This publication discusses the many types of fertilizers and soil amendments available for organic plant production. Fertilizer formulations, nutrient availability, and application practices for common organic products are also explained. While the primary focus is on building and maintaining fertile soil, information about how to protect soil and water resources in this context is included.
Adding organic matter is the best way to improve nearly all kinds of soils.
Compost is an acceptable amendment for blueberry plants, but it's important to test it before you apply it. Pay attention to pH and nutrient levels, and watch out for weeds.
Use these tips on how to apply organic amendments
This publication compares composted and uncomposted manure; explains the composting process; describes equipment and strategies for composting; and lists uses, advantages, and drawbacks of compost. Discusses regulations, and briefly mentions methods for composting animal carcasses.
Are you thinking about using manure to fertilize your farm but want more information? Properly managed manure applications recycle nutrients to crops, improve soil quality, and protect water quality. From deciding whether manure is right for your farm to learning how to calibrate manure applications, this publication takes you through the process of fertilizing with manure and other organic amendments.
Predicting Nitrogen Availability from Organic Amendments: laboratory, Field, and Computer Stimulation
A study to improve the ability to predict nitrogen availability from organic soil amendments, including improved accuracy of Nitrogen availability estimates, to target amendment application rates to meet crop N needs.
Organic fertilizers are used to improve soil quality and tilth, and to provide nutrients for plant growth. They provide nitrogen, phosphorus, and potassium, as well as other elements essential for plant development and overall good health.
The OSU Organic Fertilizer and Cover Crop Calculator is available on the Small Farms website. It is a downloadable Excel spreadsheet that allows farmers and gardeners to estimate nitrogen release from organic fertilizers and cover crops. The calculator makes it easy to compare the cost of nutrients from cover crops and fertilizers, and develop a fertilizer plan. This allows you...