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  1. 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 ...

  2. Crop Response to Potassium Fertilizer in Ohio

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-04/crop-response-potassium-fertilizer-ohio

    of yield penalty with no K application decreases as soil K levels go above 100 ppm. If the soil test ... (2023) classified Mehlich-3 soil K levels into <70, 70-100, 100-130, 130-160, and >160 ppm to ... yield, the higher the yield increase from K fertilizer.   Generally, as the soil test K levels decreased, ...

  3. SCN and Soil Health Testing Opportunity for Ohio Growers

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-15/scn-and-soil-health-testing-opportunity-ohio-growers

    during, or after planting. Conducting a soil test in spring will indicate if SCN is present and the levels ... utilized for SCN testing. Additionally, by submitting your soil samples for SCN testing to our lab, you ... determine the most effective management strategy. It is crucial, therefore, to test your fields and know ...

  4. Crop Response to Phosphorus Fertilizer in Ohio

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-03/crop-response-phosphorus-fertilizer-ohio

    soil P levels go above 20 ppm. If the soil test P level is less than 20 ppm, there is an increased risk ... less than 10 ppm, the median relative yield was 87%. As the soil test P level increased above the ... the Mehlich-3 soil test P level. The Mehlich-3 soil P measures the readily available soil P for crop ...

  5. 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 ...

  6. Regional Updates: May 21 – 28, 2024

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-16/regional-updates-may-21-%E2%80%93-28-2024

    report emergence issues in earlier planted corn and soybean fields from soil crusting and in some cases ... some emergence issues are being reported from soil crusting and now excess moisture. In parts of ... planting, corn side-dressing, and post-herbicide applications. Emerged soybeans are between VE and V2 growth ...

  7. Battle for the Belt: Season 2 Episode 8- Bean Leaf Beetle

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-15/battle-belt-season-2-episode-8-bean-leaf-beetle

    defoliation levels ranging from 5% to 50% (Soybean defoliation Final.pdf (osu.edu)). Comprehensivley sampling ... their preferred host plant. Early planted soybeans therefore have a higher risk for feeding damage from ... adults will feed on the soybean and lay eggs in the soil. Scouting and Management Early season, our main ...

  8. Potassium Uptake and Ohio Crop Response

    https://ohioline.osu.edu/factsheet/anr-0147

    a measure of the risk of yield loss at a given soil-test K level without fertilizer applied during the ... total K content of Ohio soils is between 12,500 ppm and 30,500 ppm (Ames & Gaither, 1913). Even ... yield. For loams and clays, this would be 170 ppm; for sandy soils, it is 130 ppm. The range of soil test ...

  9. 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 ...

  10. Spring Forage Establishment

    https://agcrops.osu.edu/newsletter/corn-newsletter/2024-08/spring-forage-establishment

    Recommendations (https://forages.osu.edu/forage-management/soil-fertility-forages). Phosphorus levels for grass ... are optimal in the 20-40 ppm range, while the range for legumes is 30-50 ppm. When it comes to ... potassium the optimal range is 100-130 ppm for sandy soils with a CEC less than 5, for loam and clay soils ...

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