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ThesisItem Open Access Studies on the performance of two groundnut varieties, TMV-2 and TMV-9, under graded doses of phosphorus and potassium.(Department of Agronomy, College of Agriculture, Vellayani, 1978) Purushothaman Nair, N; KAU; Sadanandan, NThesisItem 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 phospherus nutrition liming and rhizobial inculation on soybean(Department of Agronomy, College of Horticulture, Vellanikkara, 1979) Kurian, T M; KAU; Vikraman, RAn experiment was conducted at the Instructional Farm attached to the College of Horticulture, Vellanikkara during July to October 1978, to study the effect of phosphorus nutrition, liming and rhizobial inoculation on soybean (Glycine max (L.) Merril). The investigation was taken up with the objective of arriving at the phosphorus requirement of the crop, assessing the response to liming and evaluating the effect of rhizobial inoculation. The trial was also aimed at studying the possible interaction effects between these factors. The experiment was laid out as a factorial in randomized block design with 16 treatments and 3 replications. The study revealed that applied phosphorus did not significantly affect any of the growth characters consistently. Grain yield and yield attributes were also unaffected but stover yield increased with higher doses of applied phosphorus. In general, nitrogen, phosphorus and calcium contents in plant components were unaffected by levels of phosphorus, liming and rhizobial inoculation. Uptake of these nutrients also remained almost unchanged. At harvest, nitrogen uptake by seeds constituted 44 per cent of the total, remaining being accumulated in stem + petiole and shell. In the case of phosphorus, 86.9 per cent of the total accumulation was in seeds, 6.0 percent and 7.1 per cent being in stem + petiole and shell respectively. Calcium being an immobile nutrient and an element not translocated within the plant, proportion of uptake of calcium in various components of the plant was different from that of nitrogen and phosphorus. In contrast to nitrogen and phosphorus, only 24.9 per cent of the total was found in seeds whereas 36.3 per cent and 38.8 per cent of it were concentrated in stem + petiole and shell respectively. Levels of phosphorus, had no effect on total nitrogen and available potassium contents of soil after harvest of the crop but there was a notable increase in available phosphorus and decrease in exchangeable calcium. Liming and rhizobial inoculation did not have any conspicuous effect on the content of nutrients in soil.ThesisItem Open Access Intercropping tapioca (Manihot esculenta Crantz.) with pulses and groundnut(Department of Agronomy, College of Agriculture, Vellayani, 1978) Ramakrishna Bhat, H; KAU; Sadanandan, NAn experiment was conducted in the College of Agriculture, Vellayani during the year 1977-1978 to study the performance of tapioca intercropped with different legumes (Blackgram, cowpea, greengram and groundnut) applied with different fertilizer, half the recommended dose and full recommeded dose). The experiment was laid out in a randomised block design with three replications. The experiment was conducted under rainfed conditions. The results revealed that the growth as measured from height and number of leaves and yield of tapioca as adjudged by the various yield attributes was not depressed by growing the four legumes at the three levels of fertilizers. On the other hand the quality and size of tapioca tubers were improved due to legume intercropping. The dry matter content, starch content and the HCN content of tapioca tubers were increased significantly due to growing of legumes in association with tapioca.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.
