Subsurface Nitrate–N Leaching Loss as Affected by Drainage Size and Depth in a Shallow Slowly–Permeable Soil

Nitrate loss in subsurface drainage as affected by nitrogen fertilizer rate.

The relationships between N fertilizer rate, yield, and NO3 leaching need to be quantified to develop soil and crop management practices that are economically and environmentally sustainable. From 1996 through 1999, we measured yield and NO3 loss from a subsurface drained field in central Iowa at three N fertilizer rates: a low (L) rate of 67 kg ha(-1) in 1996 and 57 kg ha(-1) in 1998, a medium...

Nitrate loss in subsurface drainage as affected by nitrogen application rate and timing under a cornsoybean rotation system

Subsurface agricultural drainage has allowed for enhanced crop production in many areas of the world including the upper Midwest, United States. However, the presence of nitrate-nitrogen (nitrate-N) in subsurface tile drainage water is a topic of intense scrutiny due to several water quality issues. Many studies have been conducted looking at ways to reduce nitrate-N in tile drainage (Baker et ...

Nitrate leaching to subsurface drains as affected by drain spacing and changes in crop production system.

Subsurface drainage is a beneficial water management practice in poorly drained soils but may also contribute substantial nitrate N loads to surface waters. This paper summarizes results from a 15-yr drainage study in Indiana that includes three drain spacings (5, 10, and 20 m) managed for 10 yr with chisel tillage in monoculture corn (Zea mays L.) and currently managed under a no-till corn-soy...

Soil genetics as affected by topography and depth of saline and alkali ground water under semiarid conditions in southern iran

Soil genesis as affected by topography and depth of saline and sodic ground water under semiarid conditions of iran