Nitrate leaching from a small, underdrained, grassland, clay catchment

Haigh, Rosalyn A.; White, Rob

doi:10.1111/j.1475-2743.1986.tb00683.x

Cited by 32 publications

(11 citation statements)

References 14 publications

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“…During the period under study, the annual input of nitrogen from wet deposition was 6.6 kg N ha 71 . Studies on nitrate leaching and soil nitrogen dynamics at the site have previously been carried out by White et al (1983), Macduff & White (1984, 1985, Haigh & White (1986) and Jamieson et al (1998).…”

Section: S It E D E Sc R I P Ti O Nsmentioning

confidence: 99%

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Effects of the 1995–1997 drought on nitrate leaching in lowland England

Morecroft

Burt

Taylor

et al. 2000

Soil Use and Management

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The effect of drought between summer 1995 and 1997 on stream and river nitrate concentrations was investigated using sites close to the long-running meteorological station in Oxford, UK. Nitrate concentrations in the River Windrush were relatively low during the drought, but after it had ended reached the highest level since records began in 1973. The low concentrations during the drought probably reflect a reduced contribution from agricultural runoff. High nitrate concentrations were found in a field drain at Wytham Environmental Change Network site during and after the drought, but discharge was greatly reduced. A woodland stream at Wytham had much lower nitrate concentrations than the field drain but these similarly increased during and after the drought. There was evidence that both a concentrating effect of low water volumes and enhanced soil nitrogen mineralization and nitrification rates were causing concentrations to rise.The effects of mineralization and nitrification were more important in woodland than agricultural land. Nitrate load over the course of a year was determined largely by discharge, but steeper gradients for the relationship between cumulative load and cumulative discharge were seen during and after the drought than before, reflecting the higher concentrations.

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Section: S It E D E Sc R I P Ti O Nsmentioning

confidence: 99%

“…Flow dries up in midsummer, despite being fed by perennial flow at Site 2; its ephemeral nature reflects strongly seasonal contributions from the tile drains. The small grassland sub-catchment described by Haigh & White (1986) also flows into this field drain (Field 29b on Figure 1).…”

Section: Water Samplesmentioning

confidence: 99%

Effects of the 1995–1997 drought on nitrate leaching in lowland England

Morecroft

Burt

Taylor

et al. 2000

Soil Use and Management

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“…Previous hydrological conditions are often a far more significant control of N losses. Haigh and White (1986) reported leaching losses of 9% and 43% of added N from grassland in Oxfordshire in two successive years with different rainfall patterns. Dowdell(l982) suggested that on average between 3% and 11 070 of fertilizer N added to grassland was lost to drainage in the following year, and between 1% and 7% lost from arable crops.…”

Section: Agriculturementioning

confidence: 97%

Quantifying anthropogenic nutrient sources and loadings within a small catchment with conservation interests, eastern Scotland

Grieve

Gilvear

1994

Aquatic Conservation

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ABSTRACT1. This paper demonstrates the possibility of quantifying sub-catchment nutrient budgets from routinely monitored hydrological and hydrochemical data. The relative importance of a number of potential anthropogenic nutrient sources was quantified for a small catchment in Scotland. Within the catchment there are two Sites of Special Scientific Interest, including two lochs and a floodplain mire. The study was undertaken to provide information for prescribing strategies to safeguard the conservation interests of these aquatic systems.2. The principal source of nitrate was found to be groundwater. Phosphate and ammonium loadings were greatest in surface run-off. The evidence indicates that the greatest contributor towards these nutrient sources is agriculture. Even when conservative estimates of losses were applied, current fertilizer and animal inputs could account for present day nutrient loadings. In addition, changes in the area under arable farming and under individual crops during the past 30 years are consistent with trends in nitrate and phosphate loads.3. Nutrient inputs from sewage works overflows and septic tanks within the catchment were estimated to be small. Leachate from a landfill site within the catchment was also not considered to be a major source of nutrients, but a more intensive water quality monitoring programme would be needed to confirm the absence of leachate plumes.4. The only long-term solution to reducing nutrient loadings to the aquatic systems is a reduction in agricultural activities within the catchment and avoidance of fertilizer and slurry applications near water sources. Diversion of drainage ditch waters supplying the floodplain mire is also a possibility but the hydrological consequences of such an action could induce more severe degradation than that due io nutrient enrichment.

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“…and potatoes the immediate source of the nitrogen is rarely unused fertiliser but is more often organic nitrogen. For example Haigh and White (1986) examined losses of nitrogen in tile drains under a clay soil beneath grazed grassland and found the total amounts of N lost by leaching in 1983/84 were 17.5 and 48.7 kg N ha -1 in the two years representing 9 and 43 % respectively of the N added. Until recently it was believed that the major source of leached nitrate appearing in water supplies in East and South East England was from arable crops with grassland making little contribution (Hood, 1976;Royal Society, 1983).…”

Section: /Cossmentioning

confidence: 99%

Ecology of Arable Land — Perspectives and Challenges

Clarholm¹,

Bergström²

1989

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Nitrate leaching from a small, underdrained, grassland, clay catchment

Cited by 32 publications

References 14 publications

Effects of the 1995–1997 drought on nitrate leaching in lowland England

Effects of the 1995–1997 drought on nitrate leaching in lowland England

Quantifying anthropogenic nutrient sources and loadings within a small catchment with conservation interests, eastern Scotland

Ecology of Arable Land — Perspectives and Challenges

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