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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
    Long-term effects of fertilizer application and continuous cropping on soil properties under rice-wheat cropping system in a mollisols
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-07) Singh, Shweta; Shri Ram
    Field experiment was conducted during 2014 productivity and soil quality in an ongoing long term fertilizer experiment at N.E Borlaug CRC, GBPUAT, Pantnagar during years of continuous fertilizer use. Different combination of N,P,K,Zn and FYM treatments have been maintained in a fixed lay out since the beginning of the experiment in a Randomized block design with three replication. Rice variety PR 113 and Wheat variety PBW 502 used for the study. Surface and sub-surface soil samples were collected from the individual plots and were analyzed for soil properties. The soil pH, EC, bulk density and ranged from 7.6 to 7.8, 0.30 to 0.36 dS/m, 1.26 to 1.52 Mg/m respectively at the surface layer and 7.4 to 7.7, 0.27 to 0.37 dS/m, 1.34 to 1.61 Mg/m and 0.62 to 1.24 per cent, respectively at the sub ranged from 7.6 to 7.8, 0.32 to 0.37 dS/m, 1.26 to 1.56 Mg/m respectively at the surface layer and 7.4 to 7.7, 0.29 to 0.38 dS/m, 1.35 to 1.64 Mg/m and 0.61 to 1.16 per cent, respectively along with FYM maintained the pH, EC, organic carbon available N, P, K, total S, o control. The content of N, P, K, total S, 321.9 Kg/ha, 7.9 to 37.4 Kg/ha, 85.2 to 156.5 Kg/ha, 551.2 to 1339.4 mg/kg, 487.6 to 1101.7 mg/kg and 9.7 to 62.1 mg/kg, respectively Kg/ha, 8.5 to 36.7 Kg/ha, 80.8 to 150.8 Kg/ha, 531.4 to 1110.6 mg/kg,424.9 to 931.6 mg/kg and 7.5 to 43.7 mg/kg, respectively 179.3 to 325.7 Kg/ha, 8.8 to 39.1 Kg/ha, 86.3 to 161.3 Kg/ha, 551.8 to 490.5 to 1138.6 mg/kg and 11.8 to 63.4 mg 141.9 to 233.3 Kg/ha, 8.2 to 38 Kg 917.4 mg/kg and 8.3 to 46.5 mg Observed results showed that application of 100% NPK + FYM @ 15t highest grain yield of rice of 50.3 q Shweta Singh Id. No. : 39717 semester, 2014-2015 Degree : M.Sc. (Ag.) Soil Science Deptt. : Soil Science term effects of fertilizer application and continuous cropping on soil properties under rice-wheat cropping system in a Mollisol” Shri Ram ABSTRACT Field experiment was conducted during 2014-15 to assess the change in and soil quality in an ongoing long term fertilizer experiment at N.E Borlaug CRC, GBPUAT, Pantnagar during years of continuous fertilizer use. Different combination of N,P,K,Zn and FYM treatments have been maintained in a fixed lay out of the experiment in a Randomized block design with three replication. Rice variety PR 113 and Wheat variety PBW 502 used for the study. Surface surface soil samples were collected from the individual plots after crop harvest soil properties. The soil pH, EC, bulk density and organic carbon ranged from 7.6 to 7.8, 0.30 to 0.36 dS/m, 1.26 to 1.52 Mg/m3 and 0.67 to 1.62 per cent, respectively at the surface layer and 7.4 to 7.7, 0.27 to 0.37 dS/m, 1.34 to 1.61 Mg/m 1.24 per cent, respectively at the sub-surface layer in rice while in wheat ranged from 7.6 to 7.8, 0.32 to 0.37 dS/m, 1.26 to 1.56 Mg/m3 and 0.64 to 1.53 per cent, respectively at the surface layer and 7.4 to 7.7, 0.29 to 0.38 dS/m, 1.35 to 1.64 Mg/m and 0.61 to 1.16 per cent, respectively, at the sub-surface layer . The application of NPK the pH, EC, organic carbon over initial value. The content of organic S & available S improved significantly ov control. The content of N, P, K, total S, organic S & available S ranged from 173.7 to 321.9 Kg/ha, 7.9 to 37.4 Kg/ha, 85.2 to 156.5 Kg/ha, 551.2 to 1339.4 mg/kg, 487.6 to 1101.7 mg/kg and 9.7 to 62.1 mg/kg, respectively, at the surface layer and 144.2 to 228.7 Kg/ha, 8.5 to 36.7 Kg/ha, 80.8 to 150.8 Kg/ha, 531.4 to 1110.6 mg/kg,424.9 to 931.6 and 7.5 to 43.7 mg/kg, respectively, at the sub-surface layer in rice and in wheat 179.3 to 325.7 Kg/ha, 8.8 to 39.1 Kg/ha, 86.3 to 161.3 Kg/ha, 551.8 to 1340.7 mg/kg, and 11.8 to 63.4 mg/kg, respectively, at the surface layer and ha, 8.2 to 38 Kg/ha, 80 to 162 Kg/ha, 536.4 to 1109.5 mg/kg, 426.8 to kg and 8.3 to 46.5 mg/kg, respectively, at the sub-surface layer . Observed results showed that application of 100% NPK + FYM @ 15t/ highest grain yield of rice of 50.3 q/ha and wheat of 48.2 q/ha which was significantly (Ag.) Soil Science term effects of fertilizer application and continuous wheat cropping system in 15 to assess the change in