000			01358nam a2200217Ia 4500
008			220216s9999 xx 000 0 und d
100			_aSudhakumari B
245		0	_aEvaluation of two extractants for the estimation of available potassium, Calcium and magnesium in acid soils under rubber
260			_bIndian Journal of Natural Rubber Research _c1994
300			_a103-106
520			_aTwo extractants were compared for the estimation of available K, Ca and Mg in acid soils under rubber. Wide variation in soil K, Ca and Mg was recorded between the samples. Numerically higher values were obtained for available K with ammonium acetate extraction. For Ca and Mg more quantity was extracted with Morgans extractant. Correlations between soil test values and corresponding leaf nutrient concentrations indicated that both extractants are equally good for evaluating the availability of K and Ca. Considering the non-corrodable nature and being the universal extractant, ammonium acetate was found to be the better choice. A better extractant has to be identified for available Mg.
650			_aAmmonium acetate
650			_aAvailable nutrients
650			_aExchangeable ions
650			_aHevea brasiliensis
650			_aSodium acetate
700			_aJoseph Mercykutty
700			_aKarthikakuttyamma M
700			_aMathew M
942			_cJS
999			_c59033 _d59033