Influence of different population densities of Portulaca oleracea L. on growth and yield of transplanted onion Allium cepa L.Influence of different population densities of Portulaca oleracea L. on growth and yield of transplanted onion Allium cepa L. Portulaca oleracea is one of the weeds of onion in the Philippines. Its negative impact on growth and yield, however, ... Read FullRead Full