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单词 plough pan
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plough pan
plough pan n. Agriculture a compacted layer in cultivated soil resulting from repeated ploughing.
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the world > food and drink > farming > cultivation or tillage > breaking up land > ploughing > [noun] > compacted sub-soil due to repeated ploughing
plough pan1883
1883 W. T. Lawrence Princ. Agric. i. 30 By repeatedly ploughing at about the same depth, their downward progress [sc. that of roots] is checked by the formation of a hard bottom called a plough-pan.
1924 J. A. S. Watson & J. A. More Agric. v. 86 Subsoiling is absolutely necessary where a plough-pan has been formed.
1991 Garden (Royal Hort. Soc.) Jan. 23/1 The most likely problem, when replanting former orchard land, is soil compaction: either deep compaction, such as a plough pan, or surface compaction.
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更新时间:2024/11/11 1:39:08