R3-8003 Oejebyn. Results of 35 years from a long-term field trial with a "complete" design

agricultural lime arable soils avenas avoine barley capa arable del suelo cebada chaux agricole colza couche arable essai fallow systems farmyard manure habitat improvement liquid manures mejoramiento del habitat oats orge papa pomme de terre potassium sulphate potatoes pruebas purin rape rendement rendimiento rotational cropping sistemas con barbecho sol arable subsoil subsuelo sulfate de potasse sulfato de potasio superfosfato superphosphate tierras cultivables top soil trials yields