Oklahoma State University



Relative Yield in Low pH Soils:   Inter. J Agronomy article.

Locations: Lahoma, Perkins, Haskell Est 2009 Finalized 2010
This trial is designed to tell us how much yield we will lose, as a percentage of the total possible, if we grow Sunflowers in acid soils.
Treatments include a range of pH's:
7.0, 6.0, 5.5, 5.0, 4.5, and 4.0
Graduate Student Assigned: Katy Brookman Butchee

Brief Summary:  Sunflower looks to be one of the most Aluminium tolerant crops evaluated within our pH trials.  Over the two years and 3 locations the Agronomic option range of for sunflower was 5.0 and above.  However yield losses were recorded in soil pH levels of 5.1-5.2.  The study concluded sunflower is a good option as a rotational crop with winter wheat in acidic soil conditions where lime application is not feasible. 

Sunflower Emergence in Acid Soils

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