This article was posted to FieldCropNews.com by Joel Bagg (retired OMAFRA Forage Specialist) on September 9, 2012. It was updated on May 31, 2024 by Christine O’Reilly to fix broken links to external resources. Farmers exposed to silo gas (nitrogen dioxide, NO2) are at risk of severe respiratory distress, permanent damage to lungs, and even sudden death. It is difficult to predict when silo gas will be produced, so always take precautions following harvest. Weather conditions and agronomic practices affect the amount of nitrates in plant material, which set the stage for the production of NO2 in the silo. For example, a dry period during the growing season followed by abundant rainfall will encourage a corn crop to take up high levels of…
All posts tagged silo gas
Caution! Silo gas and nitrate poisoning
Rain events across the province have interrupted a dry spring. While the water is welcome, the 5-7 days after a rain that ends a severe dry period increases the risk of nitrates in forage crops! Nitrates are of concern because they can increase silo gas production and cause nitrate poisoning in livestock. Silo Gas Silo gas (nitrogen dioxide, N2O) is produced almost immediately after filling a silo. It has a bleach-like odour and may be visible as a reddish-brown haze. However, it is not always visible. Nitrogen dioxide is heavier than air, therefore it tends to be located just above the silage surface and on the ground around the silo. It may flow down silo chutes and into feed rooms. Tower silos are…
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