Preceding crops to spring turnip rape and spring rape

abonos nitrogenados application rates avena sativa brassica campestris brassica napus crude fat cultivos de invierno culture d'hiver dose d'application fallow systems graisse brute grasa bruta hordeum vulgare nitrogen fertilizers ph pisum sativum production data rendement rendimiento rotation culturale rotational cropping secale cereale seed semence semillas sistemas con barbecho soil types triticum type de sol winter crops yields