冬季温室大棚管理技术
Determination of pH of Soils by Different Methods
PH值与氢离子浓度的关系
Recommended Soil pH and Lime Requirement Tests
SOIL AND WASTE pH
Soil pH and Buffer Index
TEST METHOD FOR THE DETERMINATION OF pH VALUE OF WATER OR SOIL
Handbook of Soil analyze1
GB 6920-86 水质 pH的测定
GB 7467-87 六价铬的测定
