露地土壤
露地土壤
本试验结果表明:在地膜覆盖条件下细菌、放线菌、真菌等数量增加。
The smooth Snow Queen feature is strongly suspected to be ice originally just under the soil, uncovered by the thruster rockets as Phoenix set down on the north polar plains of Mars.因为冰后具有很平滑的表面,这也让大家很怀疑它本来是位在表土之下,当凤凰号降落在火星北极平原时,被火箭的喷气给清出来。