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Yield, Oil Content, and Composition of Sunflower Grown at Multiple Locations in Mississippi

^a Mississippi State Univ., North Mississippi Research and Extension Center, 5421 Highway 145 South, P.O. Box 1690, Verona, MS 38879
^b Sunflower Research Unit, USDA-ARS, 1307 N 18TH ST, Northern Crop Science Lab., Fargo, ND 58105
^c Delta Research and Extension Center, P.O. Box 197, Stoneville, MS 38776
^d Dep. of Plant and Soil Sci., Dorman Hall, Mississippi State Univ., MS 39762
^e Dep. of Engineering, Nova Scotia Agricultural College, 50 Pictou Road, P.O. Box 550, Truro NS B2N 5E3 Canada

View larger version (77K): [in this window] [in a new window]   Fig. 1. Map of Mississippi with indication of the counties. The field experiments with the four sunflower hybrids were conducted at the Mississippi Agriculture and Forestry Experiment Stations (MAFES) research stations in Newton, Starkville, Stoneville, Verona 1, and Verona 2.

View larger version (18K): [in this window] [in a new window]   Fig. 2. Interaction plot of mean yield versus N rate for the four hybrids at the Starkville and Verona 1 locations. Within each location, means sharing the same letter are not significantly different at the 0.01 level of significance.

View larger version (23K): [in this window] [in a new window]   Fig. 3. Interaction plot of mean corrected palmitic (%) vs. N rate for the four hybrids at the Stoneville, Starkville, Verona 1, and Verona 2 locations. Within each location, means sharing the same letter are not significantly different at the 0.01 level of significance.

View larger version (16K): [in this window] [in a new window]   Fig. 4. Interaction plot of mean corrected stearic (%) at the Verona 1 location and linoleic (%) at the Verona 2 location vs. N rate for the four hybrids. Within each location, means sharing the same letter are not significantly different at the 0.01 level of significance.