TY - JOUR T1 - Valuation of nutrient losses due to soil erosion in a tropical upland agroecosystem JF - Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist) A1 - Josue, Danilo S. A2 - Mendoza, Teodoro C. LA - English YR - 2001 UL - https://tuklas.up.edu.ph/Record/IPP-00000659057 KW - Soil erosion KW - Environmental degradation KW - Cropping systems ER -