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我县有山沙土33万亩,主要分布在片麻岩地区。山沙土的土层厚度一般为15～25厘米,土壤中有机质及有效养分含量较低,影响作物产量的提高。单靠深翻难以达到增厚活土层的目的;同时,翻得过深,易使生土进入耕作层,不利于作物生长。近些年来,我县广大农户对山沙土采取深松措施,这样能够打破犁底层,活化半风化母质层,有利于作物根系下扎。此外,又可为翌年深翻,增加活土层,疏松耕层,促进土壤熟化创造有利条件。
My county has 331000 acres of sandy soil, mainly in the gneiss area. The thickness of the soil is usually between 15 and 25 centimeters. The content of organic matter and available nutrients in the soil is low, which affects the increase of crop yield. It is hard to reach the goal of thickening the soil layer by deep deep turning alone. At the same time, turning over too deep can easily lead the soil into the tillage layer, which is not conducive to crop growth. In recent years, the majority of farmers in our county take deep-seated measures to the sandy soil, so as to break the plow bottom and activate the semi-weathered mother layer, which is beneficial to the crop root system. In addition, it can also create favorable conditions for deep-sowing the following year, increasing living soil layers, loosening tillage layers and promoting soil ripening.