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Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/59/1/AJ0590010044 Last checked: 12/09/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Walker, William M.;
Pesek, John |
Author Affiliation: | Walker: Research Associate; Pesek: Professor, Soils |
Title: | Yield of Kentucky bluegrass (Poa pratensis) as a function of its percentage of nitrogen, phosphorus, and potassium |
Source: | Agronomy Journal. Vol. 59, No. 1, January/February 1967, p. 44-47. |
Publishing Information: | Washington: American Society of Agronomy |
# of Pages: | 4 |
Keywords: | TIC Keywords: Poa pratensis; Nitrogen; Phosphorus; Potassium; Fertilizers; Chemical analysis; Chemical composition; Clippings; Tissue testing; Yield response; Variance
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Abstract/Contents: | "Kentucky bluegrass clippings were obtained from experimental plots containing a control plus treatments conforming to a 5 x 5 x 5 central composite design with N, P, and K fertilizer variables over a period of 2 years. A sample of each clipping from each plot each year was saved for chemical analysis. The samples were then ground, mixed, subsampled, and analyzed for their percentage of N, P, and K. A regression analysis was computed, and a prediction equation with bluegrass yield as a quadratic function of its average percent N, percent P, and percent K was determined. The resulting prediction equation had an R2 of 0.7419 and was used to estimate "critical percentages" for N, P, and K in Kentucky bluegrass. The technique developed would be expected to be applicable to other crop and soil conditions." |
Language: | English |
References: | 13 |
See Also: | Other items relating to: Potassium |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Walker, W. M., and J. Pesek. 1967. Yield of Kentucky bluegrass (Poa pratensis) as a function of its percentage of nitrogen, phosphorus, and potassium. Agron. J. 59(1):p. 44-47. |
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| Web URL(s): https://dl.sciencesocieties.org/publications/aj/pdfs/59/1/AJ0590010044 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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