II. Drainage losses of nitrate and other nutrients
نویسندگان
چکیده
منابع مشابه
Simulating nitrate drainage losses from a Walnut Creek watershed field.
This study was designed to evaluate the improved version of the Root Zone Water Quality Model (RZWQM) using 6 yr (1992-1997) of field-measured data from a field within Walnut Creek watershed located in central Iowa. Measured data included subsurface drainage flows, NO3-N concentrations and loads in subsurface drainage water, and corn (Zea mays L.) and soybean [Glycine mar (L.) Merr.] yields. Th...
متن کاملEndogenous losses of nutrients.
(2) (3) These are not presented in the form of practical allowances. Hence, in practice, safety margins will be allowed to take account of such factors as variations in availability of nutrients in different samples of feeding-stuffs, possible losses during manufacture and storage of food, breed and individuality of animals, environmental circumstances and standards of husbandry. livestock has ...
متن کاملcontrol of salinity and nitrate losses in drainage water under water table management
controlled drainage is one of the strategies to reduce negative environmental effects in conventional drainage systems. this study examines the effect of controlled drainage on quality and quantity of drainage water, specifically amounts of salt and nitrate in drainage water, and nitrate uptake by maize (sc 704) with sandy loam soil texture in karaj. the experiment was performed as a randomized...
متن کاملTile Drainage Nitrate Losses and Corn Yield Response to Fall and Spring Nitrogen Management.
Nitrogen (N) management strategies that maintain high crop productivity with reduced water quality impacts are needed for tile-drained landscapes of the US Midwest. The objectives of this study were to determine the effect of N application rate, timing, and fall nitrapyrin addition on tile drainage nitrate losses, corn ( L.) yield, N recovery efficiency, and postharvest soil nitrate content ove...
متن کاملEvaluation of simulated strategies for reducing nitrate-nitrogen losses through subsurface drainage systems.
The nitrates (NO(3)-N) lost through subsurface drainage in the Midwest often exceed concentrations that cause deleterious effects on the receiving streams and lead to hypoxic conditions in the northern Gulf of Mexico. The use of drainage and water quality models along with observed data analysis may provide new insight into the water and nutrient balance in drained agricultural lands and enable...
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ژورنال
عنوان ژورنال: New Zealand Journal of Agricultural Research
سال: 1978
ISSN: 0028-8233,1175-8775
DOI: 10.1080/00288233.1978.10427430