Rodney T. Venterea

TL;DR: Evidence that it promotes C sequestration is not compelling, because in essentially all cases where conservation tillage was found to sequester C, soils were only sampled to a depth of 30 cm or less, even though crop roots often extend much deeper.

TL;DR: A global meta-analysis using 5,463 paired yield observations from 610 studies to compare no-till, the original and central concept of conservation agriculture, with conventional tillage practices across 48 crops and 63 countries indicates that the potential contribution of no-Till to the sustainable intensification of agriculture is more limited than often assumed.

TL;DR: The authors conducted a meta-analysis to evaluate the influence of various crop and environmental variables on no-till relative to conventional tillage yields using data obtained from peer-reviewed publications (678 studies with 6005 paired observations, representing 50 crops and 63 countries).

TL;DR: Quantitatively synthesize studies on the short- and long-term impact of NT/RT on N2 O emissions in humid and dry climatic zones with emissions expressed on both an area- and crop yield-scaled basis and recommends deep placement of fertilizer-N is recommended when implementing NT/ RT.