Browsing by Author "Pushpangadan, K"

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    Effect of continuous N P K Fertilization on the growth and yield behaviour of coconut with special reference to potash nutrition and its interrelation with other mineral nutrients
    (Department of Agronomy, College of Agriculture, Vellayani, 1985) Pushpangadan, K; Sadanandan, N; Coconut
    At the Coconut Research Station , Balaramapuram in Trivandrum District of Kerala State an experiment was laid out in 1964 to assess the growth characters, yield attributes and yield of coconut variety West Coast Tall. The study was further enlarged to include the critical levels of leaf nutrient concentration as related to yield and the soil fertility statusdue to continued NPK fertilization . The treatments consisted of three levels of N, P and K (N-0, 340, and 680 g;P-0, 225 and 450 g and K-0, 450 and 900 g per palm per year). The experiment was laid out in a 3 raise to 3 partially confounded factorial design with two replications. Application of N enhanced the growth characters viz., production of female flowers, percentage fruit set, yield of nuts, weight of nuts, mean thickness and weight of meat, weight of copra and oil percentage. However the effect of N was found to be quadratic at the highest level applied. Application of P although improved the female flower prodcuction, its effect was negative towards copra weight and oil percentage . For the remaining characters studied, the initial level of 225 g per tree per year was found to be adequate.
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    Effect of date of sowing and nitrogen fertilisation with micronutrients on the yield and quality of hybrid maize (Zea mays, L.)
    (Division of Agronomy, Agricultural College & Research Institute, Vellayani, 1965) Pushpangadan, K; George, C M
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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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    Nutritional requirements of winged bean [Psophocarpus tetragonolobus(L.)DC. ]
    (Department of Agronomy, College of Agriculture, Vellayani, 1984) Brillin, C; Pushpangadan, K
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    Response of rice to methods of sowing under varying seed rates and levels of nitrogen
    (Department of Agronomy, College of Agriculture, Vellayani, 1989) Anil Kumar, N K; Pushpangadan, K
    To find out advantages and disadvantages of a popular method of sowing rice viz. “pinch” method over common method of broadcast sowing of rice in puddle soil, an experiment was conducted at Instructional farm, college of Agriculture, Vellayani, Trivandrum District during the first crop season of 1986 – 87. The treatments consisted of three rates of sowing (60,90 and 120 kg ha-1) two methods of sowing (broadcast and pinch) and three levels of nitrogen (50,70 and 90 kg ha -1). The experiment was replicated thrice in split splot in Randomised Block Design. Triveni variety of rice was used for the experiment. The establishment rate was highest with a seed rate of 120 kg ha -1 in broadcast method. The growth characters such as plant height and leaf area index were unaffected by the treatments. Highest dry matter were obtained with highest seed rate and level of nitrogen. The maximum number of tillers were obtained with medium seeding rate of 90 kg ha -1 and a rate of 70 kg N ha -1 gave the tiller count similar to 90 kg ha -1. The spikelet number, length of panicle, thousand grain weight and percentage of unfilled grains were not altered by the treatments, but the weight of panicle was significantly influenced by seed rates. The number of productive tillers were altered by the rates of seeding and levels of nitrogen. Highest tiller count was recorded with seed rate of 90 kg ha -1 and a nitrogen level of 90 kg ha -1. Grain and straw yield were highest with a seed rate of 90 kg ha -1. The harvest index was not affected by the treatments. Nitrogen uptake was highest with highest seed rate 120 kg ha -1. The other treatments showed no effect on N uptake. A seed rate of 90 kg ha -1 and a nitrogen level of 50 kg ha -1 in broadcast in puddled soil where found to be optimum in Triveni rice variety for economic rice production.