000			01340nam a2200205Ia 4500
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100			_aKarthikakuttyyamma M
245		0	_aEffect of continuous cultivation of rubber (Hevea brasiliensis) on morphological features and organic carbon, total nitrogen, phosphorous and potassium contents of soil
260			_bIndian Journal of Natural Rubber Research _c1998
300			_a73-79
520			_aThe effect of continuous cultivation of rubber on soil properties was investigated. Soil morphological properties, organic C and total N, P and K were estimated in the soil profiles samples in plantations in which rubber was grown for more than sixty years. Soil samples from adjoining natural forests were studied for comparison. The study revealed that while the morphological properties were not significantly affected, the total N and K status decreased and the P status increased under continuous rubber cultivation. The study points out that application of higher dose of N and K fertilizers and a reduction of the current rate of P fertilizer are necessary.
650			_aHevea brasiliensis
650			_aMorphological properties
650			_aSoil nutrient status
700			_aAiyer R S
700			_aGeorge V
700			_aPrasannakumari P
700			_aSuresh P R
942			_cJS
999			_c57761 _d57761