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Subject: Soil Science and Agriculture Chemistry × End date: 2019 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    EFFECT OF ORGANIC AND INORGANIC SOURCES OF NUTRIENTS ON SORGHUM SUDAN GRASS HYBRID - OAT CROPPING SYSTEM
    (CSKHPKV. Palampur, 2019-09) CHAHAL, ARVIND; Sharma, G.D.
    A field experiment entitled “Effect of organic and inorganic sources of nutrients on sorghum sudan grass hybrid-oat cropping system” was conducted at Research Farm of Department of Agronomy, Forages and Grassland Management, CSK, Himachal Pradesh Krishi Vishvavidyalaya, Palampur from Kharif 2017 to Rabi 2018-19. Soil of the experimental site was silty clay loam in texture, acidic in reaction, medium in organic carbon, available phosphorus and available potassium and low in available nitrogen. The experiment was laid out in a Randomized Block Design with two factors and replicated thrice. The treatments consisted of four levels of FYM and biofertilizers viz. control, FYM @10 t ha-1 , Azotobacter+ PSB and FYM @10 t ha-1 + Azotobacter + PSB and four levels of fertilizers viz. no fertilizer, 50, 75 and 100 per cent of recommended fertilizer. Significantly highest plant height, shoots per square meter and dry matter accumulation of sorghum sudan grass hybrid and oat was observed with application of FYM @10 t ha-1 + Azotobacter + PSB than rest of the organic treatments, though this treatment was at par with FYM @10 t ha-1 for leaf stem ratio. Similarly, plant height, shoots per square meter and dry matter accumulation increased with increasing fertilizer levels with highest values recorded with application of 100 per cent of recommended fertilizer though the increase in leaf stem ratio was significant only up to 75 per cent of recommended fertilizer. Significantly highest total green fodder, dry fodder, crude protein, acid detergent fibre and neutral detergent fibre yields and net returns were recorded with the application FYM @10 t ha1 + Azotobacter+ PSB as well as 100 per cent of recommended fertilizer. Application of FYM @10 t ha-1 + Azotobacter+ PSB resulted in higher benefit cost ratio, while, significantly highest benefit cost ratio was recorded with 100 per cent of recommended fertilizer. Crude protein content was significantly higher with application of FYM @10 t ha-1 + Azotobacter+ PSB as well as 100 per cent recommended fertilizer. However, the effect of FYM @10 t ha-1 + Azotobacter+ PSB and FYM @10 t ha-1 was same and resulted in significantly minimum content of acid detergent fibre and neutral detergent fibre. The effect of 75 and 100 per cent of recommended fertilizer was also same and resulted in significantly minimum acid detergent fibre and neutral detergent fibre content.An increase in soil organic carbon, biomass carbon and available NPK was observed with the application of FYM @10 t ha-1+Azotobacter + PSB as well as 100 per cent recommended fertilizer application over the initial status at the end of experiment
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    ThesisItemOpen Access
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    Acid soils of Himachal Pradesh their characterization and lime requirements
    (CSKHPKV, Palampur, 1979) Bishnoi, Surendra K; Tripathi, B.R.
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    ThesisItemOpen Access
    Characterisation and genesis of soils of Himachal Pradesh
    (CSKHPKV, Palampur, 1979) Verma, Shive Dayal; Tripathi, B.R.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    LONG TERM EFFECT OF PRESCRIPTION BASED FERTILIZER APPLICATION ON SOIL CARBON AND POTASSIUM DYNAMICS UNDER MAIZE-WHEAT CROPPING SYSTEM IN AN ACID ALFISOL
    (CSKHPKV, Palampur, 2017-04-20) IBAJANAI, KURBAH; DIX IT, S. P.
    The present investigation was carried out during rabi, 2014-15 and rabi, 2015-16 to study the effect of prescription based fertilizer application on soil organic carbon and potassium dynamics under maize-wheat cropping system in a long term experiment initiated during kharif, 2007 at the Experimental Farm of the Department of Soil Science CSK HPKV, Palampur. The experiment was laid out in a randomized block design with eight treatments. The soil of experimental field was silty clay loam in texture, pH 5.2, organic carbon 7.2 g kg-1 and available N, P and K status was 236, 41 and 272 kg ha-1, respectively. The soil samples from 0- 0.15 m soil depth were collected before and after harvest of wheat and analysed for some physical, physico-chemical, biological properties, fractions of soil organic carbon and potassium in the soil. Grain and straw samples were collected from each plot and analyzed for total N, P, K and micronutrient contents and uptake. There was an overall improvement in the physical properties of soil under STCR (IPNS) treatments for target 25 and 35 q ha-1. Soil organic carbon, pH, CEC, available N, P, K, enzyme activities and DTPA extractable micronutrients were higher under treatments where inorganic fertilizers along with FYM were applied under targeted yield treatments. The study also revealed that the target yield of 35q ha-1 with FYM resulted in highest wheat grain and straw yield during both the years. However, the highest B:C ratio was recorded in treatment for target yield 35 q ha-1 without FYM followed by soil test based treatment. Higher uptake of N, P, K and micronutrients by wheat were recorded in treatments comprising of target yield 25 and 35 q ha-1 with and without FYM. Continuous application of inorganic fertilizers alone or in conjunction with FYM improved the different fractions of soil organic carbon and potassium significantly. All the passive and active pools of soil organic carbon significantly improved under STCR (IPNS) treatments for target yield 25 and 35 qha-1 in comparisons to unfertilized plots. Among K fractions, non- exchangeable K was found to be the most dominant followed by exchangeable K and water soluble K. Different fractions of soil organic carbon were found to be positively and significantly correlated with yield and soil properties except bulk density, where it was negative. All forms of potassium were positively and significantly correlated with grain and straw yield of wheat, available K and total K uptake by wheat.