Loam is a soil with roughly equal proportions of clay, sand and silt.

壤土是由大约等份的黏土、沙和粉砂合成的。

《牛津词典》

Little interval of water dropper should be chosen for sand, but large interval of water dropper can be chosen for loam soil.

对于砂土，应选择小的滴头间距，而对于壤土则可以选择大的滴头间距。

youdao

Soil quality is not high, for the sand and sandy loam .

土壤品质不高，为砂土和砂质壤土。

youdao

The soil should be full of loam, a mixture of sand, silt,clay and organic material.

VOA: special.2009.04.07