Effect of topography on selected soil properties and nitrogen mineralization in a dry tropical forest
1992
Raghubanshi, A.S.
Soil nutrients and nitrogen mineralization rates were measured along three topographic sequences in a seasonally dry tropical forest. Soil organic C, total N and P decreased downslope. Accumulation of soil organic C and N was related to the P content which, in turn, was controlled by the proportion of fine particles in the soil. Net N mineralization and nitrification rates ranged from 0 to 33 microgram g-1 month-1 and 0 to 19 microgram g-1 month-1, respectively, within the annual cycle and among the topographic positions. Annual mineralization increased from 125 microgram g-1 dry soil at the hillbase to 203 microgram g-1 dry soil at the hilltop. These differences in mineralization rates were obviously related to the distribution of substrate.
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