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Recovering Nitrate Leaching Values

  • Recovering Nitrate Leaching Values

    Recovering Nitrate Leaching Values

    PDF Potato Yield Response and Nitrate Leaching as In contrast, the 1992 growing season was characterized by less total rainfall and fewer leaching events. Recovery Residual Soil Nitrate of N in plant tissue averaged 56 in 1992, with no Residual soil NO3Ndetermined after harvest in the significant difference in recovery amongthe various N top 90 cm was basically at background levels in both

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  • PDF A review of methods for nitrate leaching measurement

    PDF A review of methods for nitrate leaching measurement

    However, the amounts of nitrate leaching, DON leaching, and N gas emission N x O and NH 3 under conventional N management were 2.1, 1.3, and 1.1-fold greater than those in the reduced N ...

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  • Measures for reducing nitrate leaching in orchardsA

    Measures for reducing nitrate leaching in orchardsA

    Aug 01, 2020 The key words mainly include nitrate leaching, and then further reduce to orchards and fruit trees. As can be seen from Fig. 1, the number of articles on the topic of nitrate leaching basically increased from 2000 to 2019, indicating that the topic of nitrate governance is still a hot topic. Download Download high-res image 172KB

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  • Low nitrogen use efficiency and high nitrate leaching in a

    Low nitrogen use efficiency and high nitrate leaching in a

    As a result of high water drainage 1,745 mm for a total rainfall of 2,678 mm, the main fate of N fertilizer was NO3 leaching 3355 of 15N recovery. The annual NO3 N leaching at a depth of 120 cm was 157.2 kg N ha1 year1including 82.8 from applied N

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  • Effects on nitrate leaching of the timing of cattle slurry

    Effects on nitrate leaching of the timing of cattle slurry

    For leaching calculations, daily values of measured drainage runoff were multiplied by daily values of nitrate concentration, obtained through linear interpolation between sampling dates. 2.7 Yield Yield was measured plotwise at all cuts, by weighing the fresh weight on a 15m 2 area within each plot and multiplying by the dry matter content.

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  • Improving estimates of nitrate leaching for quantifying

    Improving estimates of nitrate leaching for quantifying

    Improving estimates of nitrate leaching for quantifying New Zealands indirect nitrous oxide emissions Stephen M. Thomas1,, Stewart F. Ledgard2 and

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  • Simulating nitrate leaching Modelling approach ClimaRisk

    Simulating nitrate leaching Modelling approach ClimaRisk

    Simulating nitrate leaching Procedures. The modelling approach shown below was followed in the LIFE NITRATES project. It was used as well as in the Horizon 2020 FREEWAT project. Both projects were conducted by Zeta Amaltea contractor. They aimed to help to implement the EU Nitrates Directive, simulating nitrate leaching from agricultural zones.

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  • Nitrogen fertilization and nitrate leaching into

    Nitrogen fertilization and nitrate leaching into

    Mar 28, 2006 Nitrate leaching depending on N fertilization and different crop rotations was studied at two sites with sandy soils in N Germany between 1995 and 2000. The leaching of NO was calculated by using a numerical soilwater and N model and regularly measured N min values as input data.

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  • Nitrogen mineralization plant uptake and nitrate leaching

    Nitrogen mineralization plant uptake and nitrate leaching

    The 15N recovery by the potatocauliflower rotation began at 46, then decreased sharply to 12 and 6 for the second and third year, respectively. The cumulative 15N leaching rate was only 3 63 remained in the soil 3 years after incorporation.

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  • Simulation of bromide and nitrate leaching under heavy

    Simulation of bromide and nitrate leaching under heavy

    Oct 01, 2010 Under the I0 treatment, drainage and nitrate leaching below 2.1 m in the three replicate plots occurred from August 15 the 42 th day to the end of the experiment. The drainage curve was one flat peak and had values less than 5 mm d 1. The dynamics of nitrate leaching also exhibited just one gentle peak below 10 kg N ha 1 d 1. Under ...

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  • Screening Soil Leaching Values SLV Spreadsheet

    Screening Soil Leaching Values SLV Spreadsheet

    This June 2013 SLV Spreadsheet provides the most current tabulated default Soil Leaching Values Default SLVs designed to be screening criteria to evaluate soil contaminant leaching risks to groundwater and also provides a means to calculate a more site specific SLV Site-Adjusted SLVs.

