weed control in organic soybean farms. lambsquarters soybean sprouts on an unencidesed without single non-residual

soybean weed sprouts field agricultural herbicides unencidesed herbicideresistant single nonresidual herbicidefield lambsquarters time farmers should intensify management critical period control cover present fields death crop organic farms transmit diseases pests cause problems harvesting dealing troublesome affected prevent spreading soy grass