Laserfiche WebLink
• TABLE 92.2 <br />Parameter, Procedure, and Reference List <br />for Soil Fertility Analyses <br />1991-1992 Field Seasons <br />Parameter-Units Procedures-Ref erences <br />Sample preparation <br />pH (determination using saturated paste) <br />• Conductivity of saturation extract in <br />mmhos/cm et 25°C <br />Organic Carbon in percent <br />Particle size enaLysis in X send, <br />silt, and clay <br />Textural clessif ication <br />Nitrate Nitrogen in ppm <br />Ammonium Nitrogen in ppm <br />• Phosphorus in ppm <br />Samples were dried at less than 35°C <br />end crushed to p~qs a 10 mesh sieve. <br />Excessive grinding of spoil Nas avoided. <br />Rock fragments in soil samples Mere <br />removed. <br />U.S. Salinity Lab (1969), Nethod 21x, <br />p. 102. <br />Rhoades (1982), Method 10-3.3. <br />Nelson and Sommers (1982), Section <br />29-3.5.3 <br />Gee and Bauder (1986), Method 15,-5. <br />USDA (1951), P. 209. <br />Keeney end Nelson (1982), Methods <br />33-3.2. 33-8.2- and 33-8.3. <br />Keeney end Nelson (1982), Methods <br />33 -3.2, 33-7.2, end 33-7.3. <br />Olsen and Sommers (1982), Method <br />24-5.4. <br />9 <br />