Agronomy Guide For Field Crops – Corn – Fertility – Nitrogen

Nitrogen (N) Corn responds well to nitrogen, so adequate availability of nitrogen is critical to profitable corn production. Excess nitrogen adds unnecessary expenses and increases the risk of nitrate movement to ground water, poorer quality of surface water and production of greenhouse gases through nitrous oxide emissions. Insufficient nitrogen leads to nitrogen deficiency. Nitrogen deficiency […]

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Herbicides, Fungicides, Nitrogen and Sulphur – Prioritizing trips across your winter wheat fields this spring

Joanna Follings, Mike Cowbrough, Peter Sikkema, Dave Hooker and Peter Johnson Mother nature has finally awarded us with some sun and warmer temperatures which will hopefully get the remaining winter wheat stands off to the races.  However, as we get out into the fields some are questioning what to prioritize and what practices to avoid […]

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2015 Ontario Soil N Survey

Co-author Ken Janovicek, University of Guelph. Background The OMAFRA field crop unit in collaboration with farm cooperators, agribusiness and SGS-AgriFood Labs conducted the annual survey of soil nitrate nitrogen levels across the province from June 3rd to June 5th, sampling over 130 fields. The samples were collected after heavy rainfall events during the weekend of May 30-31, where […]

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Verifying a Pre-Sidedress Soil Nitrate Threshold Test for Evaluating Nitrogen Top-Up Needs

Purpose: Pre-sidedress soil nitrate test (PSNT) provide a means of estimating soil nitrogen supply, and can aid producers in fine-tuning their nitrogen application rates for corn. One drawback of current soil nitrate tests is that they are only calibrated for situations where all of the nitrogen being measured has come from soil mineralization, that is […]

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