The effect of previous cropping and soil type on the yield response of winter wheat to applied nitrogen

abonos abonos nitrogenados azote barley cebada clay soils continuous cropping cultivo continuo culture continue engrais fertilizers nitrogen nitrogen fertilizers orge papa pomme de terre potatoes rotation culturale rotational cropping sandy soils silty soils soil types sol argileux sol limoneux sol sableux suelo arcilloso suelo arenoso suelo limoso tipos de suelos trigo type de sol wheats