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Item Extractable aluminium in the rice soils of Kerala(Kerala Agricultural University, 1979) Karthika Kutty Amma, M; Alice Abraham; Aiyer, R STwenty surface soils representing four major rice soil types of Keraia viz., the Kari, Karapadom, Kayal and low level laterites were extracted with different extractants viz.. one normal potasium chloride at different soil solution ratios, one normal ammonium acetate adjusted to different pH values and water and the alluminium estimated. Based on the results, one normal potasium chloride with a soil solution ratio of 1 :10and water were adjudged to be good for predicting toxic levels of Al in this soils. The result obtained further indicate that most of the Al extracted is of the exchangeable type in the case of Kayal and low level laterite soils, while it is not so in the case of Kari and Karapadom soils. The results of the present investigation thus project the need for a very systematic evaluation of the extractable Al content of the highly acid rice soils of Kerala in relation to the existence of Al toxicity to the rice crop.Item Comparative efficiency of foliar and soil application of complex fertilizers on paddy(Kerala Agricultural University, 1978) Alice Abraham; Koshy, M MItem Influence of soluble aluminium on the yield and growth characters of the rice plant(Kerala Agricultural University, 1979) Alice Abraham; Koshy, M M; Aiyer, R SThe effect of 0, 10, 20, 30, 40 and 50 ppm aluminium on the yield and growth characters of the rice plant grown in solution culture was studied, Toxicity symptoms of aluminium were not manifested on the tops while root growth was progressively decreased in 20, 30, 40 and 50 ppm aluminium containing pots. Decrease in root growth was associated with a tendency for root branching and the formation of mere vascular traces in the root cortex. The reduced root growth did not suppress the yield.Item Nutrient fixation in the poonthalpadam soils of Kerala(Kerala Agricultural University, 1986) Sumam George; Alice AbrahamItem Preliminary note on the root nodule bacteria of Indigofera teysmannida(Kerala Agricultural University, Vellanikara, 1963) N. S. Money; Alice Abraham