Effect of different fertilization methods on weed infestation and yielding of spring wheat

abonos nitrogenados abonos organominerales abonos verdes agricultura alternativa agriculture alternative agriculture biodynamique alternative agriculture application methods biodynamic agriculture biofertilisant biofertilizantes biofertilizers compost composts crop yield cultivos de primavera culture de printemps engrais vert escarda facteur de rendement factores de rendimiento farmyard manure fertilisation fertilizer application field experimentation fumier green manures inorganic fertilizers malezas mauvaise herbe nitrogen fertilizers organomineral fertilizers paille paja paja de trigo poland pologne polonia rendement des cultures rendimiento de cultivos soft wheat spring crops straw trigo harinero triticum aestivum weed control weeds wheat straw yield factors