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  1. Plan Now for Fall Fertilization of Perennial Forages

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-26/plan-now-fall-fertilization-perennial-forages

    When soil test P exceeds the agronomic level of 50 PPM, there is increased  potential of P losses into ... For example, many dairies have high levels of soil P, making the expense of fertilizer P unnecessary. ... over-application harms the environment and can harm animals fed those forages. A recent soil test should always ...

  2. Interpreting a Soil Test Report

    https://ohioline.osu.edu/factsheet/agf-0514

    suitability to grow a chosen crop. Phosphorous and potassium soil test levels help us know if fertilizer is ... are rare in Ohio. Magnesium (Mg) 50–1,000 100–2,000 Levels less than 20 ppm are a concern. Dolomitic ... recommendation tables, a conversion of P and K soil test values is needed if they are not reported as ppm using ...

  3. Phosphorus Nutrient Management for Yield and Reduced P Loss at Edge of Field

    https://ohioline.osu.edu/factsheet/agf-509

    site and rate criteria from Assessing Nutrient Loss Risk in Ohio (NRCS) between 50 to 200 PPM. Time ... step 7. STP value of 50 PPM Mehlich III or less: CROP YIELD —Reduce risk of crop yield losses with ... available. The maintenance STP range is "critical level" to 40 PPM in corn soybean rotation and 50 ...

  4. Developing Phosphorus and Potassium Recommendations for Field Crops

    https://ohioline.osu.edu/factsheet/AGF-515

    + (0.05 x CEC))] + (YP x CR) + 20 CL is the critical level (100 ppm at a CEC of 10), STL is the soil test ... test results are based on soil calibration studies that correlate soil test levels to crop yield ... crop (buildup stage). Once soil test values reach the critical soil test level, a maintenance approach ...

  5. Seeding Perennial Forages in Late Summer

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-24/seeding-perennial-forages-late-summer

    phosphorus level for forage legumes is 30 to 50 ppm Mehlich-3 and for grasses 20 to 30 ppm Mehlich-3. The ... optimal soil potassium level is 120 to 170 ppm for most of our soils.   Check herbicide history of field. ... contact. Be aware that too much tillage depletes soil moisture and increases the risk of soil crusting. ...

  6. Estimated and Soil Test Methods to Determine Supplemental N need after Flooding

    https://brown.osu.edu/news/estimated-and-soil-test-methods-determine-supplemental-n-need-after-flooding

    than 10 pounds of N for every 2 ppm reduction in soil sample N below the expected levels listed in ... field conditions, an understanding of loss mechanisms and other estimates of loss or soil tests may help ... soil temperatures between 55 to 65 degrees Fahrenheit, approximately 2 to 3% of soil nitrate is lost ...

  7. Estimated and Soil Test Methods to Determine Supplemental N need after Flooding

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-19/estimated-and-soil-test-methods-determine-supplemental-n-need

    than 10 pounds of N for every 2 ppm reduction in soil sample N below the expected levels listed in ... understanding of loss mechanisms and other estimates of loss or soil tests may help decide on 2022 management in ... between 55 to 65 degrees Fahrenheit, approximately 2 to 3% of soil nitrate is lost per day under saturated ...

  8. All Puckered Up: Dicamba Drift Reminders

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-25/all-puckered-dicamba-drift-reminders

    a long half-life in the soil and risk of injury is increased in years with low rainfall. Typical PGR ... chemical makeup and high vapor pressure. Formulation greatly affects the volatility of 2,4-D. Higher ... plant stunting. Soybean tolerance to sublethal rates of these herbicides varies between the different ...

  9. More on Tar Spot: Mid to Late R-Stage Fungicide Application

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-27/more-tar-spot-mid-late-r-stage-fungicide-application

    Most of the corn across the state of Ohio is now between the late-R1 (silking) and late-R3 (milk) ... more likely, a sense of security provided by relatively high grain prices have led to several fields ... additional fields that are now at mid reproductive stages (between late-R2 [kernel blister] and R3 [milk]) of ...

  10. Wheat Harvest Date Reminders

    https://agcrops.osu.edu/newsletter/corn-newsletter/2020-21/wheat-harvest-date-reminders

    bu/acre, and DON level increased by 0.86 ppm. These reductions in yield and test weight and increase in DON ... contamination is generally higher in fields with high levels of wheat scab, it is not uncommon to find above ... excessive rainfall means more time for late-season mold growth, mycotoxin accumulation, test weight ...

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