Kamau, M.Smale, M.Mutua, M2026-05-132026-05-132014https://link.springer.com/article/10.1007/s12571-014-0398-5http://41.89.96.81:4000/handle/123456789/3714enFarmersoil fertilityFarmer demand for soil fertility management practices in Kenya’s grain basketArticle