No significant differences in corn yield were found between organic and chemical sources of nutrients, but a Texas AgriLife Research economist said manure generates higher economic returns than anhydrous ammonia.

Seong Park, AgriLife Research economist, recently had his research published in the Agronomy Journal. The work was from studies he conducted in the Oklahoma Panhandle while at Oklahoma State University (OSU).

The long-term experiment involved the use of pig and beef manure on irrigated corn fields, he said. The testing was conducted in part due to a rapid growth of animal population and density in that region, as well as the northern part of the Texas Panhandle.

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