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20193
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Subject: Agronomy × End date: 2019 × Start date: 2019 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    EFFECT OF INTEGRATED NUTRIENT MANAGEMENT (INM) IN RICE-SESAME-PEA CROPPING SYSTEM
    (2019-07) Bokado, Kangujam; Bora, P. C.
    A field experiment was conducted in Instructional cum Research Farm, Assam Agricultural University, Jorhat for two years i.e, 2016-17 and 2017-18 to study the effect of integrated nutrient management (INM) on growth, yield and quality of rice-sesame-pea cropping system and also to find out the requirement of sulphur in sesame and pea. The treatment consisted of four levels of INM viz., F1: 100% N from inorganic, F2: 25% N from FYM + 75 % N from inorganic, F3: 50% N from FYM + 50 % N from inorganic and F4: 75% N from FYM + 25 % N from inorganic for rice. For sesame and pea, the treatment consisted of four levels of INM (F1, F2, F3 and F4) and four sulphur levels which include S0: 0 kg ha-1, S1: 10 kg ha-1, S2: 20 kg ha-1 and S3: 30 kg ha-1. The experiment consisted of 16 treatment combinations replicated thrice in a split-plot design. The initial soil status of the experimental site was sandy clay loam in texture, acidic in reaction, medium in organic carbon, low in available nitrogen, low in available phosphorus, medium in available potassium and low in available sulphur. Growth and yield components of rice were influenced by INM. Plant height, number of tillers per running metre, plant dry weight (g plant-1), crop growth rate (g m-2 day-1), number of effective tillers m-2 , panicle length (cm), number of grains panicle-1, test weight (g), grain yield (t ha-1), straw yield (t ha-1), harvest index (%) and benefit-cost ratio, protein content (%), carbohydrate content (%) in grain, total nitrogen, phosphorus and potassium uptake was observed to be maximum at 100% N from inorganic. INM and sulphur levels influenced growth and yield components of sesame significantly. Plant height, number of branches plant-1, plant dry weight (g plant-1), crop growth rate (g m-2 day-1), number of capsules plant-1, number of seeds capsule-1, grain yield (t ha-1), stover yield (t ha-1), harvest index (%), protein content (%), oil content (%) in grain, total nitrogen, phosphorus, potassium and sulphur uptake was observed to be maximum at 75% N from FYM + 25% N from inorganic + 30 kg S ha-1. The effect of INM and sulphur on growth and yield components of succeeding pea was significantly influenced by nitrogen levels and sulphur levels. Plant height, number of branches plant-1, plant dry weight (g plant-1), crop growth rate (g m-2 day-1), number of pods plant-1, number of seeds pod-1, pod yield (t ha-1), stover yield (t ha-1), harvest index (%), protein content (%), oil content (%) in seed, total nitrogen, phosphorus, potassium and sulphur uptake was observed to be maximum at 75% N from FYM + 25% N from inorganic+ 30 kg S ha-1.
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    ThesisItemOpen Access
    EFFECT OF IRRIGATION AND NUTRIENT MANAGEMENT IN INDIAN MUSTARD (Brassica juncea) – DIRECT SEEDED AUTUMN RICE (Oryza sativa) CROPPING SYSTEM IN ASSAM
    (AAU, Jorhat, 2019-07) Kumar, Bollaveni Sathish; Das, J. C.
    A field experiment entitled “Effect of irrigation and nutrient management in Indian mustard (Brassica juncea) – direct seeded autumn rice (Oryza sativa) cropping system in Assam” was carried out at the Instructional-cum-Research (ICR) Farm, Assam Agricultural University, Jorhat during two consecutive rabi (Oct- Feb) followed by summer (Feb-June) seasons of 2016 - 2017 and 2017-2018 to evaluate the optimum irrigation and nutrient management practices on growth an yield of the crops. The treatments consisted of four levels of irrigation viz., I0-Rain-fed, I1-IW:CPE=1.20, I2-IW:CPE=1.40 and I3-IW:CPE=1.60 and five levels of nutrient management practices viz., N1- Recommended dose of fertilizers (RDF), N2 – RDF + FYM @ 5t/ha, N3 -75% RDF (N) + 25% N through FYM, N4- 50% RDF (N) + 50% N through FYM and N5- 50% RDF (N) + 50% N through FYM + Bio-fertilizers (Consortium of Azotobacter and PSB), laid out in a split-plot design with irrigations in the main plots and nutrient management practices in the sub-plots and were replicated thrice. The soil of the experimental site was sandy loam in texture, acidic in reaction (pH 5.6), medium in organic carbon (0.65%), low in available N (226.63 kg/ha), available P2O5 (21.18 kg/ha) and available K2O (127.71 kg/ha). The bulk density, field capacity, permanent wilting point and water holding capacity of the soil were 1.38 g/cc, 26.60%, 10.25% and 41.28%, respectively. Results revealed that irrigations at IW:CPE=1.60 followed by IW:CPE=1.40 resulted in higher growth in terms of plant height, dry matter accumulation, crop growth rate and branches per plant as well as yield attributes like number and weight of siliquae per plant and number of seeds per siliqua. The effect of these was reflected in higher yield of seed, stover and oil yield under the same irrigation regimes. The maximum values of N, P and K uptake, weed biomass, microbial population, evapotranspiration and total water use were also observed under these treatments. The higher gross and net returns with higher B:C ratio were found under the irrigation regime IW:CPE=1.60. Pooled over two years also