MESSENGER science team members will also be studying the shallow ridges that crisscross Machaut's floor.
“信使号”科学团队也将对这些交错地表的沟槽进行研究。
In Australia, a shallow soil is scraped into ridges on which trees are planted.
在澳大利亚把表层土壤作垄，果树栽在垄上。
Treatments included conventional tillage, subsoiling, straw mulch, tied ridges, shallow pits surface and no tillage.
试验处理包括常规耕作、深松、秸秆覆盖、垄作、浅坑及免耕。
Treatments included conventional tillage, subsoiling, straw mulch, tied ridges, shallow pits surface and no tillage.
试验处理包括常规耕作、深松、秸秆覆盖、垄作、浅坑及免耕。
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