2. Institutional Publications

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Author: search.filters.author.George, C M

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    Chemical weed control in rice under semi dry conditions
    (Kerala Agricultural University, 1979) Ramakishnan Nair, T; Balakrishna Pillai, P; George, C M
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    Yield potential and nitrogen response of early rice culture, 24-20
    (Kerala Agricultural University, 1974) Kuriakose, T F; George, C M
    The yield potential, nitrogen response and the anicillary characteristics of the early rice culture, 24-20 that matured in 75-80 days under Vellayani conditions were studied in relation to four levels of nitrogen fertilization. The maximum grain yield of 5559 Kg. per hectare was obtained at 90 Kg nitrogen level. The maximum productivity of the early culture was 68.8 Kg. per hectare per day indicating that a a moderately higher grain yield could be obtained with varieties of 80 day duration. The optimum nitrogen requirement was found to be 82.35 Kg. per hectare. The important role of very early varieties in the context of limited availability < - f nitrogenous fertilizers is also indicated.
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    Effect of nitrogen and phosphorus on the yield and quality of groundnut (Arachis hypogaea L) in the red loam soils of Kerala
    (Kerala Agricultural University, 1974) Punnoose, K I; George, C M
    A trial was conducted in the red loam soils of the farm attached to the College of Agriculture Vellayani, Kerala State, during the year 1967 to study the response to graded doses of nitrogen and phosphorus on the yield and Quality of groundnut variety. The data relating to the yield and quality factors were studied. Quadratic response curves were fitted to the yield data and ihe optimum as well as the economic doses of nitrogen and phosphorus were determined. There was significant positive response in yield to nitrogen and phosphorus application. The 10kg. level of nitrogen gave the highest yield. Phosphorus has progressively increased the yield with incremental doses. A combination of 10 Kg. nitrogen and 75 kg. P5O has given the maximum pod yield of 2195.24 Kg/ha. The oil content of kernel was significantly depressed by nitrogen application. But phosphorus application has resulted in a significant increase in oil content. Graded doses of nitrogen and phosphorus could markedly increase the protein content of kernel. The economic doses were found to be 12.72 kg. nitrogen and 54.04 kg. P2O3/ha.
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    Effect of date of sowing and nitrogen fertilization with micronutrients on the yield and quality of hybrid maize - deccan makka
    (Kerala Agricultural University, 1975) Pushpangadan, K; George, C M
    An investigation carried out at the Agricultural College Vellayani to study the effect of date of sowing and nitrogen fertilization combined with a mixture of micronutrients revealed that the most suitable date of sowing would be before the onset of the South West monsoon round about June 10 and June 20 provided there is adequate pre-monsoon showers for early agricultural operations. For a plant population of about 43, 250 per ha. the optimum level of nitrogen would be 186 kg per ha. Application of micronutrient mixture does not seem to influence the growth and yield attributes of corn.
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    Effect of applied nitrogen and phosphorus on the nodulation in groundnut (Arachis hypogaea L.)
    (Kerala Agricultural University, 1975) Punnoose, K M; George, C M
    An experiment was conducted in red loam soils of the farm attached to the Agricultural College Vellayani, with the object of studying the effect of applied nitrogen and phosphorus on the nodulation in groundnut. The levels of nitrogen were 0, 10 and 20 kg/ha and those of phosphorus 0, 25, 50, 75, and 100 kg/ha. The number and dry weight of nodules per plant observed at three stages of 2, 4, and 6, weeks after planting were studied. Application of nitrogen significantly reduced and the phosphorus application significantly increased the mean number and dry - weight of nodules at all the three stages of observation. It was also noticed that both the mean number and dry - weight of nodules have increased from the first stage of observation to the second stage and thereafter decreased in the third stage.
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    Effect of phosphorus and molybdenum on flowering and podformation in groundnut CO POL-1
    (Kerala Agricultural University, 1975) Muralidharan, A; George, C M; Sadanandan, N
    Field experiment conducted at tiie Agricultural College, Vellayani with 4 levels of PaO,, and 3 levels of molybdenum revealed that i l ) Application of P2O6 @ 50 kg/ha significantly reduced the preblossom period which was delayed by higher levels of phosphorus and molybdenum. (2) P2O,s ••<(. 85 and 100 kg/ha increased the number of pegs and mature pods/plant. Molybdenum though increased the number of pegs/plant did not influence the numbsr of mature pods/plant. (3) PaO- and molybdenum at higher levels reduced the percentage of pegs developed to mature pods.
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    Comparative performance of two rice varieties (IR 8 & PTB-9) with varying levels of seed rate and nitrogen under semi-dry conditions
    (Kerala Agricultural University, 1978) Poulose, K C; George, C M; Sreedharan, C; Sasidhar, V K
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    Studies on the response N, P and K in conjunction with Ca on the growth and yield of tapioca (Manihot utilissima Pohl) var. malayan-4
    (Kerala Agricultural University, 1978) Gopalakrishna Pillai, K; George, C M
    A field experiment to study the response of three graded levels each of nitrogen (50, 100 and 150 kg N/ha), phosphorus (0, 50 and 100 kg P205/ha) potash (100, 150 and 200 kg K20/ha) in conjunction with calcium (0,600 and 1200 kg CaO/ha) on the growth and yield of tapioca var. "Malayan-4" grown in the acid red loam soils of the Agricultural College farm at Vellayani, Trivandrum has shown that the plant height, as well as weight of vegetative parts were generally increased by N and K; while branching of stems and number of tubers were increased by N and Ca application. Higher levels of N, K and Ca were instrumental for increased girth of tubers, while the tuber yield was increased by all the four elements. Application of 100 kg N, 50 kg P205 and 150 kg K20 in conjunction with 600 kg CaO per ha seems to be most promising for realising the maximum tuber yield of this variety of tapioca under the conditions of this experiment.
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    Studies on the uptake pattern of phosphorus by rice under graded doses of phosphorus in conjunction with lime
    (Kerala Agricultural University, 1978) Suseelan, P; George, C M; Sreedharan, C
    An experiment was laid out in the sandy clay loam soils of the Agricultural College, Vellayani, Kerala during the first crop (Virippu) season of 1968 to study the uptake pattern of phosphorus by rice under graded doses of phosphorus in conjunction with lime using the rice variety I.R.8. The treatments consisted of 4 levels of phosphorus (0, 50, 100 and 150 kg P205/ha, respectively) and two levels of lime (0 and 3273 kg slaked lime/ha, respectively) laid out in randomised block design replicated four times. There was significant increase, in the uptake of phosphorus by the plant with increasing levels of phosphorus whether applied alone or in conjunction with lime. The pattern of phosphorus absorption showed an increasing trend upto the primordia initiation stage, followed by a gradual depression thereafter. Application of lime has favourably influenced the uptake of phosphorus at all stages of growth.
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    Effect of phosphorus and lime application on rice variety-I. R. 8
    (Kerala Agricultural University, 1977) Suseelan, P; George, C M; Sreedharan, C