目前我省将全面开民第二次土壤普查工作,特摘录整理美国、日本、朝鲜等几个国家的土壤调查情况,供参考。一、美国土壤调查概述美国土壤调查始于1899年,当时的调查范围仅在康涅狄克等四个州内的四个地区。目的是为了解决农业生产上一些实际问题,例如:某一地区是否适宜种某种作物,需要增施多少肥料,土壤有无水、盐、酸问题等等。麻省康涅狄克河流域早期引种苏门答腊烟叶,就是经过土壤调查才进行的。随着土壤科学的发展和人们要求对土壤有更多的 At present, our province will fully open the second soil survey of the people and extract the soil survey conducted in several countries such as the United States, Japan and North Korea for reference. First, the United States Soil Survey Overview The United States soil survey began in 1899, the survey was only in four states such as Connecticut, four regions. The purpose is to solve some practical problems in agricultural production. For example, whether a certain area is suitable for planting a certain crop, how much fertilizer needs to be added, whether the soil has water, salt, or acid problems, and so on. Early introduction of Sumatran tobacco leafs in the Connecticut River basin in Massachusetts was carried out through a soil survey. With the development of soil science and people demand more on the soil