Revised
Editor's notes
The following abstract describes a publication that is only available as a downloadable PDF.
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.
Topics
- Soil sample preparation
- Standard soil scoop
- Soil extraction
- pH
- Lime requirements
- Nitrate-nitrogen
- Phosphorus
- Potassium
- Cations
- Sulfate-sulfur
- Micronutrients
- Zinc
- Iron
- Manganese
- Copper
- Boron
- Chlorides
- Soil organic matter
- Soil salinity
- Greenhouse root media
- Laboratory quality assurance program
Pages
- 72