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  1. Ohio Data That Shaped the Tri-State Fertilizer Recommendations

    https://ohioline.osu.edu/factsheet/agf-518

    that very low soil test levels require high fertilizer rates, but as soil test levels increase, our ... able to answer the question, “At what soil test level should I apply fertilizer to see a yield ... response?” To answer this question, we need to establish a critical soil test level.  For each trial, we ...

  2. Developing Phosphorus and Potassium Recommendations for Field Crops

    https://ohioline.osu.edu/factsheet/agf-0515

    determined using field studies to correlate soil test levels to crop yield response. Ohio data was used to ... This framework strives to build soil test levels up to and beyond a critical level, and then maintain ... these levels over time. The critical level is a key component to this framework. Soil test levels above ...

  3. Worsening Drought Conditions Across Southern Ohio

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-24/worsening-drought-conditions-across-southern-ohio

    lack of soil moisture, poor pasture conditions, and short-cuttings of hay. Producers are encouraged to ... possible on Tuesday through Thursday this week, before high pressure and drier air moves in for the ... forecasting 0.01-0.50” for the state over the next 7 days (Figure 2), though locally heavier amounts are ...

  4. Calculating Cation Exchange Capacity, Base Saturation, and Calcium Saturation

    https://ohioline.osu.edu/factsheet/anr-81

    example of typical soil test levels in Ohio (in ppm). We can calculate the collective charge each cation ... by the soil test levels. For calcium, a soil test level of 2000 ppm, divided by 200 equals 10.0 ... (ppm) to meq/100 g soil for base and acid cations to determine CEC. Base Cation Soil test level (ppm ...

  5. Nutrient Management of Forage Crops Intended for Hay

    https://ohioline.osu.edu/factsheet/anr-0109

    is to maintain soil test P and K between the “critical level” (minimum) and “maintenance limit” ... level before planting. The estimated amount of P 2 O 5 required to raise a soil test 1 PPM is 20 pounds ... For example, if a soil test is 100 PPM and the goal is to increase the soil test to a critical level ...

  6. Cross and Drewry investigate machine learning for soil heat flux in newly published article

    https://fabe.osu.edu/news/cross-and-drewry-investigate-machine-learning-soil-heat-flux-newly-published-article

    a publication of high-quality, peer-reviewed articles on all aspects of computational ecology, data science, ... biogeography, and ecosystem analysis. The article, titled "Ensemble machine learning for interpretable soil ... heat flux estimation" focuses on accurately estimating soil heat flux (SHF), crucial for ...

  7. Nutrient Management Field Day

    https://agcrops.osu.edu/events/nutrient-management-field-day

    Water Quality Team Report – Amber Herman, Water Quality Extension Associate Soil Biology Testing Options ... – Russ Rice & Alan Sundermeier, CAP Coordinators Meal included: Loaded Lunchbox food truck. Soil and ...

  8. Ammonia Emission from Animal Feeding Operations and Its Impacts

    https://ohioline.osu.edu/factsheet/AEX-723.1

    50 ppm, increased levels of keratoconjunctivitis and tracheitis have been observed. These trachea and ... causes high ammonia levels inside animal production buildings, especially in winter months when the ... concentrations. People begin to detect odors at 5–50 ppm. Irritation to mucous surfaces occurs at 100–500 ppm ...

  9. Fertility Management of Meadows

    https://ohioline.osu.edu/factsheet/anr-5

    nutrition, forage test to check for adequate levels. When the soil pH is below 5.0, aluminum availability ... critical soil test level of 15-25 parts per million (ppm) phosphorus for Bray P1 test results or 28-40 ppm ... leaching. The critical soil test levels for potassium are 125-200 ppm. Plants have the ability to take up ...

  10. Forage Testing for Beef Cattle

    https://ohioline.osu.edu/factsheet/anr-0149

    0.12% Mg. High soil potassium levels are associated with increased incidence of grass tetany. The ratio ... (ppm). If the forage contains a high level of molybdenum (2 ppm) or sulfur at 0.25%, Cu could be ... samples are low in Zn. The recommended levels for zinc are between 30 and 1,000 parts per million (ppm ...

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