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incisnountainlOiL <br /> 41 <br /> Table 30. Soil analysis methods. <br /> Parameter Reference <br /> pH Diagnosis and Improvement of <br /> Saline and Alkali boils, AgriciRture <br /> Handbook No. 60, Method 21a, <br /> 1969. <br /> Conductance Diagnosis and Improvement of <br /> Saline and Alkali Soils, Agriculture <br /> Handbook No. 60, Method 4b, 1969. <br /> Soluble Sodium, Calcium, Magnesium Diagnosis and Improvement of <br /> Saline and Alkali Soils, Agriculture <br /> Handbook No. 60, Method 3a, 1969. <br /> Analytical Methods for Atomic <br /> Absorption Spectrophotometry, <br /> Perkin Elmer Corp., 1976. <br /> Organic Matter Methods of Soil Analysis, <br /> Agronomy No. 9, Part 2, 2nd <br /> Edition. Method 29-3.5.s, 1982. <br /> Particle Size Analysis Methods of Soil Analysis, <br /> Agronomy No. 9, Part 1, Method <br /> 43-5, 1973. <br />