Subject:
garden pea seed production clubroot disease soil erosion bacterial wilt potato pine needle mulch weeds strawberry true potato seeds Phaseolus vulgaris biological nitrogen fixation piglets chrysanthemum snap bean banana cultivars bee pollination yam flour sweetpotato pesticides heavy metals vegetables insects root development root knot nematode peanut brittle sweet pepper medicinal plants cytokine mimetic properties rubber black stripe disease lakatan citrus durian oil palm