Browsing by Author "Kabeerathumma, S"
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Item Effect of liming on available nutrients and yield of paddy in the acid soils of Kuttanad(Kerala Agricultural University, 1974) Kabeerathumma, S; Money, N SThe significance of lime application to the acid paddy soils of Kuttanad with respect to enhancing available nutrients and yield of paddy varieties was studied. Lime application apart from correction of harmful effects of acidity, increases the availability of essential nutrients and provides better conditions for their assimilation thereby resulting in enhanced yields of rice. The study has also brought out the inherent difference in the nature of acidity between Kari and Karapadom soils and in their capacity for utilisation of applied fertilizers.Item Effect of liming on exchangeable cations and PH of acid soils of Kuttanad(Kerala Agricultural University, 1972) Kabeerathumma, S; Chithranjan Nair, NItem Effect of submergence on the availability of toxic and deficient nutrients in acid sulphate soils of Kerala(Kerala Agricultural University, 1978) Kabeerathumma, S; Patnaik, SLaboratory incubation experiments were conducted with acid sulphate soils of Kerala to investigate the changes in pH exchangeable iron, manganese, aluminium, calcium and potassium. It was noted that flooding resulted in an increase in the soil pH and the extent of increase was determined by certain inherent characters of the soil. The exchangeable Fe content increased and reached a peak value in 30 days and then decreased. The amount of Fe released was dependent on the active iron content of the soils, of submergence. As for Mn Ac/;' and Kayal soils showed a higher release of Mn on flooding. But all the other soils showed only very little change. The course of change of exchangeable Mn was similar to that of Fe. The overall effect of submergence was towards an increased availability of Ca and K.Item Effect of zinc in combination with nitrogen on the yield and yield attributes of rice var. triveni(Kerala Agricultural University, 1977) Kabeerathumma, S; Sasidhar, V K; Sadanandan, N; Koshy, M MItem Influence of liming on the exchangeable potassium of two acid sulphate soils of Kerala(Kerala Agricultural University, 1975) Kabeerathumma, S; Biddappa, C CTwo typical acid sulphate soils of Kerala were employed in this study to investigate the influence of liming at different levels (which was used as an amendment to correct the soil acidity) on the exchangeable potassium with progress of time. It was noticed that the exchangeable potassium was continuously decreased upto 75th days in both the soils and in all the treatments. However when lime was applied at the rate of full lime requirement dose the decrease of the exchange. able potassium was very marked. This probably may be due to conversion of the exchangeable potassium initially to nonexchangeable forms. Thus liming enhanced the fixation of potassium in these soils.Item Kinetics of available silica of submerged acid soils(Kerala Agricultural University, 1987) Kabeerathumma, S; Padmaja, P; Patnaik, SItem Note on the effect of magnesium and molybdenum on soybean yield(Kerala Agricultural University, 1977) Kabeerathumma, S; Sasidhar, V K; Mohammed Kunju, U; Sadanandan, NItem On increasing the efficiency of superphosphate in slightly acid submerged soils(Kerala Agricultural University, 1979) Kabeerathumma, S; Padmaja, P; Koshy, M MItem Optimum superparasitism for the mass breeding of Trichospilus pupivora F.(Kerala Agricultural University, 1971) Kabeerathumma, S; Nair, M R G KItem Studies on the change of lime potential of acid sulphate soils of Kerala on submergence(Kerala Agricultural University, 1980) Kabeerathumma, S; Patnaik, SLaboratory incubation experiments conducted using acid sulphate soils collected from different parts of Kerala revealed that simple lime potential of soil is markedly influenced by moisture and days of submergence. The corrected lime potential of strongly acid soils whose pH remained below five even after submmergence, remained unaffected by submergence.