CONTACT US

Our Address

Science Avenue, High-tech Zone, Zhengzhou City, Henan Province, China

  • Five Ways to Minimize Nitrate Leaching - Smart Fertilizer

    APPLY THE RIGHT RATE OF FERTILIZER. First and foremost, over-fertilization is a problem to
  • National Map of Nitrate Leaching - Landcare Research

    The nitrate leaching rates per stock unit can then be combined with a map of stock units (see the pamphlet on National map of stock units) to produce a map of nitrate-N leaching at the national scale. The leaching rates per stock unit shown in Figure 1 are

  • Nitrate N loss by leaching and surface runoff in ...

    The nitrate leaching amount is the product of nitrate concentrations in soil solution and downward water fluxes, both of which together control nitrate leaching. Water is the most important factor for crop production. Agriculture is conducted either in wetlands including sub-humid and humid regions or drylands including arid and semiarid areas ...

  • Cited by: 3
  • Nitrate Leaching - Foundation for Arable Research

    Nitrate Leaching Nitrate leaching is a naturally occurring process, it occurs when nitrate leaves the soil in drainage water. Nitrate is soluble and mobile. It is no problem when it is within the root-zone, but once it gets into the ground water and other fresh water bodies it is an environmental pollutant.

  • Monitoring of Nitrate Leaching in Sandy Soils: Comparison ...

    creased N leaching by 64, 59, and 32%, respectively, for pepper, to-mato, and zucchini crops. Independent of the irrigation treatment or nitrogen rate, N leaching values measured from the ceramic cup lysimeter-based N leaching values were lower than the values from the drainage lysimeter and soil coring methods. However, overall nitrate

  • The New York Nitrate Leaching Index

    nitrate leaching below the root zone is low. An LI greater than 10 indicates that the potential for nitrate leaching below the root zone is high while LI’s between 2 and 10 are considered intermediate. In order to meet the N leaching requirements of the NRCS Nutrient Management Standard (590), producers are expected to implement best management

  • (PDF) Nitrate accumulation and leaching potential is ...

    Nitrate accumulation and leaching potential is controlled by land-use and extreme precipitation in a headwater catchment in the North China Plain. ... Thailand. Ag r. Water Manage. 52, 197 ...

  • Nitrate accumulation and leaching potential is controlled ...

    Nitrate leaching often happens in irrigated cropping systems or humid climates, where a considerable amount of water infiltrates the soil profile below the root zone (Gallejones et al., 2012; Huang et al., 2018). Nitrate leaching rarely happens in arid or semi-arid regions due to higher rates of evaporation compared with the rate of precipitation.

  • NITRATE LEACHING IN FLORIDA URBAN ENVIRONMENTS

    soil. Di and Cameron (2002) in their study of nitrate leaching noted that significant amounts of soil organic N are mineralized and there generally are low concentrations of ammonium ions in the soil. Organic and inorganic (non-nitrate) N-compound transformations into nitrate result in nitrate becoming the dominant ion in aerated soil conditions.

  • (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 ...

  • Nitrate leaching from arable and horticultural land ...

    Jan 19, 2006  MAFF's Nitrate Research Programme for arable and horticultural crops aims to reduce nitrate leaching and maintain productive farming through Best Management Practice. The Programme has led to the development and testing of methods to measure nitrate leaching, the identification of ‘leaky’ crops, soils and practices, and strategies to ...

  • Estimation of the Effect of Soil Texture on Nitrate ...

    The use of chemical fertilizers in Thailand increased exponentially by more than 100-fold from 1961 to 2004. Intensification of agricultural production causes several potential risks to water supplies, especially nitrate-nitrogen (NO 3 −-N) pollution.Nitrate is considered a potential pollutant because its excess application can move into streams by runoff and into groundwater by leaching.

  • Nitrate Accumulation and Leaching in Surface and Ground ...

    To evaluate the process of nitrate accumulation and leaching in surface and ground water, we conducted simulated rainfall experiments. The experiments were performed in areas of 5.3 m2 with bare slopes of 3° that were treated with two nitrogen fertilizer inputs, high (22.5 g/m2 NH4NO3) and control (no fertilizer), and subjected to 2 hours of rainfall, with.

  • Nitrate-Nitrogen Leaching and Modeling in Intensive ...

    Jul 30, 2013  Protecting water resources from nitrate-nitrogen (NO 3-N) contamination is an important public health concern and a major national environmental issue in China.Loss of NO 3-N in soils due to leaching is not only one of the most important problems in agriculture farming, but is also the main factor causing nitrogen pollution in aquatic environments.. Three typical intensive agriculture ...

