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Nitrates and Prussic Acid are Drought Considerations According to MU Extension Agronomy Specialist


Be cautious when turning livestock into pastures with certain warm season grasses as toxic nitrate and prussic acid can accumulate in drought situations.  “Any plant with the ability to grow quickly can develop buildup of nitrate and prussic acid, but some forages present a bigger threat than others,” said Jill Scheidt, agronomy specialist with University of Missouri Extension.  The sorghum family – including sorghum-Sudan hybrids, forage sorghum, Sudan grass and Johnson grass; and corn – can develop the most buildup of nitrates and prussic acid.  “When there’s a drought, warm-season annuals quit growing but still take up nitrogen from the soil and accumulate nitrates and prussic acid,” Craig Roberts, state forage specialist with MU Extension said. “Once the drought ends those plants start to grow again and look green and lush, but they’ll be full of toxins."  Nitrates and Prussic Acid (PDF) 


Missouri crop performance reports

Finding varieties that best fit a farmer's production goals and challenges is an essential part of profitable grain crop production. MU Variety Testing Program provides the reliable, unbiased, up-to-date information that makes that selection possible.

Each year they test more than 600 corn, grain sorghum, and soybean varieties at 32 locations throughout Missouri. These 32 locations are distributed among four regions: North, Central, Southwest and Southeast. The number of locations within a region depends on the specific test but varies from two to five. Companies enter their varieties into tests at one or more of these regions, but their entries must be placed at all locations within a region.

Headquarters for the MU Variety Testing Program are Bradford Research and Extension Center located in the heart of Missouri six miles east of Columbia. More personnel are located at the Delta Research Center near Portageville and the Hundley-Whaley Center near Albany. The majority of our test locations are farmer fields and we appreciate the cooperation and dedication of our cooperators.

Crop performance reports

Grain sorgham

Hay for sale listings

These listings are a joint venture of the Missouri Department of Agriculture and the University of Missouri.

The listings include sellers names, cities, counties and phone numbers. Sellers can be listed by either region or forage type. Bale type is included: small square, large square, small round, large round, baleage, or other. The number of bales and approximate weight of each bale of hay is included, and if the hay has been analyzed, crude protein, acid detergent fiber, neutral detergent fiber, relative feed value, and percent total digestible nutrients may be included. A final area for notes catches information such as first cutting or specifics such as call times.

Hay market listings

Missouri hay directory


Drought Resources

Missouri Drought Resources

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2018 Cash Rental Rates in Missouri  (G427)

2016 Custom Rates for Farm Services in Missouri  (G302)