Long-term effect of tillage and manure application on soil organic fractions and crop performance under Sudano-Sahelian conditions

摘要: Abstract Human-induced degradation of natural resources in general and soil particular, is a major problem many regions, including the Sudano-Sahelian zone. The combined effects tillage manure application on Lixisol properties crop performance were investigated at Saria, Burkina Faso, to find efficient management practices improve fertility. A randomized block design with four treatments (hand hoeing only, hand hoeing+manure, ploughing oxen ploughing+manure) three replications was started 1990. Ten years later, total organic (SOC), particulate matter C mineralization measured. Initial SOC concentration 4 mg/g dropped 2.1 mg/g ploughed plots without 2.5 mg/g hoed manure. Manure addition mitigated decrease even built up plots, where it increased 5.8 mg/g soil. had large effect fractions which stored. In amount stored physical particles >0.25 mm, while maximum finer fractions. topsoil, resulted higher than no However, 15–25 cm layer, particularly September, greater Crop yields highest ploughed+manure lowest We conclude that applying annually mitigates negative related therefore can contribute sustainability agricultural system