【Objective】Application of organic manure or material may affect soil fertility and soil microbial community structure. However, uneven distribution of the organic materials applied in the soil may aggravate spatial heterogeneity of the soil, and hence affect structure and functions of the soil biota therein.To determine how much organic materials will affect spatial heterogeneity of the soil, an in-lab soil incubation experiment was conducted for observation of how soil protozoa and nematode community struc...