showed similar trend on seed yield of Indian mustard. In regards to nutrient management practices, application of 50% RDF (N) + 50% N through FYM + Bio-fertilizers followed by RDF + FYM @ 5t/ha brought about higher values in growth parameters, yield attributes, yield of seed and stover and oil yield and uptake of N, P and K by both seed and stover over rest of the treatments. Pooled data of two years on seed yield of mustard also showed similar trend. The evapotranspiration and total water use and water use efficiency of the crop were also higher under these treatments. However, comparatively higher gross and net returns and B:C ratio associated with the treatment 50% RDF (N) + 50% N through FYM + Bio-fertilizers. In case of direct seeded autumn rice, application of irrigations at IW:CPE=1.60 and IW:CPE=1.40 resulted in statistically similar values in most of the cases of growth parameters viz., plant height, number of tillers, dry matter accumulation and crop growth rate as well as yield attributing characters like number and weight of panicles/m2 and grains per panicle and were higher over lower irrigation regime and rainfed. These led to produce higher yields of grain and straw and thereby resulted in higher uptake of N, P and K by the crop under the said treatments. The favourable influence of the irrigation regime IW:CPE=1.60 was observed on weed biomass, microbial population, evapotranspiration and total water use by the crop in which it recorded higher values over rest of the treatments. Though the cost of cultivation was considerably more with IW:CPE=1.60, it produced higher gross and net returns with higher B:C ratio. Application of 50% RDF (N) + 50% N through FYM + Bio-fertilizers followed by RDF + FYM @ 5t/ha resulted in higher growth parameters, yield attributing characters, grain and straw yields, uptake of N, P and K by the crop and evapotranspiration, total water use and water use efficiency over rest of the treatments. Pooled over two years data also showed at par effect on grain yield of rice due to these treatments. The highest gross and net returns and B: C ratio were observed under 50% RDF (N) + 50% N through FYM + Bio-fertilizers. In regards to Indian mustard-direct seeded autumn rice cropping system, the irrigation regime IW:CPE ratio 1.60 or IW:CPE ratio 1.40 along with the application of 50% RDF (N) + 50% N through FYM + Bio-fertilizers or RDF + FYM @ 5 t/ha found to produce higher rice equivalent yield of the crops as well as gross and net returns and B: C ratio over other practices.
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    ThesisItemOpen Access
    EFFECT OF INTEGRATED NUTRIENT MANAGEMENT (INM) IN RICE-SESAME-PEA CROPPING SYSTEM
    (AAU, Jorhat, 2019-07) Bokado, Kangujam; Bora, P. C.
    A field experiment was conducted in Instructional cum Research Farm, Assam Agricultural University, Jorhat for two years i.e, 2016-17 and 2017-18 to study the effect of integrated nutrient management (INM) on growth, yield and quality of rice-sesame-pea cropping system and also to find out the requirement of sulphur in sesame and pea. The treatment consisted of four levels of INM viz., F1: 100% N from inorganic, F2: 25% N from FYM + 75 % N from inorganic, F3: 50% N from FYM + 50 % N from inorganic and F4: 75% N from FYM + 25 % N from inorganic for rice. For sesame and pea, the treatment consisted of four levels of INM (F1, F2, F3 and F4) and four sulphur levels which include S0: 0 kg ha-1, S1: 10 kg ha-1, S2: 20 kg ha-1 and S3: 30 kg ha-1. The experiment consisted of 16 treatment combinations replicated thrice in a split-plot design. The initial soil status of the experimental site was sandy clay loam in texture, acidic in reaction, medium in organic carbon, low in available nitrogen, low in available phosphorus, medium in available potassium and low in available sulphur. Growth and yield components of rice were influenced by INM. Plant height, number of tillers per running metre, plant dry weight (g plant-1), crop growth rate (g m-2 day-1), number of effective tillers m-2 , panicle length (cm), number of grains panicle-1, test weight (g), grain yield (t ha-1), straw yield (t ha-1), harvest index (%) and benefit-cost ratio, protein content (%), carbohydrate content (%) in grain, total nitrogen, phosphorus and potassium uptake was observed to be maximum at 100% N from inorganic. INM and sulphur levels influenced growth and yield components of sesame significantly. Plant height, number of branches plant-1, plant dry weight (g plant-1), crop growth rate (g m-2 day-1), number of capsules plant-1, number of seeds capsule-1, grain yield (t ha-1), stover yield (t ha-1), harvest index (%), protein content (%), oil content (%) in grain, total nitrogen, phosphorus, potassium and sulphur uptake was observed to be maximum at 75% N from FYM + 25% N from inorganic + 30 kg S ha-1. The effect of INM and sulphur on growth and yield components of succeeding pea was significantly influenced by nitrogen levels and sulphur levels. Plant height, number of branches plant-1, plant dry weight (g plant-1), crop growth rate (g m-2 day-1), number of pods plant-1, number of seeds pod-1, pod yield (t ha-1), stover yield (t ha-1), harvest index (%), protein content (%), oil content (%) in seed, total nitrogen, phosphorus, potassium and sulphur uptake was observed to be maximum at 75% N from FYM + 25% N from inorganic+ 30 kg S ha-1.