Learn More
Our primary objective was extending knowledge of major crop rotations and stand establishment conditions present in 4800 grass seed fields surveyed over three years in western Oregon to the entire Willamette Valley through classification of multi-band Landsat images and multi-temporal Moderate Resolution Imaging Spectroradiometer (MODIS) 16-day composite(More)
The objective of this research was the development of a method that integrated an activity analysis model of profits from production with a biophysical model, and included the capacity for optimization over multiple objectives. We specified a hybrid genetic algorithm using activity analysis as a local search method, and NSGA-II for calculation of the(More)
Agricultural practices, including tillage, fertilization, and residue management, can affect surface runoff, soil erosion, and nutrient cycling. These processes, in turn, may adversely affect (1) quality of aquatic resources as habitat for amphibians, fish, and invertebrates, (2) costs of treating surface and ground water to meet drinking water standards,(More)
Nitrogen is a key nutrient limiting productivity of many biological systems, including grasses grown for seed in western Oregon. Application of adequate amounts of nitrogen in fertilizer is a vital component in profitable production of nearly all non-leguminous crops, including cereals, pasture, and grass seed. Crops in differing stages of growth vary(More)
Given the lack of data on private wells, public health and water quality specialists must explore alternative datasets for understanding associated exposures and health risks. Characterizing agricultural nitrogen inputs would be valuable for identifying areas where well water safety may be compromised. This study incorporated existing methods for estimating(More)
T he overall goals of the Oregon National Institute of Food and Agriculture–Conservation Effects Assessment Project (NIFA–CEAP), Assessing Trade-offs Between Crop Production and Ecological Services, were to quantify linkages between conservation practices and biophysical responses, including water quality and biological indicators, and to develop a model to(More)
  • 1