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长山药的打洞栽培技术山药在江苏省沛县有悠久的栽培历史。传统的挖沟栽培方法，对土壤要求严格（沙质土壤），劳动强度大，费时费工。山药产量低，质量差，病害重，连作年限短，只限于局部地区和有强壮劳力的农户零星种植，不适宜大面积发展和机械化栽培，另外，种植过山...
Long Yam hole cultivation techniques Yam in Peixian County, Jiangsu Province has a long history of cultivation. Traditional trenching cultivation methods, demanding on the soil (sandy soil), labor-intensive, time-consuming and laborious. Yam production is low, poor quality, heavy disease, even for a short period of time, limited to some areas and strong labor sporadic farmers, unsuitable for large-scale development and mechanized cultivation, the other, planting over the mountain ...