[tag=NN] [word=□]
[tag=NN] [word=volatilization]
The key hazard associated with the use of solid urea to fertilize citrus is loss of N through ammonia volatilization following surface application . The correct injection port temperature is important to assure complete sample volatilization and to eliminate contamination or ' memory effects ' in subsequent GC injections . We report measurements of Se isotope fractionation during selenate reduction , selenite sorption , oxidation of reduced Se in soils , and Se volatilization by algae and soil samples . Loss of N by ammonia volatilization following surface application of ammonium nitrate is not considered to be significant unless the soil pH is above 7 . Soil recapitalization is the replenishment of soil fertility as nutrients are added to the soil ( inflows ) to replace nutrients removed from the soil ( outflows ) by harvests , erosion , runoff , leaching , N volatilization , and denitrification .