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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) ...
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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 ...
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Phosphorus (P) Nutrient Use in Ohio
https://ohioline.osu.edu/factsheet/anr-0143
percent of Ohio counties had decreasing trends in mean soil test P (STP) levels between 1993 and 2015. ... a large degree for given soil test P (STP) values and crop production levels. In instances with the same ... reduced median soil test P (STP) levels across most Ohio counties from 1995 to 2015 supports this finding ...
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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 ...
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Ohio Phosphorus (P) Use by Crop Reporting District
https://ohioline.osu.edu/factsheet/anr-0144
the acreage in the Scioto River basin. Soil test P is one factor that can mitigate the amount of ... Table 2 would result in lower soil test phosphorus (STP) values over time. Evidence that this is ... levels between 1993 and 2015 (LaBarge, 2023). Future trends in STP are expected to continue to decline ...
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Graduate Exit Seminar- Kaustubh Kumar
https://senr.osu.edu/events/graduate-exit-seminar-kaustubh-kumar
model of the Great Lakes region’s FEWS under alternative future scenarios. The key research question ...
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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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Fall Color Change in Ohio
https://ohioline.osu.edu/factsheet/anr-0145
typically peak between mid- to late October. This fact sheet explains the processes that cause fall ... marcescent. The leaves remain on the trees due to the abscission layer not completely forming between the leaf ... the production of carotenoid pigments within the leaves. Soil moisture also plays a part in fall ...
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Professor Lal featured in Columbus Monthly
https://senr.osu.edu/news/professor-lal-featured-columbus-monthly
discover Dr. Lal's views on soil health as a vehicle to solve food insecurity and climate change here ... >> Soils faculty in the news ...
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Graduate Exit Seminar- Laura Mason
https://senr.osu.edu/events/graduate-exit-seminar-laura-mason
population, cropping and livestock grazing has greatly intensified, resulting in degraded soils. Local and ... biological systems are needed to maintain crop yields and soil health. A solution is the Optimized ... ha-1) and incorporates coppiced biomass to soils. Research has shown OSS shifts soil microbial ...