Figure 5

Effect of tillage, green manure and residue management practices on alkaline phosphatase within aggregates after five years of rice–wheat cropping system. PTRW0-puddled transplanted rice with no wheat straw, PTRW25-puddled transplanted rice with 25% anchored wheat straw retained, GM-Green manure, CTWR0-conventional tillage wheat with rice straw removed, ZTWR0-zero tillage wheat with rice straw removed, ZTWR100-ZTW with rice straw retained as surface mulch. Vertical bars are the standard errors of the mean (p < 0.05). The values above the vertical bars represent least significant difference test.