Effect of tillage and mulch on the emergence and survival of weeds in sweet corn

amaranthus amaranthus retroflexus atrazina atrazine buried seeds cero-labranza chemical control chenopodium chenopodium album cubrimiento del suelo digitaria digitaria sanguinalis glifosato glyphosate graine integrated control lucha integrada lutte chimique metolachlor metolacloro mulching new york nueva york paillage portulaca oleracea seeds semilla taraxacum taraxacum officinale zea mays zero tillage