7 and 24.1% water under green gram straw mulch along with irrigation at 20, 30 and 40% DASM, respectively. Application of irrigation at 40% DASM with green gram straw mulch 5 t ha-1 in general, showed best result which improved soil health and quality by adding organic carbon to the soil, maintained favourable soil temperature and moisture storage in root zone for longer period of time by reducing water loss through evapo-transpiration and drainage. Therefore, this combination would be applicable to improve soil properties and grain yield of rabi maize and can be recommended for further study of winter maize in tarai region of Uttarakhand and other sites with similar soils and climate.