The impact of tillage systems and crop residues on microbial mass and soil structure stability indices

Aim of study: This research investigated the effects management practices, including plant residues and tillage on soil stability indices, microbial biomass carbon, number bacteria.Area Northern Khorasan Province, Iran.Material methods: study explored three year-old systems conventional (CT), minimum (MT), no-tillage (NT) at levels 0, 40, 70% physical microbiological properties for a rotation years (wheat, canola, wheat). Variables measured in this included whole index, normalized percentage aggregate destruction (PAD), bacteria, carbon.Main results: Management practices could affect variables, such as structure well bacteria. The results also showed that soils higher were more resistant to degradation. In addition, by reducing adding residues, PAD index decreased significantly. NT MT improved indices significantly increased bacteria carbon contrast CT, what be attributed organic matter.Research highlights: Reduced potential enhancing quality only through improving stability. Therefore, with residue retention was found suitable improve sustainability population.