agriculture soil testing Articles

  • Manioc peel and charcoal: a potential organic amendment for sustainable soil fertility in the tropics

    In tropical areas, where crop production is limited by low soil quality, the development of techniques improving soil fertility without damage to the environment is a priority. In French Guiana, we used subsistence farmer plots on poor acidic soils to test the effect of different organic amendments, bitter manioc peel (M), sawdust (Sw) and charcoal (Ch), on soil nutrient content, earthworm ...


    By Springer

  • Effect of tillage and rainfall on transport of manure-applied cryptosporidium parvum oocysts through soil

    Received for publication September 30, 2008. Most waterborne outbreaks of cryptosporidiosis have been attributed to agricultural sources due to the high prevalence of Cryptosporidium oocysts in animal wastes and manure spreading on farmlands. No-till, an effective conservation practice, often results in soil having higher water infiltration and percolation rates than conventional tillage. We ...

  • Selecting and applying cesium-137 conversion models to estimate soil erosion rates in cultivated fields

    Received for publication April 19, 2009. The fallout radionuclide cesium-137 (137Cs) has been successfully used in soil erosion studies worldwide. However, discrepancies often exist between the erosion rates estimated using various conversion models. As a result, there is often confusion in the use of the various models and in the interpretation of the data. Therefore, the objective of this study ...

  • Crop rotation and nitrogen input effects on soil fertility, maize mineral nutrition, yield, and seed composition

    Knowledge of complex relationships between soils, crops, and management practices is necessary to develop sustainable agricultural production systems. Objectives were to determine how maize (Zea mays L.) would respond to monoculture (C-C), 2-yr rotation (C-S) with soybean [Glycine max (L.) Merr.], or 4-yr rotation (C-S-W/A-A) with soybean, wheat (Triticum aestivum L.), and alfalfa (Medicago ...

  • Three experimental systems to evaluate phosphorus supply from enhanced granulated manure ash

    Three experimental systems were used to evaluate a new P fertilizer since residual P levels at typical farm sites may make response detection unlikely. The systems were (i) greenhouse with low P soil, (ii) long-term research sites with preexisting soil P gradients, and (iii) agricultural fields with prior P fertilization based on agronomic recommendations. The new fertilizer (animal waste ...

  • Nutrient transport characteristics of livestock manure in a farmlan

    Background :Livestock excretions containing high concentration of nutrient, pig liquid fertilizer, and cattle manure were applied to agricultural land. The characteristics of nutrient transport were examined in surface runoff and groundwater by an artificial rainfall event at real scale field site. Also, the effects of the artificial rainfall event on the characteristics of residual soil after ...

  • Parameterization and evaluation of the aquacrop model for full and deficit irrigated cotton

    Predicting yield is increasingly important to optimize irrigation under limited available water for enhanced sustainability and profitable production. Food and Agriculture Organization (FAO) of the United Nations addresses this need by providing a yield response to water simulation model (AquaCrop) with limited sophistication. In this study, AquaCrop was parameterized and tested for cotton ...

  • Inside stories on climate compatible development: Zambia

    Production of staple crops, such as maize, is under increasing risk in Africa because of climate change and depleting soil fertility. The potential consequences for food security are dire. Climate change and food security must be tackled together. Modern methods of agroforestry and “conservation agriculture with trees” are employing age-old indigenous practices of natural ...

  • Fate and effects of clothianidin in fields using conservation practices

    Despite the extensive use of the neonicotinoid insecticide clothianidin, and its known toxicity to beneficial insects like pollinators, little attention has been given to its fate under agricultural field conditions. The present study investigated the fate and toxicity of clothianidin applied every other year as a corn seed‐coating at two different rates, i.e., 0.25 and 0.50 mg/seed, in an ...


    By John Wiley & Sons, Ltd.

  • One crop, two ways, multiple benefits

    Nitrogen fixation is one of the best examples of cooperation in nature. Soil microbes – naturally occurring bacteria in the soil – work with plants to pull nitrogen from the air. They turn the nitrogen into a form the plant is able to use. In return, the plant lets the microbes eat some of the sugars it makes. Faba beans (also called fava beans) are one example of plants that work ...

  • Pesticide runoff from greenhouse production

    A research has been undertaken studying pesticide residues in water from greenhouses and the use of soils and filter materials to reduce such losses. The pesticides detected in water samples collected downstream greenhouses include 9 fungicides, 5 herbicides and 4 insecticides. 10 compounds from flower and vegetable productions were frequently found to exceed environmental risk levels, and with a ...


    By IWA Publishing

  • 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 ...

  • Net biome productivity of irrigated and rainfed maize–soybean rotations: modeling vs. Measurements

    Estimates of agricultural C sequestration require an understanding of how net ecosystem productivity (NEP) and net biome productivity (NBP) are affected by land use. Such estimates will most likely be made using mathematical models that have undergone well-constrained tests against field measurements of CO2 exchange as affected by management. We tested a hydraulically driven soil–plant–atmosphere ...

  • Compost Science & Utilization: Current research

    Materials and Methods Composting To Eradicate Fusarium Graminearum From Infested Livestock FeedInvestigators: Francis J. Larney, Agriculture and Agri-Food Canada, Research Centre, Lethbridge, Alberta, Canada; T. Kelly Turkington, Agriculture and Agri-Food Canada, Research Centre, Lacombe, Alberta, Canada Objectives: Fusarium head blight, caused by Fusarium graminearum, could potentially become a ...


    By BioCycle Magazine

  • Composting Livestock Mortalities

    Performance, composting methods, environmental impacts and biosecurity of the process are evaluated for emergency disposal of cattle by research team at Iowa State University. A THREE-YEAR study was commissioned by the Iowa Department of Natural Resources to evaluate the practical feasibility, performance, environmental impacts and biosecurity of using composting for emergency disposal - should a ...


    By BioCycle Magazine

  • Registration Options For Compost Products

    THE American Association of Plant Food Control Officials (AAPFCO) is a volunteer organization of state Department of Agriculture (DOA) officials whose offices regulate the distribution and sale of fertilizer, soil amendments and liming agents in each state in the United States, its territories, as well as Canada. Over the past ten years, the U.S. Composting Council (USCC) - through its Committees ...


    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

  • 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

  • Woodland Burial Sites

    The Funeralcare Co-operative Plan Bee Wildflower Meadow Creation As part of the ambitious Plan Bee project (which aims to save the plight of honey bees and pollinators across the UK), the Funeralcare Co-operative Woodland Burial Sites have been awarded funding to create bee friendly wildflower corridors. BritishFlora are managing the habitat ...


    By BritishFlora

  • Current research projects

    Phosphorus availability as influenced by organic residues in five calcareous soilsInvestigator: Mohsen Jalali, Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, IranObjectives: To investigate the effect of time and organic residue addition on P availability in some calcareous soils. The use of organic residue is appropriate in maintaining long-term ...


    By BioCycle Magazine

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