Effect of the Climate and Soil Characteristics on the Nitrogen Balance in the North of Algeria

Numerous research elaborated methods of balances of the nourishing elements to develop a lasting agriculture (Parris, 1998). However, the principles that found these balances are very variable, so much to the level of the sought-after precision (choice of the fluxes and parameters took in account and simplifying hypotheses), of the scales of the study (country, exploitation, rotation, parcel), or the length of observation (season, year, etc.) (Van Bol, 2000).