种植间距对加纳几内亚草原带雨养条件下豇豆 (Vigna unguiculata (L.) Walp.)品种生长及产量的影响研究 《Advances in Agriculture》：Influence of Spacing on Growth and Yield of Cowpea (Vigna unguiculata (L.) Walp.) Varieties Under Rainfed in ...