Studies of humic acid extracts from lenoardite (soft coal) and peat sometimes report positive effects on plant growth and nutrient acquisition particularly when work is done in hydroponic culture or foliar feeding techniques are used. Many studies show little or no benefit when humates are applied to the field at recommended rates.The relative costs of these materials should be compared against other strategies to improve active organic matter or increase micronutrient availability.
These resources are brought to you by the Cooperative Extension System and your Local Institution
Welcome
eXtension is an interactive learning environment delivering the best, most researched knowledge from the smartest land-grant university minds across America.
eXtension: more mind reach
Have a question? Try asking one of our Experts
Have a specific question? Try asking one of our Experts
Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.
This resource area was created by the: Organic Agriculture community
Resource Area Feeds
In This Resource Area
Farming Systems
General Topics
- Introduction to Organic Agriculture
- Certification
- Cover Cropping
- Insect Management
- Marketing and Food Systems
- Plant Breeding
- Plant Disease Management
- Research in Organic Farming Systems
- Seeds and Seed Production
- Soil and Fertility Management
- Weed Management
Webinars and Videos
Newsletter
