The intersection of agricultural drainage and nutrient mobility in the environment has led to multiscale water quality concerns. This work reviewed and quantitatively analyzed nearly 1,000 site-years of subsurface tile drainage nitrogen (N) load data to develop a more comprehensive understanding of the impacts of 4R practices (application of the right source of nutrients, at the right rate and ...

A new aperiodic tile set containing only 13 tiles over 5 colors is presented. Its construction is based on a technique recently developed by J. Kari. The tilings simulate behavior of sequential machines that multiply real numbers in balanced representations by real constants.

Simulation modeling is widely used to assess water contamination risk associated with pesticide use and for evaluating effectiveness of agricultural conservation practices. Currently the Agricultural Policy/Environmental eXtender (APEX) model is being used for this purpose in the USDA Conservation Effects Assessment Project (CEAP) Cropland National Assessment. In support of the CEAP modeling ef...

Soil erosion, runoff and sediment connectivity are strongly impacted by anthropogenic features in lowland agricultural catchments. Among these landscape features, the role played tile drainage on water transfers hillslope-to-river drained catchments remains poorly understood. This study quantified a catchment of central France combining high frequency rainfall, discharge concentration measureme...

Salinity is a major threat to the sustainability of irrigated agriculture in arid and semi-arid regions. Leaching primary measure for removing excess salts from root zone, but not all water applied soil surface contributes removal salts. In clayey soils, bypass flow along cracks can occur without being mixed with saline pore matrix. To present field dataset quantitatively evaluate contribution ...