Short-term application of biochar increases the amount of fertilizer required to obtain potential yield and reduces marginal agronomic efficiency in high phosphorus-fixing soils - Melaku, Tigist; Ambaw, Gebermedihin; Nigussie, Abebe; Woldekirstos, Amsalu Nebiyu; Bekele, Eshetu; Ahmed, Milkiyas (Springer, 2020)