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This article in AJ

  1. Vol. 60 No. 3, p. 263-267
    Received: Oct 27, 1967

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Influence of Row Spacing and Nitrogen Fertilization on Grass Seed Production1

  1. C. L. Canode2



The seed production capabilities of five species of cool-season grasses as influenced by three row spacings and three nitrogen rates were determined for a 5-yr period. The conclusions here are based on the 4- or 5-yr cumulative average seed yields.

Kentucky bluegrass produced more seed in 30- and 60-cm rows. Crested wheatgrass and smooth bromegrass seed production was higher in 60-cm rows, but for smooth bromegrass the difference in seed yield for the 60-cm rows was not significantly higher than those of the 90-cm rows. Orchardgrass produced more seed in the 90-cm rows. Row spacing did not influence the seed yields of red fescue.

Kentucky bluegrass and orchardgrass responded with more seed when fertilized with nitrogen at 90 or 112 kg/ha. Crested wheatgrass produced more seed with 112 kg/ha of nitrogen, but the differences were only significant in the 4-yr average yields. Nitrogen rates over 67 kg/ha did not increase the seed yields of red fescue and smooth bromegrass.

The 90-cm rows resulted in heavier seed than that produced in 60- and 30-cm rows. The 112 kg/ha of nitrogen increased seed weight in red fescue, but decreased seed weight of smooth bromegrass. Nitrogen rates did not influence the weight of crested wheatgrass seed.

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