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