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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/2005jou923.pdf
Last checked: 09/29/2008
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| Publication Type:
| Refereed |
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| Author(s): | Kruse, Jason K.;
Christians, Nick E.;
Chaplin, Michael H. |
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| Author Affiliation: | Department of Horticulture, Iowa State University, Ames, Iowa |
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| Title: | Remote sensing of phosphorus deficiencies in Agrostis stolonifera |
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| Section: | Soil biology & chemistry & plant nutrition
Other records with the "Soil biology & chemistry & plant nutrition" Section
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| Meeting Info.: | Llandudno, Wales, UK: July 10-15 2005 |
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| Source: | International Turfgrass Society Research Journal. Vol. 10, No. Part 2, 2005, p. 923-928. |
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| Publishing Information: | Aberystywth, Ceredigion, UK: International Turfgrass Society |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Biomass; Remote sensing; Phosphorus; Nutrient deficiency; Agrostis stolonifera; Soil fertility; Sand-based root zones; Canopy reflectance; Calcareous sands; Golf greens
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| Abstract/Contents: | "Managing the fertility of turfgrasses growing in sand-based rootzones can offer many challenges due to the low nutrient-holding capacity. Calcareous sands, which are widely used in construction of putting greens, can increase the problems with nutrient deficiencies, particularly phosphorus (P). The objectives were to investigate the response of creeping bentgrass (Agrostis stolonifera L.) exhibiting visual P deficiencies to applied P, and to determine the relationship between P deficiencies and canopy reflectance within the 400 to 1050 nm. The experiment was a randomized complete block design with three replications established on a creeping bentgrass putting green built to USGA specifications with calcareous sand. The treatments consisted of four P rates (0, 0.5, 1.0, and 1.5 g m-2) applied as foliar applications. Phosphorus deficiency symptoms decreased and biomass production increased at P rates above 1.0g m-2 with a single application, while no increase in soil-P was observed. Reflectance measurements were taken in increments from 400 to 1050 nm and correlated with plant tissue P concentration, chlorophyll content, plant biomass and visual quality. Stepwise regression identified a model utilizing relectance in the blue, yellow, orange, and red regions of the spectrum that explained 73% of the variability in plant tissue P concentration for all sampling dates in 2002 and 2003. Few correlations were found between vegetative indices such as the normalized difference vegetation index (NDVI) and plant response. Results indicate that P deficiencies of creeping bentgrass can be detected through the use of remote sensing. Phosphorus deficiencies were corrected with a single foliar application of P at rates above 1.5 g m-2." |
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| Language: | English |
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| References: | 27 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kruse, J. K., N. E. Christians, and M. H. Chaplin. 2005. Remote sensing of phosphorus deficiencies in Agrostis stolonifera. Int. Turfgrass Soc. Res. J. 10(Part 2):p. 923-928. |
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| Web URL(s):
https://archive.lib.msu.edu/tic/its/articles/2005jou923.pdf
Last checked: 09/29/2008
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MSU catalog number: SB 433 .I52 v. 10 |
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