Soil nitrate sources and nitrate leaching losses, Slapton, South Devon

1991 ◽  
Vol 7 (4) ◽  
pp. 200-206 ◽  
Author(s):  
S. T. Trudgill ◽  
T. P. Burt ◽  
A. L. Heathwaite ◽  
B. P. Arkell
Keyword(s):  
Nitrate Leaching ◽  
Soil Nitrate ◽  
Nitrate Sources ◽  
Leaching Losses

Nitrate movement in sandy soil under varying water and fertilizer management

Soil Research ◽  
1982 ◽  
Vol 20 (3) ◽  
pp. 225 ◽  
Author(s):  
SK Gupta ◽  
TN Chaudhary ◽  
RN Pandey
Keyword(s):  
Sandy Soil ◽  
Nitrate Leaching ◽  
Peak Concentration ◽  
Nitrate Nitrogen ◽  
Field Evaluation ◽  
Soil Nitrate ◽  
Fertilizer Management ◽  
Leaching Losses ◽  
Residual Nitrogen ◽  
Leaching Loss

The field evaluation and prediction of nitrate-nitrogen movement are given for varying rates of irrigation and urea application to wheat growing on a sandy soil. Nitrate leaching increased and depth to peak concentration moved deeper with heavier irrigation. Larger splits of nitrogen in combination with light irrigation reduced the leaching loss, permitting greater utilization of nitrogen by plants. Under heavier irrigation, the amount of residual nitrogen increased with the number of nitrogen splits. A simple analytical solution has been presented for predicting the movement of surface applied solutes. The solution can be used for predicting nitrate leaching losses. The applicability of the expression in determining depth to peak concentration is established under a variety of situations.

An evaluation of a strategic de-stocking regime for dairying to improve nitrogen efficiency and reduce nitrate leaching from dairy farms in nitrate-sensitive areas

2000 ◽  
pp. 105-110
Author(s):  
Cecile De Klein ◽  
Jim Paton ◽  
Stewart Ledgard
Keyword(s):  
New Zealand ◽  
Nitrate Leaching ◽  
Management Practice ◽  
Field Measurements ◽  
Dairy Farms ◽  
Nitrogen Efficiency ◽  
Management Tool ◽  
Pasture Production ◽  
Leaching Losses ◽  
Sensitive Areas

Strategic de-stocking in winter is a common management practice on dairy farms in Southland, New Zealand, to protect the soil against pugging damage. This paper examines whether this practice can also be used to reduce nitrate leaching losses. Model analyses and field measurements were used to estimate nitrate leaching losses and pasture production under two strategic de-stocking regimes: 3 months off-farm or 5 months on a feed pad with effluent collected and applied back to the land. The model analyses, based on the results of a long-term farmlet study under conventional grazing and on information for an average New Zealand farm, suggested that the 3- or 5-month de-stocking could reduce nitrate leaching losses by about 20% or 35-50%, respectively compared to a conventional grazing system. Field measurements on the Taieri Plain in Otago support these findings, although the results to date are confounded by drought conditions during the 1998 and 1999 seasons. The average nitrate concentration of the drainage water of a 5-month strategic de-stocking treatment was about 60% lower than under conventional grazing. Pasture production of the 5-month strategic de-stocking regime with effluent return was estimated based on data for apparent N efficiency of excreta patches versus uniformlyspread farm dairy effluent N. The results suggested that a strategic de-stocking regime could increase pasture production by about 2 to 8%. A cost/ benefit analysis of the 5-month de-stocking system using a feed pad, comparing additional capital and operational costs with additional income from a 5% increase in DM production, show a positive return on capital for an average New Zealand dairy farm. This suggests that a strategic destocking system has good potential as a management tool to reduce nitrate leaching losses in nitrate sensitive areas whilst being economically viable, particularly on farms where an effluent application system or a feed pad are already in place. Keywords: dairying, feed pads, nitrate leaching, nitrogen efficiency, productivity, strategic de-stocking

Soil mineral nitrogen and nitrate leaching losses in soil tillage systems combined with a catch crop

1999 ◽  
Vol 50 (2) ◽  
pp. 115-125 ◽  
Author(s):  
Maria Stenberg ◽  
Helena Aronsson ◽  
Börje Lindén ◽  
Tomas Rydberg ◽  
Arne Gustafson
Keyword(s):  
Nitrate Leaching ◽  
Mineral Nitrogen ◽  
Soil Tillage ◽  
Catch Crop ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen ◽  
Tillage Systems ◽  
Leaching Losses

Measurement of nitrate leaching losses from lysimeters on a dairy farm following conversion from forestry

2021 ◽  
pp. 1-19
Author(s):  
Nigel D. Beale ◽  
William D. Talbot ◽  
Keith C. Cameron ◽  
Hong J. Di ◽  
Rhys Narbey
Keyword(s):  
Nitrate Leaching ◽  
Dairy Farm ◽  
Leaching Losses

Effects of the timing of ploughing-in temporary leguminous pastures and two winter cover crops on nitrogen mineralization, nitrate leaching and spring wheat growth

