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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 ...
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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 ...
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ANR-841-2E: Tobacco Sucker Control
https://ohioline.osu.edu/factsheet/anr-0841-2e
that have a longer duration between topping and harvesting. However, individual burley varieties may ... long. When To Use Before a systemic sucker-control chemical is used, plants should be topped when 50% or ... in the past discouraged purchases of burley tobacco by foreign buyers. Experiment station field tests ...
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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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Ohio Commercial Pesticide Applicator Requirements: Who Needs a License and the Steps To Take
https://ohioline.osu.edu/factsheet/anr-0140
garden center products or minimum-risk products, such as cedar oil, garlic oil, or corn gluten meal, are ... licensing and testing. Follow the steps below to become a licensed commercial applicator: Complete and mail ... — Agricultural Weed Control Category 2d — Seed Treatment Category 2e — Tobacco Sucker Control Category 2f — Soil ...
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Ohio Private Pesticide Applicator License Requirements: Who Needs a License and the Steps to Take
https://ohioline.osu.edu/factsheet/anr-0141
grown under an impervious surface large enough to permit worker entry, including high tunnels and ... restricted-use fumigants to soil, grain storage, greenhouse, or any other confined areas. Stored Grain Student ... applicators also have the option of retaking the core and category tests instead of obtaining recertification ...
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Gibberella Ear Rot and Mycotoxins in Corn: Sampling, Testing, and Storage
https://ohioline.osu.edu/factsheet/AC-52
screening steps. Semi-quantitative tests estimate vomitoxin at or above certain levels (>5 ppm) or within ... (DON), also called vomitoxin. As a result, high levels of Gibberella ear rot severity and moldy grain are ... usually accompanied by high levels of vomitoxin. Mycotoxins are harmful to both humans and animals. ...
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HCS Alumni Spotlight: Cameron Stephens
https://hcs.osu.edu/news/alumni-cameron-stephens
Between sophomore and junior year, I did an internship at a golf course. Between junior and senior year, ...
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Abnormal Ears in Corn—When and Why Do They Develop?
https://ohioline.osu.edu/factsheet/anr-0139
reducing productivity and spurring research about the underlying causes. Distinct differences exist between ... fields averaged 26% of abnormal ears, with abnormal ear production ranging between 12 and 49% (that is 12 ... conditions driven by unfavorable growing conditions (environment), susceptible hybrids (genetics), high or ...
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Ammonia Emission from Animal Feeding Operations and Its Impacts
https://ohioline.osu.edu/factsheet/AEX-723.1
50 ppm, increased levels of keratoconjuctivitis 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 ...