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Web URL(s): | http://a-c-s.confex.com/crops/2008am/webprogram/Paper45082.html Last checked: 02/20/2009 |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Dai, Jing;
Schlossberg, Maxim J. |
Author Affiliation: | Crop and Soil Sciences, The Pennsylvania State University, University Park, Pennsylvania |
Title: | No more paper bags? Turfgrass clipping yield correlates well with normalized differential vegetative index |
Section: | Graduate student poster competition: II. Diseases, genetics, physiology and technology (posters) Other records with the "Graduate student poster competition: II. Diseases, genetics, physiology and technology (posters)" Section
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Meeting Info.: | Houston, Texas: October 5-9, 2008 |
Source: | 2008 Joint Annual Meeting: [Abstracts][GSA/SSSA/ASA/CSSA/GCAGS/HGS]. 2008, p. 45082. |
Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America; Boulder, CO: Geological Society of America; Austin, TX: Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM; Houston, TX: Houston Geological Society |
# of Pages: | 1 |
Keywords: | TIC Keywords: Clipping weight; Growth analysis; Growth factors; Density; Agrostis stolonifera; Golf greens; Dry weight
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Abstract/Contents: | "Clipping yield provides a useful assessment of turfgrass growth and vigor, but is an operationally cumbersome and labor-intensive procedure. Multispectral reflectance indices, such as the normalized differential vegetative index (NDVI), have been proven to be rapid, indirect measures of turfgrass canopy densities. Field studies were conducted in 2006 and 2007 to investigate correlation of clipping yield and NDVI for 'Penn A-4' and 'Penn G-2' creeping bentgrass (Agrostis stolonifera L.) plots, managed as golf course putting greens. Plots were maintained at a 3.2-mm mowing height (clippings not returned) and fertilized with N from 14.6 to 43.9 kg ha-1 mo-1. Clipping yield dry mass (kg ha-1 d-1) was collected regularly over the course of the studies. Duplicate measures of NDVI (660- and 850-nm) were recorded using a turf chlorophyll meter (TCM 500, Spectrum Technologies, Inc., Plainfield, IL), 3-4 d before clippings were harvested. Significant correlation of clipping yield dry mass and NDVI was detected among the 462 pairs of collected data. Several regression models, with varying predictive potential, were developed to estimate clipping yields of creeping bentgrass putting greens from NDVI. Results indicate indirect estimation of turfgrass clipping yield by NDVI may serve as a potential alternative to direct measurement." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Dai, J., and M. J. Schlossberg. 2008. No more paper bags? Turfgrass clipping yield correlates well with normalized differential vegetative index. Joint Ann. Meet. p. 45082. |
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