Soil testing: Sampling, Correlation, Calibration and Interpretation ; proceedings - Symposium on Soil Testing. Sampling Correlation, Cablibration and Interpretation. Madison Soil Science Society of America, Dec.1-5,1987. (Madison Soil Science Society of America Inc., 1987)
Keywords: J.R.Brown; Brown, J.R., ed; Soil testing,Soil fertility,Sampling(Statistics)