Abstract
The soil microbial biomass of soil is being increa sing recognized as sensitive indicator of soil quality. Its knowledge is fundamental for sustainab le environment management. The soil microbial biomass C, N and P were studied in four different l and uses of dry tropical forest of Udaipur, Rajasth an, Western India to assess the influence of abiotic, p hysico-chemical variables and difference in differe nt land uses (mixed forest, butea plantation, grasslan d and agricultural lands) on the seasonal variation in soil microbial biomass. Microbial biomass C, N and P were highest during rainy season and lowest durin g winter in all the four different land use with the exception of microbial N which was lowest in summer in mixed forest and butea plantation. Microbial biomas s C and N were shown to be significantly correlated to the abiotic and physico-chemical variables of th e soil, such as soil temperature, relative humidity , soil moisture, organic C, total N, clay, and pH. Present study clearly shows that land use has a significan t effect on microbial biomass C, N and P in soil by a ltering natural soil characteristics under the same ecological conditions.
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