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  1. 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 ...

  2. Understanding How Soil Test Phosphorus Impacts Water Quality

    https://ohioline.osu.edu/factsheet/anr-0111

    Soil test P is one indicator of environmental P loss potential from a field. STP values above 100 ppm ... Tests as Risk Indicators for Leaching of Dissolved Phosphorus from Agricultural Soils in Ontario. Soil ... called eutrophication, results in depleted dissolved oxygen in water bodies. A soil test for P (STP) ...

  3. Application of Manure to Double Crop Soybeans to Encourage Emergence

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-20/application-manure-double-crop-soybeans-encourage-emergence

    soybeans were properly covered with soil when planted to keep a barrier between the salt and nitrogen in ... soil phosphorus levels, and the phosphorus in the manure being applied, so soil phosphorus levels are ... unless one uses a Grassland applicator toolbar or perhaps an Aerway set on maximum soil disturbance. If ...

  4. Soil Phosphorus and Crop Response to Phosphorus Fertilizer in Ohio

    https://ohioline.osu.edu/factsheet/anr-0146

    responding to applied P can best be predicted by soil-test P levels. Recently, Culman et al. (2023) published ... 29.9% of trials, soybean in 14.2% of trials, and wheat in 36.8% trials. Critical soil test levels ranged ... Furthermore, the risk of yield loss with no P application decreased as the soil P level increased. As per the ...

  5. Regional Updates: June 18 – 24, 2024

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-20/regional-updates-june-18-%E2%80%93-24-2024

    Nick Eckel reported that soil conditions remain dry in northwest Ohio with rainfall anywhere between ... wheat harvest began late last week in Central and West Central Ohio, with an estimated 25-50% of fields ... harvested in the region. Reported yields have ranged between 80 and 115 bu/ac. Area growers have taken ...

  6. 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 ...

  7. 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 ...

  8. 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 ...

  9. 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 ...

  10. Battle for the Belt: Season 2 Episode 11- Freeze-Damaged Corn Update

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-18/battle-belt-season-2-episode-11-freeze-damaged-corn-update

    k&list=PLYlh_BdeqniJ4J-htcJ9Z5MjULk3E8Eqk&index=23&t=1s In Episode 11, we join Taylor Dill, PhD student for ... Battle for the Belt, for a field update on freeze-damaged corn. Freeze damage is a risk when corn and ... Research Station. Corn planted on March 25 th sustained freeze damage between April 21 st and 22 nd with ...

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