Technical notes Technical notes from the Centre on soil management and organic fertilizers. Documents Nota técnica 1 Acidez de suelos y uso de enmiendas(2014) Causes, effects and management of soil acidity, and the use of amendments. In Spanish.PDF · 384 KBNota técnica 2 Elaboración de abonos orgánicos en Costa Rica(2015) How organic fertilizers are made in Costa Rica. In Spanish.PDF · 5,8 MB