first plowing 中文意思是什麼
first plowing
解釋
初耕翻-
Other factors that were found to have positive effects on soil nutrients include the multiple cropping index and the practice of plowing stalks back into the land. these findings lead to several policy recommendations. first, it shows that economic variables are very important in determining changes in soil fertility, and therefore the theory and method of economics should be taken seriously by soil scientists
然後，根據理論預期以及單因素分析結果，我們建立了土壤肥力變化的社會經濟及政策影響因素模型，分別採取差分和固定效應兩種具體模型形式，對各種可能的社會經濟及政策因素對土壤肥力變化影響的方向和程度做了定量估計。 -
Usually ha managed to find plenty of work to tide him over spring and the first month of summer, helping with lambing and plowing
一般情況下，他還勉強能找到不少活，如幫人接羊羔，犁犁田之類的事，以此來維持春閑和初夏時的生機。
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