Increased denitrification below the root zone in the fall following a spring manure application

1997 ◽  
Vol 77 (2) ◽  
pp. 249-251 ◽  
Author(s):  
J. W. Paul ◽  
V. Etches ◽  
B. J. Zebarth
Keyword(s):  
Dairy Cattle ◽  
Shallow Water ◽  
Key Words ◽  
Water Table ◽  
Soil Profile ◽  
Root Zone ◽  
Cattle Slurry ◽  
Shallow Water Table ◽  
Indirect Measurements ◽  
Dairy Cattle Slurry

Indirect measurements of denitrification to 120 cm depth in a coarse textured soil in October showed higher denitrification rates following a single spring application of dairy cattle slurry than following a spring application of fertilizer. The highest denitrification rates occurred immediately above and below the water table (90 cm depth) and resulted primarily from C applied in the manure moving down through the soil profile. Key words: Dairy cattle slurry, carbon, nitrate, shallow water table

Development and application of long-term root zone salt balance model for predicting soil salinity in arid shallow water table area

2019 ◽  
Vol 213 ◽  
pp. 486-498 ◽  
Author(s):  
Guanfang Sun ◽  
Yan Zhu ◽  
Ming Ye ◽  
Jinzhong Yang ◽  
Zhongyi Qu ◽  
...  
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Soil Salinity ◽  
Root Zone ◽  
Balance Model ◽  
Salt Balance ◽  
Shallow Water Table

Denitrification and nitrate leaching during the fall and winter following dairy cattle slurry application

1997 ◽  
Vol 77 (2) ◽  
pp. 231-240 ◽  
Author(s):  
J. W. Paul ◽  
B. J. Zebarth
Keyword(s):  
Dairy Cattle ◽  
Soil Profile ◽  
High Water ◽  
High Rate ◽  
Cattle Slurry ◽  
Manure Application ◽  
Total N ◽  
Acetylene Blockage Technique ◽  
Acetylene Blockage ◽  
Dairy Cattle Slurry

Conditions in soils of south-coastal British Columbia during the fall and winter favor both NO3− leaching and denitrification. Estimates of NO3− leaching were made on a coarse-textured soil having a high water table (Sumas) and a well-drained, medium-textured soil (Agassiz) in each of 1991 and 1992, following application of 0, 300 and 600 kg total N ha−1 as dairy cattle slurry at the end of September. Leaching was calculated by measuring NH4+ and NO3− concentrations biweekly to 90 cm depth and subtracting denitrification losses. Denitrification estimates were made using the acetylene blockage technique on intact cores taken to 43 cm depth at biweekly intervals from the 0 and 600 kg N ha−1 treatments. Most of the NO3− disappeared from the 90 cm soil profile by January in both years. At the high rate of manure application, denitrification losses were 29 and 20 kg N ha−1 at Agassiz in 1991 and 1992, and 48 and 17 kg N ha−1 at Sumas in 1991 and 1992, respectively. Denitrification losses in the non-manured treatments ranged from 3 to 16 kg N ha−1 Significant denitrification losses occurred at the 15- to 28-cm and the 30-cm to 43-cm depths, indicating that denitrification measurements at these depths are important. Leaching losses ranged from 60 to 188 kg N ha−1 from the control treatments, and from 102 to 241 kg N ha−1 following the highrate of manure application. Denitrification accounted for up to 17% of the NO3− loss from the soil profile, indicating that the majority of the NO3− was leached. Key words: Acetylene blockage technique, denitrification rate, air-filled porosity, manure

Sustainable Root Zone Salinity and Shallow Water Table in the Context of Land Retirement

2010 ◽  
Vol 136 (5) ◽  
pp. 289-299 ◽  
Author(s):  
Purnendu N. Singh ◽  
Wesley W. Wallender ◽  
Marco P. Maneta ◽  
Stephen L. Lee ◽  
Beatrice A. Olsen
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Root Zone ◽  
Shallow Water Table ◽  
Land Retirement ◽  
Root Zone Salinity

Shallow Water Table Fluctuations in Relation to Soil Penetration Resistance

Ground Water ◽  
2003 ◽  
Vol 41 (7) ◽  
pp. 964-972 ◽  
Author(s):  
James B. Shanley ◽  
K. Niclas Hjerdt ◽  
Jeffrey J. McDonnell ◽  
Carol Kendall
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Penetration Resistance ◽  
Shallow Water Table ◽  
Water Table Fluctuations ◽  
Soil Penetration Resistance

Analysis of the contribution of groundwater to evapotranspiration in an arid irrigation district with shallow water table

2016 ◽  
Vol 171 ◽  
pp. 131-141 ◽  
Author(s):  
Zhongyi Liu ◽  
Hang Chen ◽  
Zailin Huo ◽  
Fengxin Wang ◽  
Clinton C. Shock
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Irrigation District ◽  
Shallow Water Table
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