Filters: Tags: yield (X)161 results (70ms)
Simulating effects of variable nitrogen application rates on corn yields and NO-N losses in subsurface drain water
Using a model as a management tool requires testing of the model against field-measured data prior to its application for solving natural resource problems. This study was conducted to test the Root Zone Water Quality Model (RZWQM98) using four years (1996 to 1999) of field-measured data to simulate the effects of different N-application rates on corn yields and nitrate-nitrogen (NO-N) losses via subsurface drain water. Three N-application rates (low, medium, and high), each replicated three times, were applied to corn in 1996 and 1998 under a randomized complete block design at a tile-drained corn-soybean rotation field near Story City, Iowa. No N-fertilizer was applied to soybean in 1997 and 1999. Model calibration...
Industrialization of plant transformation. Plant transformation facilities offer a range of assistance, from advice to "full service" transformation
Pilot plant scale extraction of alginates from Macrocystis pyrifera. 2. Studies on extraction conditions and methods of separating the alkaline-insoluble residue
Estimation of resources of chub mackerel, round scad and other pelagic fish stocks in the Taiwan Strait and the adjacent waters.
Environmental history of agricultural systems can offer a long-term perspective for the discussion on sustainability
Modelling the effects of elevated CO sub(2) and temperature on Swedish and German spring wheat varieties with CERES-wheat and AFRC-wheat crop models
Comparative Studies of the Life History and Production Potential of Bay Anchovy Anchoa mitchilli and Northern Anchovy Engraulis mordax: An Individual-based Modeling Approach
Shrimp Bycatch in the United States Gulf of Mexico: Review and Evaluation of Bycatch Effects on Exploited Fish Stocks
Fish stock assessment of the northern New Caledonian lagoons: 3. Fishing pressure, potential yields and impact on management options