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Chaudhary Sarwan Kumar Himachal Pradesh Agriculture University, Palampur

Himachal Pradesh Krishi Vishvavidyalaya (renamed as Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya in June, 2001) was established on 1st November, 1978.The College of Agriculture (established in May, 1966) formed the nucleus of the new farm University. It is ICAR accredited and ISO 9001:2015 certified institution. The Indian Council of Agricultural Research has ranked this University at eleventh place among all farm universities of the country. The University has been given the mandate for making provision for imparting education in agriculture and other allied branches of learning, furthering the advancement of learning and prosecution of research and undertaking extension of such sciences, especially to the rural people of Himachal Pradesh. Over the years, this University has contributed significantly in transforming the farm scenario of Himachal Pradesh. It has developed human resources, varieties and technologies and transferred these to farming community enabling the State to receive the “Krishikarman award” of Govt. of India four times in row for food grain production among small states of the country. Today, the State has earned its name for hill agricultural diversification and the farming community has imposed its faith in the University.

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Subject: Soil Sciences × End date: 2014 × Start date: 2014 × Type: Thesis ×
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    ThesisItemOpen Access
    NITROGEN DYNAMICS AS INFLUENCED BY LONGTERM EFFECT OF PRESCRIPTION BASED FERTILIZER APPLICATION IN AN ACID ALFISOL
    (CSHHPKV Palampur, 2014-07-07) SHABNAM; Sharma, Sanjay K.
    The present investigation was carried out in the ongoing long-term experiment on soil test crop response correlation studies (STCR) initiated during kharif, 2007 at the experimental farm of Department of Soil Science, College of Agriculture, CSK HPKV, Palampur in randomized block design with eight treatments comprising control, farmers’ practice, general fertilizer dose, conventional soil test based fertilizer application and fertilizer application based on STCR approach with and without FYM for yield targets of 30 and 40 q ha-1 . The soil of the experimental site was Typic Hapludalf, silty clay loam in texture, acidic in reaction, medium in organic carbon, low in available N, high in P and medium in K at the initiation of the experiment. Soil samples (0-0.15m) taken after the harvest of maize (kharif, 2013) were analyzed for different forms of nitrogen and pH, OC, CEC, microbial biomass carbon and available N, P and K. Grain and stover yields of maize were recorded and uptake of various nutrients by maize was also worked out after the plant analysis. Continuous application of chemical fertilizers either alone or in combination with FYM enhanced the contents of different organic and inorganic nitrogen fractions. However, prescription based fertilizer application involving conjunctive use of fertilizers and FYM for yield targets of 30 and 40 q ha-1 proved superior to general fertilizer recommendation as well as conventional soil test based fertilizer application in influencing various forms of nitrogen. Likewise, highest contents of OC (8.3 g kg-1 ), CEC (13.4 c mol (p+ ) kg-1 ), microbial biomass carbon (119.5 mg kg-1 ), available N (282 kg ha-1 ), P (61 kg ha-1 ) and K (279 kg ha-1 ) were found under STCR (IPNS) based treatment for target yield of 40 q ha-1 which ultimately, resulted in the highest productivity of maize (37.6 q ha-1 ). In general, the contribution of different organic as well as inorganic forms of nitrogen viz., hydrolysable ammonical-N, amino acid-N, serine+threonine-N, hexosamine-N, unidentified-N, non hydrolysable-N, ammonical-N and nitrate-N, towards the total-N was 24.3, 24.4, 5.4, 7, 23, 6.4, 5.5 and 3.6 percent, respectively. Continuous cropping without fertilization resulted in depletion in hydrolysable ammonical-N, amino acid-N, serine+threonine-N, hexoseamine-N, unidentified-N and non-hydrolysable-N to the extent of 24, 17, 23, 3.6, 12 and 8 per cent, respectively. Hydrolysable ammonical-N exhibited highest correlation with available N (r=0.882) and accounted for 78 percent variation in available N. Hydrolysable ammonical-N recorded highest correlation with grain yield (r=0.898) and accounted for about 88 per cent of the variation, whereas, amino acid-N showed the highest correlation with stover yield (r=0.902) and accounted for about 81 per cent of the variation. Different fractions of nitrogen were found to be positively and significantly correlated with one another except non hydrolysable-N.