and soil quality in an ongoing long term fertilizer experiment at N.E Borlaug CRC, GBPUAT, Pantnagar during years of continuous fertilizer use. Different combination of N,P,K,Zn and FYM treatments have been maintained in a fixed lay out of the experiment in a Randomized block design with three replication. Rice variety PR 113 and Wheat variety PBW 502 used for the study. Surface after crop harvest rganic carbon 7 to 1.62 per cent, respectively at the surface layer and 7.4 to 7.7, 0.27 to 0.37 dS/m, 1.34 to 1.61 Mg/m3 surface layer in rice while in wheat it and 0.64 to 1.53 per cent, respectively at the surface layer and 7.4 to 7.7, 0.29 to 0.38 dS/m, 1.35 to 1.64 Mg/m3 surface layer . The application of NPK . The content of rganic S & available S improved significantly over the rganic S & available S ranged from 173.7 to 321.9 Kg/ha, 7.9 to 37.4 Kg/ha, 85.2 to 156.5 Kg/ha, 551.2 to 1339.4 mg/kg, 487.6 to 4.2 to 228.7 Kg/ha, 8.5 to 36.7 Kg/ha, 80.8 to 150.8 Kg/ha, 531.4 to 1110.6 mg/kg,424.9 to 931.6 surface layer in rice and in wheat 1340.7 mg/kg, at the surface layer and kg, 426.8 to /ha gave the ha which was significantly
  • ThesisItemOpen Access
    Long-term effect of fertilizer application, substitution and continuous cropping on soil properties and crop yield under rice-wheat cropping system in a mollisol
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-06) Bhatt, Maneesh; Singh, Ajeet Pratap
  • ThesisItemOpen Access
    Effect of nutrient sources on carbon storage and soil fertility underSonaput-tormeric agroforestry system
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-07) Singh, Huidrom Priyananda; Paul, Jai
    Field experiment was conducted during 2015-16 at experimental site of Agroforestry Research Centre (AFRC), Haldi of G.B. Pant University of Agriculture and Technology, Pantnagar. The experiment was laid out in split plot design (SPD) with two farming systems (C1: Turmeric crops under soapnut based agroforestry system and C2: Turmeric crops under open system) applying different nutrient sources with eight treatments. Soil of the experimental site was silty clay loam texture having bulk density of 1.29 Mg/m3. The soil pH was neutral (7.14) in reaction, high in organic carbon (0.81%), medium in soil organic carbon stock (15.71 t ha-1), low in available nitrogen (165.29 kg ha-1), medium in available phosphorus (16.73 kg ha-1) and medium in available potassium (152.96 kg ha-1) status. The result of the study reveals that soil bulk density and soil pH were decreased by 5.5 and 2.55 per cent,respectively and increased in soil EC, soil organic carbon (SOC), carbon storage, available N, P and K by 3.81, 10.38, 5.36, 17.99, 9.84 and 4.71 per cent, respectively under soapnut based agroforestry system as compared to open system. Different nutrient sources recorded slightly lower soil bulk density and soil pH by 4.34 and 2.37 per cent, respectively whereas EC, SOC, carbon storage, available N, P and K in soil were increased by 1.49, 26.38, 19.16, 41.92, 53.70 and 14.72 per cent, respectively under integrated 100 per cent nutrient sources viz. FYM, poultry manure, vermicompost, wheat straw and NPK as compared to control plot. In turmeric crop, plant height, LAI, NPK content, nutrient uptake, rhizome yield, curcumin content and curing percentage were greatly affected by the soapnut based agroforestry, open system and nutrient sources. Integrated 100 per cent of nutrient sources viz. FYM, poultry manure, vermicompost, wheat straw and NPK recorded highest rhizome yield and was superior by 45.81 per cent over control. However, the rhizome yield was found lower (14.75%) under soapnut based agroforestry system as compared to open system. Curcumin content and curing percentage was also higher under soapnut based agroforestry system by 5.93 and 3.72 per cent, respectively as compared to open system. There was an increment in tree height, DBH and crown width of soapnut tree by 10.04, 5.61 and 6.94 per cent, respectively at the end of study period. Therefore, it is inferred from the present study that turmeric intercropped with soapnut tree is a suitable agroforestry system where the quality of the turmeric (curcumin and curing) was greatly improved under shade of soapnut tree and also improvement in the carbon storage. Hence, such studies with intercropping of shade loving crops under agroforestry system should be continued to study the carbon sequestration under this system.