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  • Modeling nitrogen uptake and potential nitrate leaching

    Modeling nitrogen uptake and potential nitrate leaching

    The computer program Nitrate Leaching and Economic Analysis Package NLEAP is a mechanistic model developed for rapid site-specific estimates of nitrate-nitrogen NO3-N moving below the root zone in agricultural crops and potential impacts of NO3-N leaching into groundwater.

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  • Estimating Nitrate Leaching to Groundwater from

    Estimating Nitrate Leaching to Groundwater from

    Leaching of N applied to agricultural land below the effective root zone is of great concern to groundwater quality worldwide 25 26 29 59.However, large spatial and temporal variability in leachable N concentrations mainly nitrate N NO 3 N below the effective root zone, at the scale of typical field vadose zone instrumentation, makes it difficult to accurately quantify NO 3 ...

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  • Nitrate leaching from Kentucky bluegrass soil columns

    Nitrate leaching from Kentucky bluegrass soil columns

    2003. Higher rates of N application coupled with lower N recovery, which result in higher concentrations of residual soil NO 3 N, sug-gest that NO 3 N leaching is increased at high rates of N application. Increased NO 3 N leaching from turf with higher rates of N applica-tion has been noted Morton et al., 1988 Mancino and Troll, 1990

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  • Nitrate Leaching Foundation for Arable Research

    Nitrate Leaching Foundation for Arable Research

    Nitrate levels in the soil Drainage from saturated soils Most crops prefer to take up nitrogen as nitrate. Having an available supply of nitrate when the plant needs it is an asset for the crop. Having too much nitrate in the soil can be a liability. Farmers can reduce leaching risk by matching their fertiliser applications to the crop demand.

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  • An equation to predict the leaching of surfaceapplied nitrate

    An equation to predict the leaching of surfaceapplied nitrate

    The fraction f of surface-applied nitrate leached below any depth h cm in a uniform soil profile may be calculated from the equationwhere P is the quantity of water draining through the soil in cm and V m is the percentage volumetric field capacity. The fraction of nitrate retained is then 1f. This equation has been tested using published data. Values of h corresponding to the mean ...

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  • Agronomic Management for Reduced Nitrate Leaching

    Agronomic Management for Reduced Nitrate Leaching

    Jan 07, 2020 The leaching of nitrate to groundwater and the increasing occurrence of groundwater with excessive nitrate levels for human consumption is a major concern in Nebraska. The amount of leached NO3- depends on soil NO3- concentration at different soil depth layers and the quantity of water movement downward through these soil layers to beyond the root zone.

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  • Agronomic Management for Reduced Nitrate Leaching

    Agronomic Management for Reduced Nitrate Leaching

    Jan 07, 2020 The cost of reducing NO 3-leaching with fertilizer-N reductions of up to 50 lbac varies from 0.29 to 0.69lb of leached nitrate-N 1.1 to 2.6 reduction in net return to fertilizer-N for corn after corn and 0.53 to 1.18lb N of leached nitrate-N 1.7 to 4.1 reduction in net return to fertilizer-N for corn after soybean.

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  • Nitrate leaching and nitrogen recovery following

    Nitrate leaching and nitrogen recovery following

    High N fertilizer and irrigation amounts applied to potato Solanum tuberosum L. on coarse-textured soils often result in nitrate NO 3 leaching and low recovery of applied fertilizer N.This 3-yr study compared the effects of two rates 140 and 280 kg N ha-1 of a single polyolefin-coated urea PCU application versus split applications of urea on Russet Burbank potato yield and on NO 3 ...

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  • Nitrate leaching reduced with DynamicAdaptive nitrogen

    Nitrate leaching reduced with DynamicAdaptive nitrogen

    Dec 27, 2019 The low crop recovery of supplemental N results in environmental problems such as nitrate leaching into groundwater, streams, and estuaries David, Drinkwater, amp McIsaac, 2010, and emissions of a reactive greenhouse gas, N 2 O, into the atmosphere Millar, Robertson, Grace, Gehl, amp Hoben, 2010 Snyder, Bruulsema, Jensen, amp Fixen, 2009.

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  • PDF An Alternative Process for Leaching Chalcopyrite

    PDF An Alternative Process for Leaching Chalcopyrite

    An alternative copper concentrate leaching process using sodium nitrate and sulfuric acid diluted in seawater followed by gas scrubbing to recover the sodium nitrate has been evaluated.

