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  1. Do I Really Need to Wait for the Fly-Free Date? Wheat Planting Date and Other Management Considerations for Fall 2022

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-30/do-i-really-need-wait-fly-free-date-wheat-planting-date-and-other

    than corn or soybean, and soil test levels should be maintained between 30-50 ppm (Mehlich-3 P) for ... optimum production (Table 1). Do not add any phosphorus if soil test levels are higher than 50 ppm. Table ... Wheat, and Alfalfa. Soil potassium should be maintained at levels of 100-130 and 120-170 ppm (Mehlich-3 ...

  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. Harvesting and Handling Ear Rot-Affected Corn

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-34/harvesting-and-handling-ear-rot-affected-corn

    Consequently, ethanol plants may reject GER-affect grain with high levels of vomitoxin. Slow grain dry-down, ... being lost. When vomitoxin levels are unacceptably high, close your reclean all the way and even block ... levels around 26 ppm in samples of the screenings coming from our perforated screens, while the grain ...

  5. Feeding Frosted Forages

    https://agcrops.osu.edu/newsletter/corn-newsletter/2022-34/feeding-frosted-forages

    prussic acid in forages. Fertility can affect poisoning risk. Plants growing under high nitrogen levels or ... reduce the risk of animals selectively grazing leaves that can contain high levels of prussic acid. Never ... below in decreasing order of toxicity risk: Grain sorghum = high to very high toxic potential ...

  6. 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 ...

  7. Converting between Mehlich-3, Bray P, and Ammonium Acetate Soil Test Values

    https://ohioline.osu.edu/factsheet/anr-75

    Bray P. When only soil test values in the agronomic range were considered (less than 50 ppm Bray P), ... relationships between Mehlich-3, Bray P, and Ammonium Acetate soil test extractants in the Tri-State Region. ... 3–1170 ppm, and Mehlich-3 K values ranged from 25–899 ppm. We examined relationships with all soil test ...

  8. Variety Selection

    https://agcrops.osu.edu/variety-selection

    a high partial resistance rating to address that problem. The selection of medium or small seed when ... varieties is tested for yield over a range of environments, their rank order commonly changes, which ... and lodging are problems, then select varieties that are medium to short in height with good ...

  9. 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 ...

  10. Grapevine Nutrient Management: Petiole Sampling and Analysis

    https://ohioline.osu.edu/factsheet/hyg-1438

    availability. However, there is a poor relationship between soil and plant nutrient levels. While a soil may be ... adequate levels of another nutrient while the soil test indicates a deficiency. This poor relationship may ... Manganese (Mn) 25–1,000 ppm 3 31–150 ppm Iron (Fe) 30–100 ppm 31–50 ppm Copper (Cu) 5–15 ppm 5–15 ppm Boron ...

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