  • Reduced nitrate leaching in a perennial grain crop ...

    Nov 21, 2018  Nitrate nitrogen (NO 3-N) leaching from fertilized annual crops can contaminate groundwater and pollute natural aquatic ecosystems and rural drinking water sources. Intermediate wheatgrass (IWG; Thinopyrum intermedium ) is a perennial grass being domesticated to serve as the world’s first widely available perennial grain crop.

  • Nitrate leaching from open-field and greenhouse vegetable ...

    The potential for nitrate leaching in Chinese vegetable systems is substantial because of high inputs of nitrogen (N) fertilizer and water. To quantify the nitrate leaching and identify the key controlling factors in Chinese vegetable systems, we conducted a meta-analysis that included 221 data sets from 18 field studies. The results revealed that nitrate leaching over the entire crop growing ...

  • Nitrate leaching from livestock Stats NZ

    Of nitrate leached from livestock, 65% was from dairy, and 15% from sheep in 2017.

  • Nitrate and phosphorus leaching in New Zealand: a national ...

    To help understand the sources of dissolved nutrients, we estimated and mapped subsurface flow (i.e. leaching) losses of nitrate and DRP. There are large areas of high nitrate leaching in Waikato, Bay of Plenty, Taranaki and Canterbury. The high spatial detail of the maps permits use for planning mitigation at local, regional and national scales.

  • Comparisons of methods for measuring the leaching of ...

    M. A. Shepherd, E. I. Lord, Nitrate leaching from a sandy soil: the effect of previous crop and post-harvest soil management in an arable rotation, The Journal of Agricultural Science, 10.1017/S002185960007800X, 127, 02, (215), (2009).

  • Got Nitrate LeachingMethods to Measure

    Nitrate leaching was measured using mesh bags of positively charged resin beads (resin bags) buried 12 inches deep in the soil. The resin bags trap nitrate dissolved in water percolating through the soil because nitrate is a negatively charged molecule and the resin bags are positively charged. We placed the resin bags in the soil in August or ...

  • Estimation of the Effect of Soil Texture on Nitrate ...

    The use of chemical fertilizers in Thailand increased exponentially by more than 100-fold from 1961 to 2004. Intensification of agricultural production causes several potential risks to water supplies, especially nitrate-nitrogen (NO3−-N) pollution. Nitrate is considered a potential pollutant because its excess application can move into streams by runoff and into groundwater by leaching.

  • Nitrogen leaching and soil nitrate, nitrite, and ammonium ...

    Understanding N leaching from fertilized agricul- vestigation of N trace-gas emissions, soil N cycling, N ture is important for several reasons. First, the largest leaching losses, crop yield and grain quality, and the components of N leachate, nitrate (NO ) and nitrite

  • Cover Crops Reduce Nitrate Leaching in Agroecosystems: A ...

    − leaching and should be integrated into cropping systems to improve water quality. Cover Crops Reduce Nitrate Leaching in Agroecosystems: A Global Meta-Analysis Resham Thapa, Steven B. Mirsky, and Katherine L. Tully* T he invention of the Haber–Bosch process in the 20th century exponentially increased the production and con -

  • Nitrate leaching in Canterbury water: Need for study ...

    Jun 14, 2019  A Danish study has found a connection between colorectal cancer and even very low nitrate levels. Canterbury's medical officer of health Alistair Humphrey said it was time a similar study was done because the region had high rates of bowel cancer and

  • Estimation of the Effect of Soil Texture on Nitrate ...

    The use of chemical fertilizers in Thailand increased exponentially by more than 100-fold from 1961 to 2004. Intensification of agricultural production causes several potential risks to water supplies, especially nitrate-nitrogen (NO3−-N) pollution. Nitrate is considered a potential pollutant because its excess application can move into streams by runoff and into groundwater by leaching.

  • Nitrogen leaching and soil nitrate, nitrite, and ammonium ...

    Understanding N leaching from fertilized agricul- vestigation of N trace-gas emissions, soil N cycling, N ture is important for several reasons. First, the largest leaching losses, crop yield and grain quality, and the components of N leachate, nitrate (NO ) and nitrite

  • Cover Crops Reduce Nitrate Leaching in Agroecosystems: A ...