  • ThesisItemOpen Access
    Studies on biological properties and carbon sequestration under different ecosystems in mollisols of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-07) Ray, Kunal Kumar; Paul, Jay
  • ThesisItemOpen Access
    Nutrient status of Haridwar district of Uttarakhand and their correlation with soil properties
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-06) Bhowmik, Abhijit; Srivastava, Ajaya
    An investigation was carried out to study the distribution of available macronutrients (N, P, K and S) and some micronutrient cations (Fe, Cu, Zn and Mn), their relationship with some physical properties of soil and the evaluation of availability indices for Nitrogen, Phosphorus and Potassium in soils of different blocks of district Haridwar (Uttarakhand).The soils of the district were found sufficient in Phosphorus, Potassium and Sulphur but medium in available Nitrogen content and the soil samples were sufficient in micronutrient cations. Different methods of analysis of soil were employed, to know the best method among them, for availability of N, P, and K. Available Nitrogen was analyzed by Organic carbon and alkaline KMnO4-N methods, available Phosphorus by Olsen’s P, AB-DTPA P, Mehlich-1 P and Bray & Kurtz P and available Potassium by Ammonium acetate K, AB-DTPA K, Mehlich-3 K and Modified Morgan K for the soil samples of district Haridwar. Highest suitability was obtained with Alk. KMnO4 (R2 = 0.558), Olsen’s (R2 = 0.558) and AB-DTPA (R2 = 0.589) method for Nitrogen, Phosphorus and Potassium, respectively. In general the macronutrients were correlated significantly and negatively with pH and positively with organic carbon and the DTPA-extractable micronutrient cations were positively and significantly correlated with organic carbon and clay content but negatively with pH of the soil. The values of the organic carbon, Alkaline KMnO4 extractable N, Olsen’s P and neutral normal Ammonium Acetate extractable K and Calcium Chloride extractable S in the Haridwar district ranged between 0.04-1.31per cent, 101.54-496.98 kg N ha-1, 10.24-63.02 kg P ha-1 and 86.24-436.8 kg K ha-1 and 3.21-133.12 ppm respectively and the values of DTPA-extractable Fe, Cu, Zn and Mn in soil samples of the district were ranged from 2.40-28.84, 0.06-1.21, 0.48-3.94 and 2.91-18.82 ppm respectively. Findings from present study can successfully be utilized for the larger parts of Tarai region of Uttarakhand as effective guide for efficient and balanced fertilizer recommendations.
