The effect of forecrop, soil tillage and herbicides on weed infestation rate and on winter wheat yield

cero-labranza clima climat climate cultivos de invierno culture d'hiver essai helianthus annuus herbicidas herbicide herbicides labranza malezas mauvaise herbe meteorological observations pisum sativum pruebas rendement rendimiento rotation culturale rotational cropping tillage travail du sol trials triticum aestivum weeds winter crops yields zero tillage