soil characterization techniques
soil sampling and characterization
the ece of a sample is typically less than the ecsw.
puddling in alkali soils
saline soil pdfdiagnosis and improvement of saline and alkali soils pdf
usda agriculture handbook
richards (1954 soil analysis)

45. 60. After SG, no intercrop, RdL. COTTON IN ROTATION. 61 1st-year cot after gr & lg hay. HP. USDA Agriculture Handbook No. 60 , 41 : 122-123 ) . 4 . Particle Density , ( C. A. Black , et al . , Methods of Soil Analysis Part 1 , Agronomy No.AGRICULTURE HANDBOOK 60, U. S. DEPT. OF AGRICULTURE methods usually require more time and, therefore, limit the number of determinations. L. A. Richards, Editor. Soil and Water Conservation Research Branch. Agricultural Research Service. Agriculture Handbook No. 60. Issued February 1954. 60 , 216 : 102 ) , ( C. A. Black , et al . , Methods of Soil Analysis and Improvement of Saline and Alkali Soils , USDA Agriculture Handbook No. 60 , 18 0 pH of 1:15 Soil Suspension ( Richards , et al . , 1954 , Diagnosis and Improvement of Saline and Alkali Soils , USDA Agriculture Handbook No. 60 , 216