Annual nitrogen (N), phosphorus (P), and potassium (K) flows in agriculture in The Netherlands were identified and quantified in 1990, with special emphasis on pig production. Also, the effects that various management strategies in pig production have on NPK emission in 1990 were compared using a static deterministic simulation model. Ammonia emission from pig production in 1990 (60.9 Gg N) exc...

Large nitrogen (N) losses during fertilization in agricultural production may result energy wastage, soil and water contamination, potentially influence crop development. Thus, with the help of a 15N-labeled tracer, we carried out field monitoring analysis NH3 emissions long-term (9-year) conservation tillage agroecosystem Mollisols northeast China, order to determine whether no-tillage regime ...

Ammonia emission from animal production is a major environmental problem and has impacts on the animal health and working environment inside production houses. Ammonia is formed in manure by the enzymatic degradation of urinary urea and catalyzed by urease that is present in feces. We have determined and compared the urease activity in feces and manure (a urine and feces mixture) from pigs and ...

Contemporary agriculture is shifting from a single-goal to a multi-goal strategy, which in turn requires choosing best management practice (BMP) based on an assessment of the biogeochemical effects of management alternatives. The bottleneck is the capacity of predicting the simultaneous effects of different management practice scenarios on multiple goals and choosing BMP among scenarios. The de...

Nitrogen (N) is an essential plant nutrient, therefore, N-deficient soils affect growth and development. The excessive unwise application of N fertilizers result in nutrient losses lower use efficiency that leads to the low crop productivity. Ammonia volatilization causes a major loss after fertilization environmental pollution. This experiment was conducted evaluate effectiveness coating uncoa...

Abstract. Atmospheric ammonia (NH3) is a critical component of our atmosphere that contributes to air quality degradation and reactive nitrogen deposition; however, knowledge NH3 in urban environments remains limited. Year-long ambient related species were measured for concentrations the isotopic compositions (?15N) particulate ammonium (pNH4+) understand temporal sources chemistry northeastern...