4.高粱对土壤的要求。高粱对土壤的适应力很强,无论是砂壤土,粘性土,还是高燥地、低洼地均可种植。但是,由于高粱吸肥力较强,在过于瘠薄的土壤上栽培时,必须施肥才能获得丰产。高粱对土壤虽然不甚选择,但是由于品种的不同,对土壤也有不同的要求。产量较高的品种,大多适种于土层深厚,肥力较高的土壤。产量较低的品种,大多耐瘠薄,因此土层较薄 Sorghum soil requirements. Sorghum adaptability to the soil is very strong, whether it is sandy loam, clay, or dry, low-lying can be planted. However, because sorghum is highly fertile, it is necessary to fertilize it to yield high yields when it is grown on barren soils. Although sorghum is less selective for soil, it has different requirements for soils because of the variety. Higher yield varieties, mostly suitable for planting deep soil, fertile soil. The lower yield varieties, mostly resistant barren, so the soil is thin