  • ThesisItemOpen Access
    Soil test crop response studies for balanced fertilization of turmeric (Curcuma longa L.) in a mollisol of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-08) Sarvesh Kumar; Singh, Sobaran
    A field experiment was conducted during the year 2013-14 and 2014-15 in a Aquic Hapludoll at D7 block of Norman E. Borlogue Crop Research Centre of The G.B. Pant University of Agriculture and Technology, Pantnagar (290 N latitude and 79029’ E longitude), as per the technical programme of All India Coordinated Research Project on Soil Test Crop Response Correlation. The experiment was conducted in three phases. In the first phase soil fertility gradient was developed by dividing experimental field into three strips and applying graded doses of fertilizers in them (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 Oat (Var. UPO-212). In the second phase i.e. next season test crop Turmeric (Curcuma longa L.) was grown by dividing each strip in 24 plots having 21 treatments and 3 controlled plots. Response var. Pant peetabh of selected combinations of three levels of FYM (0, 10 and 20 t/ha), four levels of nitrogen (0, 50, 100 and 150 kg ha-1), four levels of phosphorus (0, 50, 100 and 150 kg P2O5 ha-1) and four levels of potassium (0, 50, 100 and 150 kg K2O ha-1) at different fertility levels of turmeric was studied. In third phase, a verification trial was conducted during 2014-15 to validate the fertilizer adjustment equations generated by ten treatments and three replications, with combinations of inorganic, organic and micronutrients. 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 0.58 to 1.05 per cent, 112.90 to 263.42 kg ha-1 and 16.97 to 29.27 kg ha-1, 58.24 to 189.28 kg ha-1, respectively. The total uptake of N, P and K ranged from 68.96 to 371.88, 14.31 to 54.56 and 70.23 to 489.23 kg ha-1 by turmeric, respectively. In the present investigation the total rhizome yield ranged from 113.33 to 354.17 q ha-1 and total haulm yield 9.33 to 45.00 q ha-1. The nutrient requirement for production of one quintal of rhizome yield of turmeric was found to be 0.91 kg Nitrogen, 0.32 kg Phosphorus and 1.02 kg Potassium. Percent contribution of nitrogen, phosphorus and potassium was 61.45, 56.13 and 69.35 from soil, whereas from other sources as FYM was 46.31, 10.3 and 74.91 percent. Percent contribution of nitrogen, phosphorus and potassium without FYM was 119.29, 45.13 and 201.96 and with conjoint use of chemical fertilizer with FYM 143.67, 53.94 and 265.11. Fertilizer adjustment equations developed for conjoint use of fertilizers with the help of basic data are: FN= 0.63T- 0.42 SN-0.32 ON, FP= 0.59T-2.38 SP- 0.43 OP, FK= 0.38 T-0.31 SK-0.34 OK. Coefficient of quadratic multiple regression (R2) was found highly significant (0.687**) between total rhizome yield, soil test values, added fertilizers and interaction between soil and fertilizer. Maximum response to turmeric obtained at 100 kg N, 100 kg P2O5 and 100 kg K2O ha-1. The rhizome yield of turmeric significantly correlated with haulm yield (0.587**), applied N (0.464**), P (0.599**) and K (0.636**) uptake of N (0.883**), P (0.975**) and K (0.852**). The quality parameter of turmeric i.e. curing and curcumin % were positively and significantly correlate with the soil test value and fertilizer doses. For prediction the post harvest soil test values prediction equations were developed for available N, P and K. 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). 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 AB-DTPA-K methods are equally suitable for the determination of available Nitrogen, Phosphorus and Potassium, respectively in Tarai region of Uttarakhand for turmeric crop. However, AB-DTPA may be recommended for use in soil testing laboratories. Findings from present study can successfully utilized for the larger parts of Tarai region of Uttarakhand as effective guide for efficient and balanced fertilizer recommendation to turmeric.
