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我国耕地已连续使用了几千年,由于伟大劳动农民掌握着优良的耕种技术,到现在仍能保持着相当的产量。作物每年由土壤吸取的养分是很多的,必须年年设法补充,才能保持长久的产量。在过去旧社会里,仅注意到眼前的生产利润,忽略了基本施肥工作,发生了对土地严重的剥削现象,以致产量逐渐低降。若想恢复原来的生产能力,或再提高产量,增加肥料与肥料的合理施用,是最重要的措施。
The cultivated land in our country has been used continuously for thousands of years. Since the great laborers have good cultivation techniques, they still maintain a considerable yield. The nutrients that the crop draws from the soil each year are many and must be supplemented every year to maintain long-term yields. In the old society in the past, only paying attention to the current production profits, ignoring the basic fertilization work, serious land exploitation occurred, resulting in a gradual decline in output. If you want to restore the original production capacity, or to increase production, increase the rational use of fertilizers and fertilizers, is the most important measure.