Nitrogen is both an essential nutrient and a pollutant, a byproduct of fossil fuel combustion and a fertilizer that feeds billions, a benefit and a hazard, depending on form, location, and quantity.

NAIROBI, Kenya, December 5, 2011 /PRNewswire/ -- Soil fertilizer subsidy programmes run by many African governments are heading for failure unless Integrated Soil Fertility

The Personal Homepage of Dr. agr.

A U.S. Department of Agriculture (USDA) soil scientist in Colorado is helping farmers grow crops with less nitrogen-based fertilizer.

With citizens' groups seeking government regulation of foul-smelling ammonia emissions from large dairy farms, scientists today reported that adding natural plant extracts to cow feed can reduce levels of the gas by one-third while reducing the need to fortify cow feed with expensive protein supplements.