The American Society of Agronomy (ASA) articles

Nitrogen fixation is one of the best examples of cooperation in nature. Soil microbes – naturally occurring bacteria in the soil – work with plants to pull nitrogen from the air. They turn the nitrogen into a form the plant is able to use. In return, the plant lets the microbes eat some of the sugars it makes.

Faba beans (also called fava beans) are one example of plants that work with soil microbes in this manner. These dried beans are part of a food group kn

Land application of animal manures such as poultry litter is a common practice, especially in states with surplus manure. Past studies have shown that animal manure may contain estrogens, which are classified as endocrine-disrupting chemicals and may pose a threat to aquatic and wildlife species. We evaluated the concentrations of estrogens in surface runoff from experimental plots (5 × 12 m each) receiving raw and pelletized poultry litter. We evaluated the free (estrone, E1; 17β-