Proper Timing And Placement Of Fertilizer

1306 WordsDec 1, 20156 Pages
Proper timing and placement of fertilizer, development of more efficient crop varieties, and proper irrigation are among some of the other solutions to improve the efficiency of nitrogen uptake (Robertson & Vitousek, 2009). Considering the widespread use of fertilizers and huge area of arable land in use, one particularly promising solution seems to be the use of fertilizers coated with nitrification inhibitors. A study measuring the effect of dicyandiamide (DCD), which limits the conversion of NH4+ to NO3- , on a grazed pasture demonstrated a 68 percent reduction in nitrate leaching as a result of its application (Di & Cameron, 2005). In addition to nitrogen releases, agricultural activities contribute significant amounts of carbon dioxide and methane to the environment, both of which are GHGs. Within this sector, methane enters the atmosphere mainly through enteric fermentation by ruminants, manure, and rice paddies. Without taking into account emissions from fossil fuel use, agriculture is responsible for about one third of global net carbon dioxide emissions as a result of deforestation, burning of biomass, and draining of wetlands (Johnson, Franzluebbers, Weyers, & Reicosky, 2007). Carbon dioxide emissions associated with fossil fuels on the farm are mostly due to diesel combustion from machinery used for planting, tilling, and fertilizer and pesticide application. Production and transportation of agricultural inputs should also be considered to account for

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