Nitrogen balances
نویسندگان
چکیده
منابع مشابه
O'connor: Nitrogen Balances in Grasslands Nitrogen Balances in Natural Grasslands and Extensively-managed Grassland Systems
An approach is outlined for synthesising current understanding of nitrogen dynamics in natural grasslands and extensively managed grassland systems. The increasing complexity of models is illustrated from recent literature, first conceptualising and eventually process-simulating the dynamics of nitrogen, especially in the soil sub-systems of grasslands. Some comparisons are made between New Zea...
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Nitrogen (N) is essential for agricultural production, but excess quantities can be detrimental to both water and air quality. The increase in dairy cattle populations in the Magic Valley of southern Idaho has lead to concerns over the impact of N losses to the environment and the impact on both water and air in the region. This work examines the N flows and balances at the production facility,...
متن کاملEnergy and nitrogen balances in very low birthweight infants.
Energy and nitrogen balances were performed in 12 very low birthweight infants fed on either human milk or on a preterm formula. Energy and nitrogen retention were significantly higher in those given the formula feed (p less than 0.05). Highly significant correlations were found between nitrogen intake and nitrogen retention and between energy retention and nitrogen retention (p less than 0.001...
متن کاملNitrogen balances for households in the mid-hills of Nepal
Sustainable production requires balanced resource use and it is the management decisions at a household level that determine nutrient fluxes and the economic viability of enterprises. Traditionally, the agricultural systems of the mid-hills of Nepal have relied on the close integration of forestry, livestock husbandry and crop production but increasing population and other social changes are st...
متن کاملFarm nitrogen balances in six European agricultural landscapes
Introduction Conclusions References
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ژورنال
عنوان ژورنال: Proceedings of the Nutrition Society
سال: 1967
ISSN: 0029-6651,1475-2719
DOI: 10.1079/pns19670020