phosphorus powder
1.(3) 150kg/mu of slag powder of yellow phosphorus or 100kg/mu of lime could be used as the lower limit for controlling pH drop of acid paddy bellow pH4,and 300kg/mu of lime as the upper limit for improving the acid paddy.
2.The nucleic acid content in the de-fating tussah pupa powder that is determined by fixing phosphorus method is listed as follows:the content of DNA is 1.25 %,the content of RNA is 2.37 %,the ratio between RNA and DNA is 2:1,the total content of nucleic acid is 3 %~4 %;
