Pathways to agroecological intensification of soil fertility management by smallholder farmers in the Andean highlands

Fonte, Steven J.; Vanek, Steven J.; Oyarzun, Pedro; Parsa, Soroush; Quintero, Diana Carolina; Rao, Idupulapati M.; Lavelle, Patrick. 2012. Pathways to agroecological intensification of soil fertility management by smallholder farmers in the Andean highlands . Advances in Agronomy 116: 125-184.