Jerome O. Nriagu, Environmental Biogeochemistry (Proc. 2nd Internat. Symposium Environmental Biogeochemistry, Hamilton, Ontario 1975): Vol. I — Carbon, Nitrogen, Phosphorus, Sulfur, and Selenium Cycles (XV, 423 S., 105 Abb., 74 Tab. $20.65). Vol. II — Metals Transfer and Ecological Mass Balances (XV, 373 Seiten, 105 Abb., 69 Tab. $ 20.65). Chichester 1976. J. Wiley & Sons

1978 ◽  
Vol 18 (1) ◽  
pp. 77-77
Author(s):  
W. Schwartz
Keyword(s):  
Mass Balances ◽  
Environmental Biogeochemistry ◽  
Nitrogen Phosphorus

scholarly journals Nitrogen, phosphorus and potassium mass balances in an irrigated quinoa field

2021 ◽  
Author(s):  
Jorge Alvar-Beltrán ◽  
Marco Napoli ◽  
Abdalla Dao ◽  
Amoro Ouattara ◽  
Leonardo Verdi ◽  
...  
Keyword(s):  
Food Production ◽  
Agricultural Research ◽  
Potassium Nitrate ◽  
Sub Saharan Africa ◽  
Environmental Costs ◽  
Mass Balances ◽  
Crop Evapotranspiration ◽  
Sub Saharan ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Sub-Saharan Africa (SSA) needs to increase its food production to alleviate food insecurity exacerbated by climate variability and from increasing food demand. Balancing macronutrient inputs becomes essential for sustaining yields, increasing farmer's income and minimizing environmental costs deriving from fertilizer misuse. The present study calculates the nitrogen (N), phosphorus (P) and potassium (K) mass balances by estimating macronutrient inputs and outputs of a quinoa field cultivated under full and deficit irrigation conditions (100 and 50 % crop evapotranspiration- ETc), in either the presence or absence of N fertilizer (100 and 0 kg ha-1 of N). The emerging findings show that to produce one ton of quinoa biomass (including seeds, stems and leaves) 12.7, 1.6 and 35.5 kg ha-1 of N, P and K, respectively, need to be added into the soil. While N and K are required at medium to fairly high amounts, P is needed in lower amounts. Hence, fertilizers in the form of potassium nitrate (KNO3) are more suitable than those with higher phosphorus concentrations, phosphate (PO43-). Overall, evidences from field experimentations are necessary for integrating farming input recommendations on crop agronomic guidelines, driven by national agricultural research institutions, and for promoting sustainable agriculture in SSA.

scholarly journals Characterization of nitrogen, phosphorus, and potassium mass balances of dairy farms in New York State

2014 ◽  
Vol 97 (12) ◽  
pp. 7614-7632 ◽  
Author(s):  
Sebastian Cela ◽  
Quirine M. Ketterings ◽  
Karl Czymmek ◽  
Melanie Soberon ◽  
Caroline Rasmussen
Keyword(s):  
New York ◽  
New York State ◽  
Dairy Farms ◽  
Mass Balances ◽  
York State ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus
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