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  • Chapter 7 Nutrient Leaching Cornell University

    Chapter 7 Nutrient Leaching Cornell University

    Nitrate leaching is also a signicant source of soil acidication. In humid climates, some nutrient leaching occurs even under natural vegetation, but agricultural activities can greatly increase leaching losses Havlin et al., 1999. Soil and climatic factors that inuence nutrient leaching

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  • Nitrate leaching in the Norsminde catchment

    Nitrate leaching in the Norsminde catchment

    2.2 Nitrate leaching from the root zone The nitrate leaching from the root zone is estimated by an N-balance method, where the annual N leaching is based on existing agricultural management data reported from farm-ers to the authorities and the annual values subsequently converted to daily concentrations by use of the DAISY model - a dynamic ...

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  • Heap leaching as a key technology for recovery of values

    Heap leaching as a key technology for recovery of values

    Heap leaching technology is finding increasingly widespread application to recover values from low-grade ores, especially in the gold and copper industry. The particular attractiveness of the process is the relatively low-cost recovery of the target

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  • Nitrate leaching as a confounding factor in chemical

    Nitrate leaching as a confounding factor in chemical

    Sep 01, 2005 More importantly for recovery prospects in upland regions where S deposition is declining, not only is N deposition expected to decline to a smaller degree than S, but for a given level of N deposition, NO 3 leaching into surface waters may increase in the longer term as N saturation of terrestrial ecosystems occurs gren and Bosatta, 1988 ...

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  • The recovery of rare earth oxides from a phosphoric acid

    The recovery of rare earth oxides from a phosphoric acid

    The rare earth values can be recovered from a leach liquor containing 1.0 M nitric acid and 0.5 M calcium nitrate by the addition of 2.5 M ammonium nitrate and extraction into 33 volv dibutyl butylphosphonate in Shellsol 2325. The organic phase can be stripped with water, preferably at temperatures above ambient, to yield a solution of rare earth nitrates from which the mixed oxide can

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  • Utilization and leaching of nitrate from two Deschampsia

    Utilization and leaching of nitrate from two Deschampsia

    Total leaching of nitrate beyond a depth of 35 cm from the unfertilized Ede columns corresponded to an annual loss of 1.9 kmol N ha-1, whereas leaching was virtually zero from HB columns. Relatively high amounts of N leached from the fertilized columns with apparent fertilizer recovery in the leachate reaching an average 60 at high N.

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  • Stream Runoff and Nitrate Recovery Times After Forest

    Stream Runoff and Nitrate Recovery Times After Forest

    If the controlling factors of runoff and nitrate concentration recovery times are common, it is expected that recovery time of runoff and nitrate leaching following forest disturbance should be similar. While many studies have addressed either runoff or nitrate concentration recovery after disturbance, much less is known about how these two ...

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  • Nitrate Leaching and Nitrogen Recovery Following

    Nitrate Leaching and Nitrogen Recovery Following

    High N fertilizer and irrigation amounts applied to potato Solanum tuberosum L. on coarsetextured soils often result in nitrate NO 3 leaching and low recovery of applied fertilizer N.This 3yr study compared the effects of two rates 140 and 280 kg N ha 1 of a single polyolefincoated urea PCU application versus split applications of urea on Russet Burbank potato yield ...

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  • Using the Leaching Index in a Nutrient Management Plan

    Using the Leaching Index in a Nutrient Management Plan

    The leaching index is an indicator of the relative risk high, moderate, or low that nitrate will leach below the rootzone in a field and contaminate ground and surface water. LI 10 inches indicates a HIGH risk of leaching below the rootzone. LI of 5 to 10 inches indicates a MODERATE risk of leaching below the rootzone. LI 5. inches ...

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  • Nitrate Leaching and Nitrogen Recovery Following

    Nitrate Leaching and Nitrogen Recovery Following

    Under standard irrigation in the third year, leaching from five applications of urea 280 kg N ha 1 was 38 higher than PCU. Under leaching conditions in the first year 25 mm drainage water in at least one 24h period and excessive irrigation in the third year, PCU at 280 kg N ha 1 improved total and marketable tuber yields by 12 to 19 compared with three applications of urea.

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  • Nitrate Leaching and Nitrogen Recovery Following

    Nitrate Leaching and Nitrogen Recovery Following

    However, Wilson et al. 2010 found that nitrate leaching with PCU 21.3 kg N ha 1 was significantly lower than with split-applied soluble N 26.9 kg N ha 1 in potato, and Zvomuya et al ...

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