  • ThesisItemOpen Access
    Soil test crop response studies in French bean (Phaseolus vulgaris L.) – maize (Zea mays L.) cropping sequence
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-07) Gangola, Poonam; Gautam, Poonam
    Field experiments were conducted during the year 2013-14 and 2014-15 on Typic Hapludoll in D7 block of Norman E. Borlogue Crop Research Centre of G.B. P. U. & T., Pantnagar (290 N latitude and 79029’ E longitude) on soil test crop response studies. First experiment was conducted as per the technical programme of STCR. Sorghum was taken as an exhaust crop followed by test crops french bean and maize were grown in sequence by dividing each strip in 24 plots (21 treatments and 3 controls). Crop response to selected combinations of four levels of nitrogen (0, 60, 120 and 180 kg ha-1 for french bean and 0, 40, 80 and 120 kg ha-1 for maize), four levels of phosphorus (0, 35, 70 and 105 kgP2O5 ha-1 for french bean and 0, 30, 60 and 90 kg P2O5 ha-1 for maize), four levels of potassium (0, 25, 50 and 75 kg K2O ha-1 for french bean and 0, 20, 40 and 60 kg K2O ha-1 for maize) and three levels of FYM (0, 5 and 10 t ha-1 for both the crops) at different fertility levels was studied. Second experiment was conducted in randomized block design to study the effect of nutrient management on grain yield and fertilizer economics of french bean maize cropping sequence. Organic carbon, alkaline KMnO4-N, Olsen’s-P and NH4OAc-K values ranged between 0.39 to 0.78 per cent, 112.90 to 245.86 kg ha-1 and 11.33 to 24.56 kg ha-1, 106.40 to 254.24 kg ha-1, respectively after soil fertility gradient experiment while, after harvest of french bean (before sowing of maize) these ranged between 0.42 to 0.84 per cent, 125.44 to 275.97 kg ha-1 and 16.02 to 25.63 kg ha-1, 153.44 to 229.60 kg ha-1, respectively. The nutrient requirement to produce one quintal grain yield was 6.91 kg nitrogen, 0.73 kg phosphorus and 8.48 kg potassium for french bean while for maize the values were 2.26 kg nitrogen, 0.74 kg phosphorus and 2.02 kg potassium, respectively. Contribution of nitrogen, phosphorus and potassium from soil was 15.16, 19.28 and 23.95 % in french bean and 26.31, 75.86 and 23.51 % in maize, whereas from FYM it was 32.52, 3.50, 53.42 %; in french bean, 20.76, 19.37, 27.80 % in maize, and from chemical fertilizer 29.10, 11.29, 85.04 in french bean and 21.97, 28.58, 74.54 % in maize. Percent contribution of nutrient from combined use of chemical fertilizer and FYM was 35.05 for nitrogen, 12.50 for phosphorus, 112.79 for potassium in french bean and 31.37 for nitrogen, 39.23 for phosphorus and 96.10 for potassium in maize. Fertilizer adjustment equations for targeted yield of french bean and maize were developed with and without FYM with the help of basic data. Coefficient of quadratic multiple regression (R2) was found highly significant (0.686** in french bean and 0.660** in maize) between grain yield, soil test values, added fertilizers and interaction between soil & fertilizers. On the basis of R2 values of multiple regression alkaline KMnO4, Olsen’s and NH4OAc methods in their combinations were found superior for determination of available nitrogen, phosphorus and potassium. Post harvest prediction equations were also developed for predicting post harvest soil test value after french bean and maize. In second experiment, significantly higher grain yield was found under 100 % STCR + FYM @ 5 t ha-1 followed by 100 % RDF + FYM @ 5 t ha-1 in french bean as well as in maize. Highest B:C ratio was recorded under 100% STCR +5 t FYM ha-1 treatment followed by 100% RDF+ 5 t FYM ha-1 and highest response ratio was recorded in 75% STCR +5 t FYM ha-1 followed by 100% STCR +5 t FYM ha-1 in both the crops. Fertilizer prescription through STCR approach was found superior than the application of recommended dose of fertilizer in terms of yield as well as economics for both the crops. Findings of present study may be used as guide for fertilizer recommendation in similar type of soils.
  • ThesisItemOpen Access
    Differential response of some cowpea genotypes to different zinc supply regimes
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-03) Bhatt, Santosh Chandra; Srivastava, P.C.
