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ThesisItem Open Access Comparative studies on the fixation of nitrogen by certain common legumes(Division of Agronomy, Agricultural college & reseach institute Vellayani, Trivandrum, 1963) Rose, H L; KAU; Madhavan Nair, KThesisItem Open Access Studies on the effect of graded doses of phosphorus in conjunction with lime on growth , yield & phoperous uptake in rice (Oryza sativa Linn.) Var. IR B.(Division of Agronomy, Agricultural college & reserach institute Vellayani, Trivandrum, 1969) Suseelan, P.; KAU; George, C MThesisItem Open Access Studies on the effect of N, P and K fertilization on the growth and yield of chilli (Capsicum annuum, L.)in red loam soils of Kerala(Division of Agronomy, Agricultural college & reseach institute Vellayani, Trivandrum, 1968) Mohamed Kunju, U; KAU; George, C MThesisItem Open Access Studies on the effect of fertilizers on the growth, yield and quality of oil of citronellla(Division of Agronomy, Agriculture college and research institute Vellayani , Trivandrum, 1966) Ravindranathan Pillay, G; KAU; Madhavan Nair, KThe present investigation was undertaken at the agriculture college and research institute , Vellayani during 1964-66 to study the influence of fertilizers on growth yield and quality of oil in citronella.The effect of nutrients nitrogen and potach at three level each and phosphorus and calcium two levels each were studied in a mixed confounded factorial experimnt , in randomised Block design.ThesisItem Open Access Studies on the performance of five varieties of cowpea (Vigna sinencis Savi.) and their response to nitrogen and phosphate fertilization(Division of Agronomy, Agricultural college & reseach institute Vellayani, Trivandrum, 1966) Ravindran Nair, R; KAU; George, C MA field experiment was laid out in the farm attached to the agricultural college and research , Vellayani, during 1965-66 to study the effect of nitrogen and phosphate fertilization on five varieties of cowpea and to determine the best variety, suited to the local conditions . The varieties tried were , new era, M.S .9314, African, C4 and the local. The fertilizer treatments comprised two levels of nitrogen , vis, 0,30,60 and 90 kg./ha.ThesisItem Open Access Effect of irrigation frequencies and mulches on the yield of summer cholam (Sorghum vulgare Pers.)(Regional Post Graduate Training Centre, Agricultural College and Research Institute, Coimbatore, 1963) Abraham Jacob, T; KAU; Mariakulandai, AAn experiment was conducted to find out the relative efficiency of three different moisture regimes, due to irrigation frequencies, at seven, fourteen and twenty one days, and three types of mulching viz., dust, trash and polythene mulches. The modifying effect of the mulches on soil conditions and crop growth was studied, to assess whether irrigation requirements could be reduced without deterioration in yield. The moisture regime had significantly increased the height of plants and length of earheads, while it had no influence on other yield attributes. Length of earhead, breadth of earhead and diameter of peduncle were significantly increased by the mulches.ThesisItem Open Access Nutritional status of soils and the incidence of the bunchy top disease of banana (Var Java)- Part VI Effect of application of calcium and magnesium to soil on the ratio of Calcium oxide/Magnesium oxide in the plant and its relation to bunchy top infection(Division of Agronomy, Agricultural College and Research Institute, Vellayani, 1968) Balakrishna Pillai, P; KAU; Nair, C K NExperiments were laid out under semi-field conditions to study the effect of combined application of calcium oxide and magnesium oxide at different concentrations to soil in the ratio of 3:1. The absorption of calcium , magnesium, nitrogen, phosphorus and potassium by plants from soils containing varying quantities of calcium oxide and magnesium oxide was studied. The plants were allowed to be infected by releasing the virus carrying sphids after the initial period of growth, to study whether there was any resistance to the incidence of bunchy top.ThesisItem Open Access Nutritional status of soils and the incidence of bunchy top disease of bananas (Musa species) Part V Effect of combined application of calcium and magnesium to soil on the ratio of calcium oxide/magnesium oxide in the plant and its relation to bunchy top infection(Division of Agronomy, Agricultural College & Research Institute, Vellayani, 1967) Vikraman Nair, R; KAU; Nair, C. K. NThe experiment to study the effect of combination of calcium and magnesium application to soil on the calcium oxide/magnesium oxide ratio in the plant and on the bunchy topdisease of banaa, was laid out under semi-field conditions. Calcium oxide and magnesium oxide were applied in the ratios 3:1 and 6:1 at two levels of magnesium 0.05 and 0.10 per cent by weight of soil. Uniform levels of nitrogen, phosphorus and potassium in all treatments were given by application of equalquantities of fertilizers. No organic manure was added, to avoid too many uncertain factors which might have influenced the behaviour of calcium and magnesium in the soil and absorption by the plants. The concentration of the insect inoculum was maintained at a uniform level , by releasing infective sphids at the rate of 25 each . Inoculation was done four months after planting. To avoid natural infection before inoculation, periodical sprays of parathion 0.01 per cent had been given as a regular practice.ThesisItem Open Access Preliminary studies on the nitrogen potassium boron and molybdenum requirements of cowpea (V gna s nens s SAVI) variety new era(Division of Agronomy, Agricultural College & Research Institute, Vellayani, 1967) Vijayakumar, N; KAU; George, C MA field experiment was laid out in the farm attached to the Agricultural College and Research Institute, Vellayani during 1967 to study the effect of nitrogen, potassium, boron and molybdenum on cowpea variety , 'New Era'. The compared three levels of nitrogen ,0,10 and 20kg. per hectre, 3 levels of potassium 0,20 and 40 kg. per hectare, 2 levels of boron as 0 and 10kg. Borax per hectare and two levels of molydenum as 0 and 1 kg. Sodium molybdate per hectare.
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