Results 281 to 290 of about 3,075,999 (346)
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Ecosystem Nutrient Balance and Dynamics

2000
Many attempts at balancing ecosystem-level nutrient budgets have been made in the past few decades using a variety of approaches, and for a variety of different purposes. Relatively simple mass balance equations have been used at the level of the watershed that might comprise single forested ecosystems (e.g., Binkley et al. 1982; Stohlgren et al. 1991;
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Nutrient balance and soil changes in plastic greenhouse vegetable production

Nutrient Cycling in Agroecosystems, 2020
Ya''nan Fan   +4 more
semanticscholar   +1 more source

Balancing nutrient supply and nutrient requirements in grazing sheep

Small Ruminant Research, 2010
Abstract Attempting to achieve a balance between the supply of and requirements for the major nutrients implies that demands for major nutrients can be adequately quantified, that the nutritive value of the consumed diet can be described in similar terms and that the diet actually consumed by the grazing sheep can be estimated, or at least predicted,
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Efficient use of nutrients: an art of balancing

Field Crops Research, 1998
Abstract Nutrient-use efficiency is conceived as the product of uptake efficiency, i.e., the ratio of actual uptake to potential supply, and utilization efficiency, i.e., the ratio of yield to actual uptake. Both depend on the availability of the nutrient in relation to other growth factors, and require N, P and K perfectly in balance to reach their ...
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Nutrient Cycles and Mass Balances

2013
Chemical elements without a prominent gaseous phase at normal biologic temperature, such as calcium, magnesium, and potassium, have what is referred to as a sedimentary biogeochemical cycle (Odum 1959). That is, flux and cycling are affected primarily by hydrologic factors (including dissolution, erosion, and sedimentation), landslides, vulcanism, and ...
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Balance of nutrients: Is more better?

Science Translational Medicine, 2016
Changes in maternal plasma folate concentrations affect genome-wide DNA methylation status of the fetus.
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Nutrient Element Balance

Soil Science, 1954
C. B. SHEAR, H. L. CRANE, A. T. MYERS
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