Illinois Soil Nitrogen Test measures microbial nitrogen
Monday, May 11, 2009 - 10:35
in Earth & Climate
MADISON, WI, May 4, 2009--Contrary to the prevailing view, cereal crops derive the majority of their nitrogen from the soil, not fertilizer. Soils differ considerably in microbial activities that determine nitrogen-supplying power, and these differences must be taken into account if nitrogen fertilizers are to be used efficiently.