Nitrogen fertilizer applied to crops lingers in the soil and leaks out as nitrate for decades towards groundwater -- "much longer than previously thought," scientists in France and at the University of Calgary say in a new study.Thirty years after synthetic nitrogen fertilizer had been applied to crops in 1982, about 15 percent of the fertilizer N still remained in soil organic matter, the scientists found.
Fuente : http://www.eurekalert.org/pub_releases/2013-10/uoc...
Fuente : http://www.eurekalert.org/pub_releases/2013-10/uoc...