Browsing by Author "Pisharody, P N"
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Item Comparative efficiency of new herbicides for weed control in direct seeded rice fields(Kerala Agricultural University, 1974) Nair, R R; Vidyadharan, K K; Pisharody, P N; Gopalakrishnan, RItem Economics of intensive cropping in double crop wetlands(Kerala Agricultural University, 1977) Nair, R R; Pisharody, P N; Gopalakrishnan, RA field trial was conducted at the Rice Research station, pattambi during 1969—70 and 1970 -71 in order to study the feasibility of raising more than 2 crops of rice in the double crop wet lands. Eight crop sequences were tried with Annapoorna (early duration) and IR 8 (medium duration) as test varieties. The study indicated clearly that 3 early duration rices could be raised in the double crop wet lands during the usual cropping span of 9 months from May through January. This cropping pattern, however, was not profitable at the levy price of Rs. 0.74 per kg of paddy. The study also showed that raising 2 medium duration rices in succession was the most profitable cropping pattern for the double crop wet lands under the existing soil and climatic conditions of pattambi which represent the middle laterite region of Kerala.Item Effect of age of seedlings and nitrogen levels on annapurna rice(Kerala Agricultural University, 1975) Pillai, G R; Nair, R R; Pisharody, P N; Gopalakrishnan, RAn investigation was undertaken to study the effect of age of seedlings and nitrogen levels on Annapurna rice at the Rice Research Station, Pattambi, during first and second crop seasons on 1969-70 and 1970-71. The results revealed that the optimum age of seedlings for transplanting was 15 days during first crop season and 20 days during second crop season. Response due to nitrogen was significant only up to 80 Kg N/ha.Item Effect of fractional application of lime on the growth and yield of rice (Oryzo saliva L.) in the acidic lateritic loam soil of Pattambi(Kerala Agricultural University, 1974) Gopalakrishnan, R; Pisharody, P N; Nair, R R; Pillai, G RItem Effect of spacing, number of seedlings per hill and nitrogen on growth and yield of Annapurna rice (Oryza saliva L.)(Kerala Agricultural University, 1972) Filial, G R; Nair, R R; Pisharody, P N; Qopalakrishnan, RItem Estimation of loss of major plant nutrients in percolation in rice fields(Kerala Agricultural University, 1976) Nair, R R; Pisharody, P N; Gopalakrishnan, RIn an investigation conducted at the Rice Research Station, Pattambi, it was found that appreciable amounts of nitrogen, phosphorus and potash moved out of the root zone of rice plants in percolating water. The magnitudes of loss of these nutrients through percolation during the autumn and winter seasons of 1973-74 are reported in this paper.Item Influence of applied nitrogen on grain yield, protein content and milling outturn in transplanted rice(Kerala Agricultural University, 1976) Pisharody, P N; Nair, R R; Gopalakrishnan, RIn an investigation conducted at the Rice Research Station, Pattambi using the early duration strain Thriveni as test variety, it was found th it application of a portion of nitrogen as top dressing at panicle initiation and booting stages increased grain yield, protein content and recovery of head rice. Protein content of grain and head rice recovery were observed to be closely related. Higher the protein content, greater was the recovery of head rice. On equal nitrogen basis, sulphur coated urea applied at planting was as effective as split application but significantly superior to ordinary urea when applied entirely at planting.Item Investigations on phosphate and potash manuring of transplanted rice(Kerala Agricultural University, 1981) Pisharody, P N; Nair, M S; Nair, R R; Seshadrinath, SItem Investigations on the competing ability of rice with weeds in the rainfed uplands(Kerala Agricultural University, 1975) Nair, K R; Pillai, G R; Pisharody, P N; Gopalakrishnan, RAn investigation was conducted at the Rice Research Station Paltambi during the early kharif seasons of 1972 and 1973 to find out the period of weed competiiion that an upland rice crop could stand without adverse effect on yield, The results revealed that the weed competition was more critical during the early vegetative phase of the crop and that weed free conditions favoured higher grain production. The longest period of weed competition that the upland rice could tolerate was 30 days from sowing without adverse effect on, yield.Item Investigations on the effect of heavy manuring of rice seed beds(Kerala Agricultural University, 1977) Nair, R R; Pillai, G R; Pisharody, P N; Gopalakrishnan, RTwo field experiments were conducted at the Rice Research Station, Pattambi on seed bed manuring using IRS and Jaya as test varieties. The first experiment (1969—70, 1970—71) aimed to study whether nitrogen application in the main field (0, 40, 80," 120 kg/ha) could be reduced by phosphate manuring (0, 30, 60, 90 kg/ha) of the seed bed. The results showed that response to nitrogen was independent of the dose of phosphours applied in the seed bed. The effect of nitrogen (0, 40, 80 kg/ha) phosphorus (0, 25, 50 kg/ha) and potash (0, 25, 50 kg/ha) individually and in factorial combinations, on the productivity of rice seedlings was investigated in tde second experiment (1970- 71, 1971—72). The results conclusivly proved that applied nutrients had no significant influence on grain yield.Item Response of rice to phosphate manuring in a waterlogged laterit1c sandy loam of Kerala(Kerala Agricultural University, 1970) Nair, R R; Pisharody, P NItem Response of upland rice to nitrogen as influenced by bulk density of soil(Kerala Agricultural University, 1976) Nair, R R; Pisharody, P N; Pillai, G R; Gopalakrishnan, R