This section specifies a method for the determination of soil available phosphorus using a UV/vis ble spectrophotometer. This section applies to the determination of soil available phosphorus content.
NY/T 1121.7-2014 history
2014NY/T 1121.7-2014 Soil testing.Part 7:Method for determination of available phosphorus in soil
2006NY/T 1121.7-2006 Soil Testing.Part 7:Method for determination of avalible phosphorus in acid soil