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一、筹备工作黑龙江省垦区的3,000多万亩耕地的土壤普查分四个阶段:(一)准备阶段;(二)调查阶段(外业);(三)土壤化验,制图,资料整理阶段(内业);(四)总结阶段。土壤化验工作,对评价土壤肥力,确定施肥指标,土壤改良,农田基本建设,都有直接的关系。土壤化验结果的准确与否、速度如何,都将直接影响土壤普查成果的质量和应用价值。所以,这是一项关键性工作。在完成3,000万亩耕地的土壤普查的同时,约采集了各种土壤样本5万个,基本做到了垦区每个生产队的土地,部分预垦荒地都采了土样,化验了酸碱度,有机质,全氮,全磷,水解氮,速效磷,速效钾、部
I. Preparatory work The soil census of more than 30 million mu of arable land in the reclamation area of Heilongjiang Province is divided into four phases: (a) the preparatory phase; (b) the investigation phase (the field); (c) the soil testing, mapping and data collation phases Industry); (four) summary stage. Soil testing work, evaluation of soil fertility, determine fertilization indicators, soil improvement, farmland infrastructure, have a direct relationship. The accuracy of the soil test results, how the speed will directly affect the quality and application of soil census results. So, this is a key job. At the same time of completing the soil census of 30 million mu of arable land, about 50,000 samples of various kinds of soil were collected, and basically the land of each production team in the reclamation area was acquired. Some of the reclaimed wasteland was sampled with soil samples and the soil pH, organic matter, Total nitrogen, total phosphorus, hydrolyzed nitrogen, available phosphorus, available potassium, Ministry