2. Institutional Publications

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Author: search.filters.author.Sadanandan, NSubject: search.filters.subject.Sunflower

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Now showing 1 - 5 of 5
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    Effect of different levels of nitrogen and phosphorus on the uptake of nitrogen and phosphorus at various stages of growth of sunflower variety peredovik
    (Kerala Agricultural University, 1976) Thomas Varghese, P; Sadanandan, N; Vikraman Nair, R
    An experiment was conducted at the College of Agriculture, Vellayani to study the effect of graded doses of nitrogen and phosphorus on the uptake of nitrogen and phosphorus at three growth stages of sunflower viz 20th day after planting, flowering and harvest. The effect of nitrogen up to 90 kg/ha resulted in significant linear increase in nitrogen uptake at all the stages except on the 20th day after planting. Phosphorus at 90 kg level showed significance in enhanced nitrogen uptake at the 20th day of planting but not later. While for the phosphorus uptake, significant effect was noticed due to increased levels of application of nitrogen at all the three stages, levels of applied phosphorus did not bring about significant changes in the uptake of this nutrient Increase in uptake of these nutrients showed a linear relationship with the magnitude of growth of the plants.
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    Note on optimum and economic doses of nitrogen and nitrogen utilisation efficiency of sunflower
    (Kerala Agricultural University, 1978) Salam, M A; Sadanandan, N; Mohamed Kunju, U
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    Performance of sunflower varieties under graded doses of nitrogen in redloam soils of Kerala
    (Kerala Agricultural University, 1978) Salam, M A; Sadanandan, N; Nair, K P M; Mohamed Kunju, U
    An experiment using three varieties of sunflower and three levels of nitrogen was conducted at the College of Agriculture, Vellayani during 1974 in order to assess the performance of sunflower varieties under different levels of nitrogen. The varieties tried were EC.68413, EC. 6841 4 and Sunrise selection. The levels of nitrogen were 40 kg, 90 kg and 120 kg per hectare. The results indicated that there was no significant difference among the varieties in plant height, total dry matter production, leaf area index net assimilation rate, lodging, head diameter, number of seeds per head, percentage of filled grains per head, 1000 seed weight and yield of seeds. But, there was significant difference in the yield of atover and oil and protein contents of seeds among them. The effects of incremental doses of nitrogen were significant in head diameter and yield of seeds. Maximum yield of 1887.1 kg seeds per hectare was obtained at 80 kg nitrogen per hectare.
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    Effect of different plant densities on sunflower varieties in red loam soils
    (Kerala Agricultural University, 1978) Salam, M A; Sadanandan, N; Nair, K P M; Mohamed Kunju, U
    An experiment was conducted at the College of Agriculture, Vellayani to study the effect of different spacings on the yield of sunflower varieties. The results revealed that closer spacing decreased the head diameter and number of seeds per head, but significantly increased the total yield of seed. Closer spacing of 30x20 cm gave a maximum yield of 2163.1 kg seeds per hectare. The varieties did not show any difference in yield potential.