1995 ◽  
Vol 124 (1) ◽  
pp. 1-9 ◽  
Author(s):  
G. S. Francis ◽  
R. J. Haynes ◽  
P. H. Williams
Keyword(s):  
Spring Wheat ◽  
Nitrate Leaching ◽  
Cover Crops ◽  
N Uptake ◽  
First Year ◽  
Mineral N ◽  
Leaching Losses ◽  
Winter Cover ◽  
Winter Cover Crops ◽  
Second Year

SUMMARYTwo field experiments at Canterbury, New Zealand during 1991–93 investigated the effect of the timing of ploughing a 4-year-old ryegrass/white clover pasture and the effect of two winter cover crops on subsequent N mineralization, nitrate leaching and growth and N uptake of the following wheat crops.Net N mineralization of organic N (of plant and soil origin) increased with increased fallow period between ploughing and leaching. The total amount of N accumulated in the profile by the start of winter ranged from 107 to 131 and from 42 to 45 kg N/ha for fallow treatments started in March and May respectively. Winter wheat (planted in May) had no effect on mineral N contents by the start of winter, whereas greenfeed (GF) oats (planted in March) significantly reduced the mineral N content in one year.Cumulative leaching losses over the first winter after ploughing-in pasture varied markedly between years in relation to rainfall amount and distribution. Leaching losses were greater from the March fallow (72–106 kg N/ha) than the May fallow treatments (8–52 kg N/ha). Winter wheat did not reduce leaching losses in either year. GF oats did not reduce losses in 1991/92, but losses in 1992/93, when major drainage events occurred late in the winter, were only c. 40% of those under fallow.Incorporation of a large amount (> 7 t/ha dry matter) of pasture or GF oat residue in spring depressed yield and total N uptake of the following spring wheat, largely due to net N immobilization which could be overcome by the application of fertilizer N.First-year treatments had very little residual effect in the second year. Leaching losses over the second winter (mean 142 kg N/ha) were largely unaffected by the extent of first year leaching losses. Second year leaching losses were greater than first year losses, probably due to the greater amount of mineral N at depth in the soil before the start of the second winter.

Estimating soil nitrate leaching of nitrogen fertilizer from global meta-analysis

2019 ◽  
Vol 657 ◽  
pp. 96-102 ◽  
Author(s):  
Yingcheng Wang ◽  
Hao Ying ◽  
Yulong Yin ◽  
Huifang Zheng ◽  
Zhenling Cui
Keyword(s):  
Nitrate Leaching ◽  
Nitrogen Fertilizer ◽  
Meta Analysis ◽  
Soil Nitrate

Soil nitrate leaching of tea plantation and its responses to seasonal drought and wetness scenarios

2022 ◽  
Vol 260 ◽  
pp. 107325
Author(s):  
Fei Liu ◽  
Qing Zhu ◽  
Zhiwen Zhou ◽  
Kaihua Liao ◽  
Xiaoming Lai
Keyword(s):  
Nitrate Leaching ◽  
Soil Nitrate ◽  
Tea Plantation ◽  
Seasonal Drought

scholarly journals Nitrate leaching and N2-fixation in grasslands of different composition, age and management

2004 ◽  
Vol 142 (2) ◽  
pp. 141-151 ◽  
Author(s):  
J. ERIKSEN ◽  
F. P. VINTHER ◽  
K. SØEGAARD
Keyword(s):  
Perennial Ryegrass ◽  
Nitrate Leaching ◽  
Dry Matter ◽  
Grazing Intensity ◽  
Dry Matter Production ◽  
Leaching Losses ◽  
N Removal ◽  
Matter Production ◽  
Over Time

Grass-legume associations may offer a way of improving the N efficiency of dairy farming, but may also have an adverse impact on the environment by increasing leaching losses. Nitrate leaching from four cropping sequences with different grassland frequency and management (long-term grazed, long-term cut, cereals followed by 1 and 2-year grazed leys) were investigated on a loamy sand in central Jutland for both unfertilized grass-clover (perennial ryegrass (Lolium perenne L.)/white clover (Trifolium repens L.)) and fertilized perennial ryegrass (300 kg N/ha) swards during 1997–2002. Furthermore, 1 year (2001) of N2 fixation in 1-, 2- and 8-year-old grass-clover pastures was determined. Nitrate leaching from grazed unfertilized grass-clover was always considerably lower than from grazed fertilized ryegrass. The effect of grassland age on nitrate leaching was insignificant in grass-clover but clear in grazed ryegrass, where levels increased dramatically with sward age. In production years 6–8, leaching from grass-clover was only 9–13% of the comparable losses from ryegrass. Under the cutting regime grass-clover showed a significant reduction in both yield and N-removal with increasing sward age, whereas for ryegrass these figures did not show any decreasing trend. N2 fixation was lower in 8-year-old swards compared with fully established 2-year-old swards as a consequence of lower dry matter production, lower clover content and a lower proportion of clover-N derived from the atmosphere. The results from the present study indicate that the higher leaching losses observed in fertilized grass compared with unfertilized grass-clover systems were caused by (1) a reduction in N2-fixation in grass-clover over time and (2) a reduction in dry matter production in grass-clover over time, lowering the grazing intensity and the recycling of grassland N via animal excreta.

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