Gagliardi, P. M.Delgado, Jorge A.Rau, E. J.Fry, R.Figueroa, U.Gross, C.Cueto-Wong, J.Shaffer, M. J.Kowalski, K.Neer, D.Sotomayor-Ramirez, D.Alwang, Jeffrey R.Monar, CarlosEscudero, Luis O.Saavedra Rivera, A. K.2016-04-192016-04-1920114975_Nitrogen_Index_4_4_User_Manual_final.pdfhttp://hdl.handle.net/10919/69932User manual for a web-based tool to help farmers make optimal decisions about nitrogen application in degraded and other lands.application/pdfenIn CopyrightSoil fertilityFertilizationNitrogenDecision toolSANREMBoliviaEcuadorField ScaleHandbook