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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/76/4/AJ0760040569
Last checked: 12/08/2016
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| Publication Type:
| Refereed |
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| Author(s): | Michaelson, G. J.;
Loynachan, T. E.;
Wooding, F. J. |
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| Author Affiliation: | Michaelson: Graduate Research Assistant; Loynachan: Associate Professor, Derpartment of Agronomy, Iowa State University, Ames, Iowa; Wooding: Professor, Agricultural Experiment Station, University of Alaska, Fairbanks, Alaska |
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| Title: | Establishment, dry matter yield, and crude protein of fertilized smooth bromegrass on a cleared Alaskan soil |
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| Source: | Agronomy Journal. Vol. 76, No. 4, July/August 1984, p. 569-572. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Dry weight; Establishment; Proteins; Bromus inermis; Fertilization program; Fertilization rates; NPK ratio; Soil fertility; Nitrogen fertilization; Phosphorus; Potassium; Growth factors; Yield response
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| Abstract/Contents: | "A study was established to evaluate the fertilizer responses of smooth bromegrass (Bromus inermis Leyss. cv. Polar) during the first 3 years of growth on a newly cleared soil (Typic Cryochrept) in interior Alaska. The fertilization rates in the N4 by P4 by K4 complete factorial experiment were N at 0, 45, 90, and 135 kg/ha, and P and K each at 0, 34, 68, and 102 kg/ha. Yield responses to N were minimal without application of the first 34 kg/ha increment of P, and a significant N by P interaction occurred each of the 3 years of the study. During establishment (1979), the first increment of N (45 kg/ha) increased growth over sixfold above the level of the nonfertilized control. Growth was improved throughout the 0 to 102 kg/ha range of P, with over an eightfold increase in total production. In 1980 and 1981, total dry matter yields from the two cuttings increased with added N from 0.26 and 0.21 Mg/ha at the 0 N rate to 2.6 and 2.0 Mg/ha with 45 kg/ha N, respectively. Comparable yields at 90 and 135 kg/ha N were 3.8 and 4.3 Mg/ha in 1980 and 3.4 and 4.7 Mg/ha in 1981. Multiple regression equations were developed to predict bromegrass yield and N uptake for the 1980 and 1981 seasons. Relatively high coefficients of determination were obtained for dry matter yield (R2 = 0.845 for 1980 and 0.857 for 1981) and for N uptake (R2 = 0.861 for 1980 and 0.872 for 1981). Linear responses to N suggest that rates above 135 kg/ha N may provide even higher yields and protein contents." |
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| Language: | English |
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| References: | 12 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Michaelson, G. J., T. E. Loynachan, and F. J. Wooding. 1984. Establishment, dry matter yield, and crude protein of fertilized smooth bromegrass on a cleared Alaskan soil. Agron. J. 76(4):p. 569-572. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/76/4/AJ0760040569
Last checked: 12/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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