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Bromegrass Fertilization
A nine-year study at the Fargo Agricultural Experiment Station compared the yield of crested wheatgrass and smooth bromegrass with and without N fertilization. During the first three production years, crested wheatgrass yielded 1.9 tons per acre without N fertilization, 1.2 tons during the next three years and only 0.7 tons during the last three year period. Forage yield averaged 1.8 tons during the last three years when 100 pounds of N was applied annually.
Smooth bromegrass yields followed a similar yield decline. During the last three years of the study, yields averaged 0.8 tons per acre without N fertilization and 2.3 tons per acre with 100 pounds of N applied annually.
Late fall is an excellent time to fertilize grass stands, especially on medium to heavy textured soils. If conditions do not permit, early spring is also an excellent time. If soils are sandy, an early spring application is desirable to prevent potential leaching losses in late winter and early spring.
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