Genotypic variation in maize ( <i>Zea mays</i> ) influences rates of soil organic matter mineralization and gross nitrification

Agricultural management practices that increase soil organic matter (SOM), such as no-tillage (NT) with crop residue retention, together varieties best able to source nutrients from SOM, may help reverse degradation and improve nutrient supply uptake by plants in low-input environments of tropical subtropical areas. Here, we screened germplasm representing genetic diversity within maize breeding programmes relation shaping SOM mineralization. Then assessed effects contrasting genotypes on nitrification rates, genotype-by-management history interactions these rates. SOM-C mineralization gross rates varied under different genotypes. Cumulative increased root diameter but decreased increasing length. Strong influences interaction were observed. Overall, higher NT retention. We propose there is potential exploit genotypic variation traits associated programmes. Root length could be used proxies for root–soil driving processes. Development enhanced ability mineralize combined retention build/replenish key sustainable production.