    − leaching and should be integrated into cropping systems to improve water quality. Cover Crops Reduce Nitrate Leaching in Agroecosystems: A Global Meta-Analysis Resham Thapa, Steven B. Mirsky, and Katherine L. Tully* T he invention of the Haber–Bosch process in the 20th century exponentially increased the production and con -

  • Nitrate leaching in Canterbury water: Need for study ...

    Jun 14, 2019  A Danish study has found a connection between colorectal cancer and even very low nitrate levels. Canterbury's medical officer of health Alistair Humphrey said it was time a similar study was done because the region had high rates of bowel cancer and

  • Nitrate leaching from livestock in New Zealand - Figure.NZ

    Data is sourced from Manaaki Whenua, and compiled following the methodology of Dymond et al (2013). model takes a bottom-up approach, estimating nitrate-nitrogen leaching rates per animal in each area in New Zealand taking into account differences in climate, soil type, and irrigation.

  • Winning Candidates of CLIFF-GRADS Round 4 Announced ...

    We are excited to announce that 57 PhD candidates from 20 developing countries will receive scholarships in Round 4 of the Climate, Food and Farming – Global Research Alliance on Agricultural Greenhouse Gases Development Scholarships programme (CLIFF-GRADS). Increasing interest in the CLIFF-GRADS Programme has seen the number of recipients in this scholarship Round double after []

  • Nitrogen Management to Reduce Nitrate Leaching while ...

    The extent of nitrate leaching is controlled by two factors: a) the concentration of nitrate-N in the soil solution and b) the quantity of soil solution that moves from the root zone. Therefore, there is a need for managing both nitrogen and water (irrigation and precipitation) in corn to achieve the most economic production while maintaining ...

  • Chapter 7 Nutrient Leaching - Cornell University

    Nitrate leaching is also a significant source of soil acidification. 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 influence nutrient leaching

  • Water quality: Evaluation of nitrate leaching potential in ...

    The factors affecting the risk of nitrate leaching are: irrigation schedule > climatic variability = N application rate. Linking a validated simulation model with a solid survey data base provides a valuable tool in site specific assessment and prescription of best irrigation and N management practices for the glacial outwash soils of the North ...

  • Nitrogen - International Plant Nutrition Institute

    Nitrate leaching only occurs when water is passing through the soil, so the extent of nitrate leaching is related to the amount of water percolation. Any water management practice that limits percolation can limit nitrate loss. In much of the western U.S., water loss through evaporation and plant transpiration (ET) far exceeds the amount of ...

  • Nitrate leaching losses and pasture yields as affected by ...

    Jun 21, 2007  Nitrate (NO 3 − ) leaching and water contamination is a major environmental issue around the globe. In grazed grassland, most of the nitrate leaching occurs under the animal urine patch areas because of high nitrogen (N) loading rates. The aim of this study was to determine NO 3 – -N leaching losses and pasture responses as affected by different animal urine-N loading rates and

  • Nitrate leaching in lettuce production – may be difficult ...

    Apr 23, 2010  Nitrate leaching from vegetable production along the Central Coast is under greater scrutiny and is the subject of proposed regulations by the Regional Water Quality Control Board (RWQCB). The regulations as written have stipulated that leachate from agricultural lands should not exceed the public health limits for nitrate in drinking water of ...

  • Crop and Fertilizer Management Practices to Minimize ...

    August to April) soil nitrate increased from fall to spring by up to 40 lb N/acre (Jones unpubl. data) due to organic matter decomposition. Because of the soil’s overwinter nitrate gain from organic matter decomposition, actual N lost to leaching in the wet year was likely higher than 25 lb N/acre. A total of up to 65 lb N/acre could have

  • Nitrate Leaching - No-till Farming

    Here’s a system that can give you higher no-till yields, less nitrate leaching and reduce opener freeze up. By Frank Lessiter posted on August 1, 2000 Posted in Nutrient Management With growing concern over the efficient use of nitrogen, a new system for applying anhydrous ammonia more accurately may be just the ticket for no-tillers.

  • Water balance and nitrate leaching in an irrigated maize ...

    Asadi, Mohammad Esmaeil Clemente, Roberto S. Gupta, Ashim Das Loof, Rainer Hansen, Gunner K., 2002. "Impacts of fertigation via sprinkler irrigation on nitrate leaching and corn yield in an acid-sulphate soil in Thailand," Agricultural Water Management, Elsevier,

  • Nitrate leaching in a corn silage field fertigated via ...

