Assessment of soil fertility variability for maize production in highland agroecosystems of Peru. - Garcia, Erika; Ccopi, Dennis; Requena-Rojas, Edilson; Sanabria-Quispe, Samuel; Arias-Arredondo, Alberto; Gavino, Esthefany; Azabache, Andres; Pizarro, Samuel (Journal of Ecological Engineering, 2026)