干地相关论文
本文研究了人工羊草草地干、鲜地上生物量的比值,结果表明:从羊草的抽穗期(6月23日)至果后营养期(9月12日),其干、鲜地上生物量的......
Recurrent droughts and occasional floods are the facts of life in drylands. The presence of innumerable societies in des......