    A sand culture experiment and also a separate pot experiments were conducted to study the differential response of cowpea genotypes to different zinc supply regimes. Nine different cowpea genotypes were raised in sand culture with two treatments (with Zn and without Zn) to study the effect of Zn application on root parameters, Zn concentration and uptake in shoot and roots. A soil culture experiment was also conducted using twelve cowpea genotypes receiving three treatments namely, no application of Zn, soil application of 2.5 mg Zn kg-1soil and conjoint use of soil application of 2.5 mg Zn kg-1soil + foliar application of Zn. In sand culture pot experiment, the highest average total root length (944.9 cm), surface area (227.4 cm2), diameter (0.75 mm) and root volume (0.71 cm3) were recorded in V1.The highest average number of root tips was observed in V11 (1676.1). The highest average number of forks (7085.0) and number of crossings (1194.8) was noted in V10. The highest average cation exchange capacity of roots (0.398 meq g-1) and the highest average Zn concentration in shoots (83.8 mg kg-1) was recorded in V5. Zinc application increased the average root length, surface area, root volume and number of forks but decreased the average root cation exchange capacity. The interaction effect of genotypes and Zn levels significantly influenced only root cation exchange capacity. The highest average shoot weight per plant (0.92 g), ratios of Zn concentration and uptake in shoot and roots, Zn uptake in shoot and total Zn uptake were recorded in V6. The highest mean root weight per plant (0.190 g) was recorded in V10. The highest average zinc concentration in shoot and Zn uptake in roots were noted in V5. The highest average Zn concentration in roots was recorded in V3. Zinc application had favourable effect on these parameters except root dry weight. Based on Zinc efficiency index (ZEI) of shoot dry matter the genotype V3, V5, V6, V9 and V10 indicated tolerance to Zn deficiency. In soil culture experiment, genotypic differences were noted in plant height, thousand seed weight, seed and straw yield beside the differences in the concentration of micronutrient cations, P in seed and straw and also phytic acid and protein concentration in seeds. Soil application of 2.5 mg Zn kg-1 soil and conjoint use of soil application of 2.5 mg Zn kg-1 soil + foliar application of Zn increased the average plant height, thousand seed test weight, seed yield, straw yield and Zn concentration in seed and straw significantly over no application of Zn. Soil application of Zn and conjoint use of Zn through soil and foliar application had significant influence on Zn and Mn concentration and uptake of micronutrients cations in seeds and straw of all cowpea genotypes. A significant effect of Zn supply regimes was also noted on P concentration in straw, P uptake in seed and straw, phytic acid and protein concentration in seed. The interaction effect of genotypes and Zn supply regimes influenced the yields, the concentration and uptake of micronutrient cations by cowpea and also the concentration of phytic acid and protein in cowpea seeds. Zinc efficiency indices calculated based on soil application of Zn, genotypes V5, V6, V8 and V9 were tolerant to Zn deficiency and further based on conjoint use of soil + foliar application of Zn, genotypes V3, V8 and V9 appeared to be tolerant. Genotype V2 behaved as the most susceptible genotype under both Zn supply regimes. These tolerant genotypes need to be used for sustainable pulse production and breeding program.
  • ThesisItemOpen Access
    Studies on relationship of soil carbon fractions with crop productivity and soil health under long term fertilizer experiments in rice-wheat cropping system on a mollisols
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-01) Pant, Pawan Kumar; Shri Ram
    Study was conducted during 2012-13 to assess the relationship between soil carbon fractions with crop productivity and soil health in an ongoing long term fertilizer experiment at N. E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar during 41 years of continuous fertilizer use. For study, surface and sub-surface soil samples were collected from individual plots and were analyzed for soil physico-chemical properties and organic carbon fractions. Observed results showed that application of 100% NPK+FYM@ 15 t ha-1 gave highest grain yield of rice (51.87 q ha-1) and wheat (46.17 q ha-1) which was significantly higher than all other fertilizer treatments. Due to continuous cropping no perceptible change in pH was observed. The status of organic carbon showed a declining trend over the years. In control, it reduced to one third of original level of organic carbon (1.48%), whereas combined use of NPK fertilizers and FYM restored its initial status. Availability of nutrients was found lower in deeper soil layers (15-60 cm) than in surface layer (0-15 cm). In absence of P, K and Zn addition, continuous cropping drastically reduced their availability in soil over the years. The bulk density exhibited an increasing trend with increase in soil depth (0–60 cm) in respective treatments. Physical properties of soil were improved with integrated nutrient management system. The greatest accumulation of different carbon fractions were observed with 100% NPK + FYM treatment while control plot showed the lowest value. Irrespective of depths, the balanced application of NPK (100% NPK) showed higher accumulation of soil organic carbon fractions over imbalanced use of fertilizers (100% N or 100% NP). All the treatments showed higher accumulation of soil organic carbon fractions in surface soil as compared to sub-surface soil. Cultivation without fertilization decreased the organic carbon fractions. Active and passive fractions of soil organic carbon were maximum with combined application of NPK and FYM at all the soil depths. The data with respect to rice and wheat yields with different organic carbon fractions viz., TOC, POC, Aggt C, MBC, MBN, KMnO4-C, WSC, HWEC, Humic C, Fulvic C and Humin C, revealed positive and significant correlations while bulk density showed negative correlation. The results indicated that integrated use of fertilizer and FYM enhanced the soil organic carbon fractions whereas continuous rice-wheat cropping without fertilizer use decreased the soil properties and soil organic carbon fraction