How should soil samples be prepared for analysis?
ASL Soil Processing Facilities are located at the Annex, ground floor level of the Kenzo Hemmi Bldg. All requests for the use of these facilities must be e-mailed to l.molina@cgiar.org, with cc to a.boncajes@cgiar.org at least one week before the date of use. Refer to the Guidelines in using ASL Soil Processing Facilities and consult a.boncajes@cgiar.org for any assistance needed. 1. For pH, EC, exchangeable bases, CEC, particle size analysis, available P, K, and B requiring coarse samples (2 mm ,# 10 mesh): The soil required for normal analytical work is fine earth or soil that has been air-dried, crushed and passed through a 2-mm sieve to remove stones, twigs, leaves, stems and roots. Dried soil should be ground to 2 mm size using the Rukhuhia grinder (RG) located in Soil Grinding Room (Rm.148). (available at ASL).
