Long-Term Organic Inputs Determine Soil Productivity Better in Sorghum-Cowpea Rotation Than in Sorghum Monoculture

Information on long-term fertilization combined with crop rotation can contribute to better management of West African Lixisols. There is little information how organic inputs influence soil chemical properties under cereal monoculture versus a legume. Here, we investigated regimes emphasis in sorghum compared sorghum-cowpea rotation. The field trial Saria Burkina Faso, which has been operation since 1960, was used for this purpose. Soils were sampled at the 0-20 cm depth determine their C, total N, P, mineral available pHwater, exchangeable basic cations, and cation exchange capacity. best exhibited application 40 t ha-1 manure. Recycling residues led decrease N P but maintained higher level exclusive fertilization. Organic determined yield (R2 = 0.89) than monoculture. Our results show that productivity studied Lixisol requires an manure more 5 In addition, including legume regular recycling necessary.