A long-term field experiment was carried out to study the effect of fertilization on the organo-mineral complexation and the combined forms of humus of phaeozem in Jilin Province, China.
摘要利用长期验研究了施肥对土有机无机复合质结合形态的影响。
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Although Alabama is 27 percent Black, only one of its seven congressional districts-the one that includes Birmingham-has a Black majority, despite large Black populations concentrated in Mobile and in the " Black Belt" counties that stretch across the state.
尽管阿拉巴马州27%的人口是黑人,大量黑人人口集在莫比尔和横跨全州的“黑土带”所在县,但在其七个会选区,包括伯明翰在内,只有一个选区黑人占多数。