2. Institutional Publications
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Item Influence of graded levels of N, P and K on growth and yield of horse gram(Kerala Agricultural University, 1988) Kumari Swadija, O; Chandrasekharan, P; Nair, V MItem Influence of age of seedlings, spacing & time of application of nitrogen on the yield of rice var I. R. 8(Kerala Agricultural University, 1977) Panikar, R S; Balakrishna Pillai, P; Chandrasekharan, PItem Note on the effect of salt solution spray on the germination of seed in rice(Kerala Agricultural University, 1979) Oommen, M; Chandrasekharan, P; Sadanadan, NItem Effect of salt solution spray on paddy grain maturity and yield(Kerala Agricultural University, 1979) Oommen, M; Chandrasekharan, P; Sadanandan, NItem Effect of phosphorus and lime on the growth attributes and yield Stylosanthes gracilis Swartz(Kerala Agricultural University, 1980) Mariyappan, H; Chandrasekharan, P; Raghavan Pillai, GA field experiment conducted to study the effect of graded doses of phosphorus (0,40, 80, 120 and 160 kg/ha ) on the growth attributes, green and dry matter yields of Stylosanthes gracilis Swartz with two levels of lime [0 and 500 kg/ha] in the red loam soils of the Instructional farm, College of Agriculture. Vellayani has shown that growth attribuies like plant height, number of leaves, number of branches and leaf/stem ratio were not influenced by the application of graded doses of phosphorus except lime which increased the leaf number significantly. Phosphorus at the rate of 120 kg/ha recorded the maximum green matteryteld and dry matter production. Although lime level at 500 kg/ha failed to produce significant increase in green matter and dry matter yields, a positive trend was noticed by lime application.Item Nitrogen nutrition of "rohini"- a short duration rice variety(Kerala Agricultural University, 1985) Chandrasekharan, P; Abdul salam, MItem Effect of phosphorus, lime and cutting interval on green fodder yield, nodulation and protein enrichment of Stylosanthes gracilis and nitrogen in soil(Kerala Agricultural University, 1987) Mariyappan, H; Chandrasekharan, P; Raghavan Pillai, GAn experiment was conducted at the Instructional Farm, College of Agriculture, Vellayani, Kerala during 1977-78 to study the effect of phosphorus levels, lime and cutting intervals on green fodder yield, protein enrichment and nodulation of Stylosanthes gracilis and nitrogen build up in the soil. The treatments constituted five levels of phosphorus viz., 0,40, 80, 120 and 160 kg P205/ha, two levels of lime viz., 0 and 500 kg CaO/ha and two intervals of cutting viz., 30 days and 45 days. The green fodder yield, protein content and protein yield were found to increase progressively upto 120 kg P205/ha. The combination of phosphorus and lime had significant influence in increasing the green fodder yield and protein content. Cutting interval of 45 days recorded more green fodder yield and the combination of 120 kg phosphorus per hectare with 30 days interval of cutting recorded the maximum protein content. Nodule number and weight were found to increase progressively upto 120kg P205/ha. but lime and cutting interval had no significant influence. An increase of 7.3% of total nitrogen content of soil with increase in the levels of phosphorus was observed. Phosphorus and lime together contributed for the increase in the available nitrogen.Item Effect of soil and foliar application of N and P on the yield and quality of blackgram (Vigna Mungo (L) Hepper)(Kerala Agricultural University, 1988) Elizabeth K Syriac; Chandrasekharan, P; Nair, V MA field experiment conducted during the third crop season of 1981—'82 in the rice fallows of the Rice Research Station, Kayamkularn, to study the comparative efficiency of soils as well as foliar application of nitrogen, phosphorus and their combination on the growth, yield and quality of blackgram revealed that the grain yield was significantly increased by the combined application of nitrogen and phosphorus partly through soil and partly through foliage. The maximum grain yield (1631 kg/ha) and net profit (Rs. 3254.80) were recorded by the treatment in which both nitrogen and phosphorus (20 kg N and 30 kg P205/ha) were given 1/3 through soil as basal dose and 2/3 in two equal split doses through the foliage, at the vegetative phase and at flowering. Protein content of grain and grain protein yield were also significantly influenced by the treatments receiving both nitrogen and phosphorus partly through soil and partly through foliage.Item Consumptive use, pattern of soil moisture extraction and water use efficiency of bittergourd (Momordica Charantia L.) under varying irrigation and nitrogen levels(Kerala Agricultural University, 1993) Manorama Thampatti, K C; Santha Kumari, G; Reena Mathew; Chandrasekharan, PThe influence of graded doses of nitrogen and varying levels of irrigation on consumptive use of water, paltern of soil moisture extraction, water use efficiency and f r u i t yield of biltergourd were evaluated during 1988-89 and 1989-90. The consumptive use of water and lit/Eo values of bittergourd increased progressively with levels of nitrogen and irrigation. At higher moisture regimes the variation in consumptive use and Ht/Eo values did not reflect in crop yield. Wale ruse efficiency of the crop maintained a positive relation with levels of nitrogen and a negative relation with levels of irrigation. The soil moisture extraction paltern was not influenced by nitrogen levels. Major part of water was extracted from upper layers of soil irrespective of treatments.Item Effect of N P K fertilisers in conjunction with "Spartin" on the growth and yield of brinjal(Kerala Agricultural University, 1973) Chandrasekharan, P; George, C M