浙江省250米土壤有机质栅格图（1990年）

本数字化土壤有机质含量图是以全国第二次土壤普查资料1∶50 万浙江省土壤图经过数字化、投影变换、属性赋值、矢量栅格转换获得。该图土壤有机质属性含量来源于中国土种志，反映了二普时期浙江省有机质含量的分布规律。可作为编制浙江省土壤资源图和肥力图的基础，也可为浙江省土壤利用改良区划、农业区划、自然区划等提供科学依据，可供农林部门及科研、教学单位参考。

This digitalized soil organic matter content map was generated by processing the 1:500000 scale soil map of Zhejiang Province — which was compiled using data from the Second National Soil Survey — through digitization, projection transformation, attribute assignment, and vector-to-raster conversion. The soil organic matter content attribute data of this map is sourced from the *Chinese Soil Species Annals*, and it reflects the spatial distribution pattern of soil organic matter content in Zhejiang Province during the period of the Second National Soil Survey. It can serve as the foundational data for compiling soil resource maps and soil fertility maps of Zhejiang Province, and provide scientific evidence for regionalization works including soil utilization and improvement zoning, agricultural regionalization, and natural regionalization in the province. This dataset can also be referenced by agricultural and forestry departments, scientific research institutions and educational institutions.