Recommended Chemical Soil Test Procedures for the North Central Region
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This publication is a revision of North Central Regional Research Publication No. 221 (NCR221).
For more than a century, soil and plant scientists have been developing methods for determining the levels of plant-available nutrients in soils.
Over the past 30 years, the NCR-13 Soil Testing and Plant Analysis committee members have worked hard at standardizing the procedures of soil testing laboratories with which they are associated. As a result of these activities, the committee arrived at the recommended procedures for soil tests.
- Soil sample preparation
- Standard soil scoop
- Soil extraction
- Lime requirements
- Soil organic matter
- Soil salinity
- Greenhouse root media
- Laboratory quality assurance program