North Central Canola Research Program

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Yield Response to Nitrogen Fertilizer by Application Timing in Hybrid and Open Pollinated Canola Varieties

Yield Response to Nitrogen Fertilizer by Application Timing in Hybrid and Open Pollinated Canola Varieties
John Lukach, North Dakota State University - $13,077

Many producers have expressed concern over the high cost of cash inputs for producing canola compared to other crops. Analysis of the values in the North Dakota projected 2003 Crop Budget Bulletins supports this opinion. Budget values indicate the cost of seed, herbicide, insecticide and fertilizer by crop, when averaged across six North Dakota regions “excluding” the Red River Valley for canola, oil sunflower, soybean and re-crop HRS wheat is $58.53, $35.55, $40.60 and $32.70 respectively. Fungicides were not included for any crop. This indicates a North Dakota canola producer must plan f or about $20/a higher expenses for seed, herbicide, insecticide and fertilizer than for other crops. The higher input costs affect profitability in the traditional canola regions of northeast North Dakota and northwest Minnesota, which have high yield potential, but likely reduce the acres of canola production in newer areas which often have lower yield potential. About 19 percent of North Dakota canola acres in 2000, 21 percent in 2001, were in the traditional canola area, Cavalier and Towner counties.

Objectives:
1. Evaluate efficiency of split applied nitrogen at the canola five leaf stage compared to pre-plant incorporated.
2. Re-evaluate the nitrogen response curve for canola and adjust to fit current varieties which may require lower nitrogen fertilization than currently recommended.
3. Compare lower cost seed of open pollinated canola varieties to hybrid varieties in lower yielding environments that may not support the expense of hybrid seed.

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