The Nashua agronomic, water quality, and economic dataset

Drainage water management

“…Reducing N losses is difficult because the nitrate form is mobile in soil solution and may be readily leached with subsurface drainage water. A number of methods may be used to reduce losses (Dinnes et al 2002;Heilman et al 2012). They include source reduction by fertilizing at appropriate rates, cover crops, routing drainage water through wetlands, use of biofilters, and DWM.…”

“…Crop yields were increased by DWM on some sites and not on others, with the year-to-year impacts of DWM on yields dependent on weather conditions, as well as the above factors. Papers reporting advances in the development of datasets and models to predict the impact of drainage intensity and DWM on hydrology and water quality at watershed and basin scales are also included in this collection (Moriasi et al 2012;Heilman et al 2012).…”

Corn stover harvest increases herbicide movement to subsurface drains – Root Zone Water Quality Model simulations

“…Soils in the plot consisted of somewhat poorly drained Floyd loam (fine‐loamy, mixed, superactive, mesic Aquic Pachic Hapludoll) and Readlyn loam (fine‐loamy, mixed, superactive, mesic Aquic Hapludoll) developed in sediment overlying glacial till. Maximum slope in plot 13 was <2%, and surface run‐off was not measured but was reportedly minimal, based on measurements made at other plots at the site . Soil samples were taken 4–5 times each year to depths of up to 60 cm to determine the amount of metolachlor retained in the soil.…”

“…Maximum slope in plot 13 was <2%, and surface run-off was not measured but was reportedly minimal, based on measurements made at other plots at the site. 25 Soil samples were taken 4-5 times each year to depths of up to 60 cm to determine the amount of metolachlor retained in the soil. Further details on plot design, operation and soil properties can be found in Kanwar et al, 26 Kumar et al 27 and Malone et al 28 and in the online database available at http://apps.tucson.ars.ag.gov/nashua/.…”