Review of the principles and management implications related to nitrogen in the soil-plant-water system.

Nitrogen is an essential element for plant growth and development and a key agricultural input-but in excess it can lead to a host of problems for human and eco

Biological nitrogen fixation. Why, when an how to measure nitrogen fixation. Analysis of nitrogen. Nitrogen Balance Method. Nitrogen Difference method. Ureide (

North American Agroforestry Explore the many benefits of alternative land-use systems with this incisive resource Humanity has become a victim of its own succes

Nitrogen is one of the most critical elements for all life forms. In agricultural systems it is essential for the production of crops for feed, food, and fiber.