    No nitrate leaching occurred from the 0.85 ET c and 0.7 ET c treatments. The major portion of the fertilizer that was applied for 0.85 ET c and 0.7 ET c treatments remained unused in the soil, while a small amount was taken up by the corn crop and the remainder was volatilized.

  • CiteSeerX — Monitoring of Nitrogen Leaching from a ...

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): A study on monitoring of nitrogen (N) leaching was conducted in acid- sulfate clayey soil in the central region of Thailand. The objective was to measure the N leaching to shallow groundwater from a tropical paddy field to assess the consequences of agricultural management practices.

  • Human health effects of a changing global nitrogen cycle

    Changes to the global nitrogen cycle affect human health well beyond the associated benefits of increased food production. Many intensively fertilized crops become animal feed, helping to create disp...

  • Biochar Amendment Experiments in Thailand: Practical ...

    Biochar for the mitigation of nitrate leaching from soil amended with biosolids. ... Petchburi, Thailand: Huay Sai Royal Development Study Center. Sriburi, T. (2013). Evaluating the Life Cycle of Greenhouse Gas Emissions and Retention from a Project for Sustainable Development, Huay Sai Royal Development Study Center, Petchburi.

  • Quantifying the Effect of Ammonium Nitrate Attack on ...

    leaching takes place. Agostini et al. [7] conducted an experimental study on two thin walled hollow cylinders of mortar with two different initial porosities. These two mortars were degraded by using ammonium nitrate solution. The leaching effects were measured by obtaining the variations in mechanical and hydraulic properties. There was

  • Monitoring of Nitrogen Leaching from a Tropical Paddy in ...

    Leaching loss was calculated from daily fluxes of water percolation and soil water N concentrations extracted by vacuum lysimeter. Based on three month observation, average leaching of nitrate nitrogen (NO- 3-N), ammonium nitrogen (NH4 +-N) and total Kjeldahl nitrogen (TKN) to groundwater was found 0.04, 0.11 and 0.17 kg ha-1d-1 respectively.

  • Nitrogen leaching from soil treated with sludge Water ...

    Oct 01, 2001  The experiment was conducted at Kasetsart University, Bangkhen Campus, Bangkok, Thailand. Average nitrogen leach in the form of NO 3 − was 25 times more concentrated than the NH 4 +. Nitrate concentrations in the leachate exceeded the drinking water standard.

  • Effects of Controlled Irrigation and Drainage on Nitrogen ...

    Controlled irrigation and drainage (CID) has received attention for improving water quality. Under CID condition, water stress is frequently experienced in two contexts: first drought and then flooding (FDTF) and first flooding and then drought (FFTD). This study aimed to investigate the effects of FDTF and FFTD on nitrogen (N) and phosphorus (P) dynamics in paddy water at different growth stages.

  • GIS-based and laboratory-scaled leaching assessment of ...

    Nitrate, from natural and human activities, is considered a common agricultural contaminant. The immediate health effect is methemoglobinemia (i.e., the reduction of nitrate in the digestive tract by nitrate-reducing bacteria and the nitrate combines with the hemoglobin that carries oxygen forming methemoglobin which can no longer carry oxygen).

  • Vegetables Industry 2020 - ReportLinker

    Squalene Market by Source Type, Vegetable Source, Biosynthetic, End-use Industry And Region - Global Forecast to 2024 August 2019 $ 4950 Vegetable Wax Market - Global Outlook and Forecast 2020-2025 : April 2020 $ 3500 GLOBAL FRUIT AND VEGETABLE JUICE MARKET - GROWTH, TRENDS AND FORECAST(2019-2024) : April 2019

  • Utilization and leaching of nitrate from two Deschampsia ...

    the plant cover had been removed, apparent and real leaching losses reached values of >100 and 10% of the applied N, respectively. Hence, soil-derived N appeared by far the major source of leaching. Unplanted and unfertilized HB columns displayed high rates of nitrification and leached high amounts of nitrate, suggesting a plant-induced

  • Soy Bioterrorism - The Weston A. Price Foundation

    This results in eutrophication—nitrate leaching—which then leads to destruction of mangroves, coral reefs and other marine ecosystems that serve as the nurseries for the world’s fish.

  • Fertigation - Wikipedia

    Fertigation is the injection of fertilizers, used for soil amendments, water amendments and other water-soluble products into an irrigation system.. Fertigation is related to chemigation, the injection of chemicals into an irrigation system.The two terms are sometimes used interchangeably however chemigation is generally a more controlled and regulated process due to the nature of the ...