Losses of nutrients at Vagle

abonos agua de drenaje arable soils avenas avoine azote barley boulder clay soils calcio calcium cebada chlorides chlorure cloruros cropping systems drainage water eau de drainage engrais engrais organique escorrentia fertilizers fosforo ley farming magnesio magnesium nitrogen oats orge ph phosphore phosphorus potasio potassium precipitation ruissellement runoff sistemas de cultivo sodio sodium sol arable sulfate sulfatos sulphates tierras cultivables