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Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/60/5/AJ0600050560 Last checked: 12/09/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | McGinnies, William J. |
Author Affiliation: | Range Scientist, Crops Research Division, Agricultural Research Service, United States Department of Agriculture, Fort Collins, Colorado |
Title: | Effects of nitrogen fertilizer on an old stand of crested wheatgrass |
Source: | Agronomy Journal. Vol. 60, No. 5, September/October 1968, p. 560-562. |
Publishing Information: | Washington: American Society of Agronomy |
# of Pages: | 3 |
Related Web URL: | https://dl.sciencesocieties.org/publications/aj/abstracts/60/5/AJ0600050560 Last checked: 12/09/2016 Access conditions: Item is within a limited-access website Notes: Abstract only |
Keywords: | TIC Keywords: Application rates; Nitrogen fertilization; Urea; Agropyron desertorum; Yield response
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Abstract/Contents: | "Nitrogen fertilizer, in the form of urea, was applied to a 16-year-old stand of crested wheatgrass [Agropyron desertorum (Fisch. ex Link) Schult.] at rates of 0, 22, 45, 67, 90, 112 kg N/ha/yr. Annual and biennial applications were made over a 6-year period starting in 1962. Average herbage yield was increased by the addition of N at all rates. The greatest increase in herbage yield per kg N applied was at the 22-kg/ha rate; the increase in yield per kg N applied declined as the rate N increased. Total average herbage yield was highest at the 67-, 90-, 112-kg rates. Annual fertilizer applications produced significally higher average yields than biennial applications. The unfertilized plots declined in productivity during the period covered by the study, but as little as 22 kg N/ha/yr appeared to prevent the stand deterioration. A one-time only application of 0, 22, 45, 67, 90, 112, 135, 180, 225, 449 kg N/ha was applied in 1962. The 22- and 45-kg/ha rates increased herbage yield in the first year, and 67- to 225-kg/ha rates increased yields through 1965. The 449 kg/ha rate increased yield through 1966, but had no significant effect in 1967. The magnitude of the response to N and the relative efficiency per kilogram applied depended upon moisture availability." |
Language: | English |
References: | 8 |
Note: | Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): McGinnies, W. J. 1968. Effects of nitrogen fertilizer on an old stand of crested wheatgrass. Agron. J. 60(5):p. 560-562. |
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| Web URL(s): https://dl.sciencesocieties.org/publications/aj/pdfs/60/5/AJ0600050560 Last checked: 12/09/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: S 22 .A45 |
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