Effects of agricultural practices on soil and microbial biomass carbon, nitrogen and phosphoruscontent:a preliminary case study

摘要

In this study we assessed the C?:?N?:?P ratios in soil and soil microbialbiomass subject to conventional farming and three different organic farmingpractices. The results showed that microbial biomass was P-limited in soilssubject to conventional farming and to organic farming with alfalfa greenmanure. Organic farming with compost amendment showed the best results interms of microbial biomass carbon, nitrogen and phosphorus (CNP).