汉中地区各灌区,均系水旱轮作。灌区土壤由于水稻长期淹灌,土层板结。形成坚实的犁底层。通气不良,宜耕性差,活土层浅,影响作物产量。中央北方地区农业会议以来,特别是在批林整风、批林批孔运动推动下,大打土地翻身仗,深翻土地,平整田亩,增施肥料,改良土壤,建设高产稳产基本农田,一九七三年,全区粮食总产创造了历史最高水平。有人认为:“稻田深翻打破犁底层,漏水跑肥,造成用水紧张,不利农业增产”。稻田能不能深翻,翻多深适宜,什么时间翻好,翻后用水情况怎样,针对灌区存在的这些问题,开展了深翻改土试验,结合调查研究,取得了一些初步结果。 All irrigated areas in Hanzhong are run by drought and drought. Irrigated soil due to long-term flooded paddy soil, soil compaction. Form a solid plow floor. Poor ventilation, poor tillage, shallow soil layer, affecting crop yield. Since the agricultural conference in the northern part of the Central Committee of the Communist Party of China, especially in the fields of rectifying forests and criticizing forests, the Campaign to Bolster Forests and Bolster has fought battles over land, sown fields, ground fields and fertilizers, improved soils, and built basic farmland with high and stable yield. In seven or three years, the region’s total grain output has created the highest level in history. Some people think: “paddy deep plowing plow plow bottom, leaking run fertilizer, resulting in water stress, adverse agricultural increase.” Paddy field can deep plowing, how deep turn more appropriate, what time turned well, turn the water after the situation, for the irrigation district of these problems, carried out deep soil test, combined with the investigation and research, and achieved some preliminary results.