TESTING THE ABILITY OF DRAINMOD 5.1TO SIMULATE THE EFFECT OF WATER TABLE MANAGEMENT PRACTICES ON NITRATE NITROGEN IN DRAINAGE WATER

2002 ◽  
Author(s):  
Eric Zwierschke ◽  
Norman R. Fausey ◽  
Larry C. Brown
Keyword(s):  
Water Table ◽  
Management Practices ◽  
Nitrate Nitrogen ◽  
Drainage Water ◽  
Effect Of Water ◽  
Water Table Management

GROUNDWATER RESIDUES OF ATRAZINE AND ALACHLOR UNDER WATER-TABLE MANAGEMENT PRACTICES

1997 ◽  
Vol 40 (3) ◽  
pp. 605-614 ◽  
Author(s):  
P. K. Kalita ◽  
R. S. Kanwar ◽  
J. L. Baker ◽  
S. W. Melvin
Keyword(s):  
Water Table ◽  
Management Practices ◽  
Water Table Management

Reducing Nitrate Loss in Tile Drainage Water with Cover Crops and Water-Table Management Systems

2014 ◽  
Vol 43 (2) ◽  
pp. 587-598 ◽  
Author(s):  
C. F. Drury ◽  
C. S. Tan ◽  
T. W. Welacky ◽  
W. D. Reynolds ◽  
T. Q. Zhang ◽  
...  
Keyword(s):  
Water Table ◽  
Cover Crops ◽  
Drainage Water ◽  
Tile Drainage ◽  
Management Systems ◽  
Nitrate Loss ◽  
Water Table Management

Effect of Water Table Management and Irrigation on Potato Yield

2012 ◽  
Vol 55 (6) ◽  
pp. 2175-2184 ◽  
Author(s):  
S. Satchithanantham ◽  
R. Sri Ranjan ◽  
B. Shewfelt
Keyword(s):  
Water Table ◽  
Potato Yield ◽  
Effect Of Water ◽  
Water Table Management

Water Table Management as a Natural Bioremediation Technique of Nitrate Pollution

2002 ◽  
Vol 37 (3) ◽  
pp. 563-576 ◽  
Author(s):  
Abdirashid A. Elmi ◽  
Chandra Madramootoo ◽  
Mohamud Egeh ◽  
Georges Dodds ◽  
Chantal Hamel
Keyword(s):  
Water Table ◽  
Soil Surface ◽  
Field Trials ◽  
Fertilization Rate ◽  
N Fertilization ◽  
Drainage Water ◽  
Free Drainage ◽  
Water Table Management ◽  
N Pollution ◽  
Water Treatments

Abstract Nitrate-nitrogen (NO3--N) pollution of water resources is a worldwide problem. Field trials were conducted from 1997 to 1998 to investigate the combined impacts of water table management (WTM) and N fertilization rate on soil NO3--N level and concentration of NO3--N in drainage water. Treatments consisted of two water table treatments: free drainage (FD) with open drains at a 1.0-m depth from the soil surface and subirrigation (SI) with a design water table of 0.6 m below the soil surface, and two N fertilizer rates: 200 kg N ha-1 (N200) and 120 kg N ha-1 (N120) in a split-plot design. Subirrigation reduced NO3--N concentration in the soil compared to FD by 37% in the spring of 1997 but not significantly (2%) in 1998; and 45% and 19% in the fall of 1997 and 1998, respectively. Higher rates of fertilization (N200) resulted in greater levels of NO3--N in the soil profile than the N120. Nitrate-N concentrations in drainage water from SI were 74% and 80% lower than those from FD in 1997 and 1998, respectively. Water table management can effectively reduce NO3--N pollution of water.

Integrated Soil, Crop and Water Management System to Abate Herbicide and Nitrate Contamination of the Great Lakes

1993 ◽  
Vol 28 (3-5) ◽  
pp. 497-507 ◽  
Author(s):  
C. S. Tan ◽  
C. F. Drury ◽  
J. D. Gaynor ◽  
T. W. Welacky
Keyword(s):  
Water Table ◽  
Surface Runoff ◽  
Management System ◽  
Management Practices ◽  
Drainage Water ◽  
Tile Drainage ◽  
Nitrate Contamination ◽  
Runoff Water ◽  
Runoff Events ◽  
Water Table Control

Corn management practices, incorporating annual ryegrass intercrop, conservation tillage and water table management, were evaluated to reduce herbicide and N0−3 losses through surface runoff and tile drainage. The integrated management system being developed at Harrow in S.W. Ontario reduced herbicide input 50% by banding the chemical over the seed row. Runoff events close to herbicide application contained high concentrations of atrazine, metribuzin and metolachlor. However, the volume of runoff was low during the 1991 growing season, therefore herbicide loss was low (<2% of applied). The three herbicides rapidly dissipated in the soil so that subsequent runoff events transported little herbicide in the runoff water. The total quantity of de-ethyl atrazine loss was lower from soil saver than moldboard plow. No water table control or intercrop effects were found in 1991 for herbicide loss because of the drought Tile drainage resulted in a greater volume of water and loss of N0−3 than with surface runoff. Consequently, over 97% of the total N0−3 loss occurred through tile drainage. The flow weighted N0−3 concentration in tile drainage water was 22.5 mg N L−1 for the drainage treatments and 15.1 mg N L−1 for the water table control treatments from Nov. 1, 1991 till April 30, 1992. During this time period, N0−3 loss through tile drainage was 57.8 kg N ha−1 from the drainage treatments and 36.3 kg N ha−1 from the water table control treatments. Therefore, the water table control treatment reduced the flow weighted N0−3 concentration in tile drainage water by 33% and total N0−3 loss by 37%. The water table control treatments combined with soil saver tillage resulted in lower concentrations and losses of N0−3 than with any other treatments.

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