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Economics of black wattle plantations in sloping lands of Nilgiris

Economics of black wattle plantations in sloping lands of Nilgiris

Indian Journal of Soil Conservation 23(1): 69-73

A study was conducted in the sloping lands of the Nilgiris in Tamil Nadu to compare the economics of 4 intercropping treatments (black wattle (Acacia mearnsii) + grass/legume (Pennisetum clandestinum/Trifolium repens) mixture; black wattle + scented geranium (Pelargonium graveolens); black wattle + potato; and black wattle + potato in the first year only (a hypothetical treatment based on first year data from the preceding treatment)) with that of growing pure tree species (black wattle alone). Black wattle was planted at 2x2 m in 1980, alternate rows were felled in 1987 and the final felling was in 1991. Grass/legume harvests were in 1981-86 and 1988-89, scented geranium in 1980-83 and 1988-89, and potatoes in 1980-82 and 1988-89. The economic analysis was done for the whole rotation period of 12 yr (1980-91) using as criteria benefit-cost ratio, net present worth and payback period for discounts of 10, 15 and 20%, and internal rate of return. All the intercropping treatments except for black wattle + potato (not first year only) were more economically efficient than pure black wattle.

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