dissolved fertilizer Articles

  • Fertilizer NPK from human urine and olive oil mill wastewaters

    The objective of this work was to determine how some wastewater acids could be used to prevent the decomposition of urea into ammonia during storage. The effect of storing human urine with olive oil mill wastewaters (OOMW) or water bubbled with CO2 (BW), was studied. Moreover, the application of two levels of urine dissolved in water OOMW, has been studied in relation to the properties of two ...


    By IWA Publishing

  • In-situ comparison of phosphorus losses between organic and inorganic fertilizers

    Phosphorus (P) is one of the limiting factors of eutrophication. P added to soil from fertilizer application could pose a threat to water quality. According to agricultural habits, swine manure (SM), oil cake (OC), biogas slurry (BS), commercial organic fertilizer (OF) and compound fertilizer (CF) were selected to compare their P losses on a slope-land under natural rainfall. The results showed ...


    By IWA Publishing

  • Estimating Phosphorus loss in runoff from manure and fertilizer for a Phosphorus loss quantification tool

    Nonpoint-source pollution of fresh waters by P is a concern because it contributes to accelerated eutrophication. Given the state of the science concerning agricultural P transport, a simple tool to quantify annual, field-scale P loss is a realistic goal. We developed new methods to predict annual dissolved P loss in runoff from surface-applied manures and fertilizers and validated the methods ...

  • Matrix-based fertilizers reduce nutrient and bacterial leaching after manure application in a greenhouse column study

    Received for publication November 7, 2008. We tested the efficacy of matrix-based fertilizers (MBFs) to reduce Escherichia coli and Enterococcus spp., NH4, NO3, dissolved reactive phosphorus (DRP), and total phosphorus (TP) in leachate and soil after dairy manure application in greenhouse column studies. The MBFs are composed of inorganic N and P in compounds that are relatively loosely bound ...

  • Estimation of the degree of soil P saturation from Brazilian Mehlich-1 P data and field investigations on P losses from agricultural sites in Minas Gerais

    The degree of phosphorus saturation (DPS) of agricultural soils is studied worldwide for risk assessment of phosphorus (P) losses. In previous studies, DPS could be reliably estimated from water-soluble P (WSP) for European and Brazilian soils. In the present study, we correlated measured WSP and Mehlich-1 P (M1P) from soils of Minas Gerais (MG) and Pernambuco (PE) (R2 = 0.94, ...


    By IWA Publishing

  • Is colloid-facilitated Phosphorus leaching triggered by Phosphorus accumulation in sandy soils?

    The leaching of colloidal phosphorus (Pcoll) contributes to P losses from agricultural soils. In an irrigation experiment with undisturbed soil columns, we investigated whether the accumulation of P in soils due to excess P additions enhances the leaching of colloids and Pcoll from sandy soils. Furthermore, we hypothesized that large concentrations of Pcoll occur at the onset of leaching events ...

  • Distribution of 15N tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA

    In nitrogen (N) limited ecosystems fertilization by increases in N deposition may enhance plant growth and thus impact carbon (C) sequestration. However in many experimental N fertilization experiments that test this interaction, soils and not plants are the main fate of additional N. A key methodological feature in many N deposition-C sequestration experiments is the addition of N directly to ...


    By University of Maine

  • Agriculture Plant Nursery - Case Study

    Challenge A plant nursery company had water quality issues from the well water source that there were using for irrigation purposes in their plant growing operations. These water quality issues including total dissolved salts (TDS) around 2500 mg/l, as well as turbidity, mineral hardness and microbiological contaminants. The plants were slow growing. ...

  • GWT Case Study - Agriculture Processing Sector

    Application Case Studies - Agriculture Plant Nursery Challenge A plant nursery company had water quality issues from the well water source that there were using for irrigation purposes in their plant growing operations. These water quality issues including total dissolved salts (TDS) around 2500 mg/l, as well as turbidity, mineral hardness ...

  • Evaluating slurry broadcasting and injection to ley for Phosphorus losses and fecal microorganisms in surface runoff

    The recent growth in the size of dairy cattle farms and the concentration of farms into smaller areas in Finland may increase local water pollution due to increased manure production and slurry application to grass. Therefore, a field study was conducted to monitor losses of total phosphorus (TP), dissolved reactive phosphorus (DRP), and fecal microorganisms in surface runoff from a perennial ...

  • Critical source area management of agricultural phosphorus: experiences, challenges and opportunities

    The concept of critical source areas of phosphorus (P) loss produced by coinciding source and transport factors has been studied since the mid 1990s. It is widely recognized that identification of such areas has led to targeting of management strategies and conservation practices that more effectively mitigate P transfers from agricultural landscapes to surface waters. Such was the purpose of P ...


    By IWA Publishing

  • Questions and answers about Lake Erie toxic algae

    Hundreds of thousands of people in Toledo, Ohio, and nearby southeastern Michigan were unable to use tap water fromSaturday until Monday morning because of unsafe levels of a contaminant called microcystin in Lake Erie. Here are questions and answers about the situation: Q. What is microcystin? A. A toxin produced by microcystis, a type of ...


    By Associated Press

  • Effect of AgraGel T-400 on tomato crops, U. of Valparaiso, Chile - Case Study

    Introduction At present, a great part of vegetable production in Chile is dedicated to industrial agronomy and one of the most important products is the tomato crop for industrial processing. Chile has a capacity of 180,000 tons of tomatoes per year, which is equivalent to 12,000 hectares of crop land. Among canned products tomato paste represents 38%. This is an important employment ...

  • How the Earthworm Improves the Soil

    Nature has ways of converting vegetable and mineral raw materials into high-quality products. The inconspicuous earthworm provides striking example — it is a minirefinery in the soil. The dew worm or common earthworm, which is native to Europe, is just one of more than 3000 earthworm species in the world. About 30 centimeters long, the powerful earthworm digs ...


    By Sulzer Ltd.

  • Financing an anaerobic digester

    LENDERS are generally well disposed to projects that diversify revenues while lowering costs and mitigating risks. Add a ready source of equity and you are well on the way toward financing a project that is a win-win proposition for the lender and the project developer. Such is the case with the anaerobic digester project at Geerlings Hillside Farm (GHF). The Geerlings's 8,000-head hog farm is ...


    By BioCycle Magazine

  • Towards climate-responsible peatlands management

    Peatlands are lands with a naturally accumulated peat layer at their surface. They are found all over the world and come in many forms, display many different characteristics and are used in many different ways. Even though peatlands extend over a relatively small portion of the earth’s land surface, they hold a large pool of carbon. There is no universal definition of peatlands. For the ...


    By Wetlands International

  • 19 Things the AP Got Wrong

    The Associated Press recently published an article on “the secret environmental cost of U.S. ethanol policy.” There is much in this article that is too misleading, poor or deficient analysis, over-simplistic, or poorly drawn conclusions to comment on, but here are 19 big things the AP got wrong. ...


    By National Farmers Union (NFU)

  • Floating Fish Feed Machine in Negria

    Nigeria is one of the largest fish consumers in the world. Since the demand of fish is increasing continuously, many farmers have started fish farming in small scale for fulfilling their daily family demands or in large scale for making more profit. Commercial fish farming in Nigeria has great opportunities. One of significant factors in fish farming is fish feed which can offer fish better ...

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