cultivated horizon

基本解釋

The cultivated horizon was too shallow and machinery cultivation can increase thickness of cultivated horizon effectively.
耕層土壤厚度過淺，機(jī)耕可有效增加耕層厚度；
Soil samples of cultivated horizon from Gongpeng town were analyzed in 1998 and the results were compared with that in 1990.
1998年對黑土區(qū)（弓棚鎮(zhèn)）的耕層土壤養(yǎng)分進(jìn)行分析，并與1990年該區(qū)土壤的化驗(yàn)結(jié)果進(jìn)行了比較。
Therefore, "wave type" section cultivated horizon may occur drier phenomenon much easier than "flat type" section. This may be the main reason why drier phenomena easily happen in the black soil.
“波浪型”剖面耕層土壤比“平面型”剖面更容易發(fā)生干旱現(xiàn)象，這可能是黑土區(qū)土壤易出現(xiàn)干旱現(xiàn)象的主要原因。