Web URL(s): http://www.tandfonline.com/doi/abs/10.1080/01904169609365168 http://www.tandfonline.com/doi/pdf/10.1080/01904169609365168?needAccess=true Publication Type:
i
Report Author(s): Kantety, R. V. ;
Van Santen, Edzard ;
Woods, F. M. ;
Wood, C. W. Author Affiliation: Department of Agronomy and Soils and Department of Horticulture; Auburn University, Alabama, AL Title: Chlorophyll meter predicts nitrogen status of tall fescue Source: Journal of Plant Nutrition . Vol. 19, No. 6, 1996, p. 881-899.# of Pages: 19 Publishing Information: New York: Marcel Dekker, Inc. Keywords: TIC Keywords: Nitrogen ; Nitrogen fertilization ; Nutritional requirements ; Endophytes ; Measurement ; Chlorophyll ; Festuca arundinacea ; Dry weight ; Fertilization rates ; Acremonium coenophialum ; Genotypes ; Soil types ; Lolium multiflorum ; Seasonal variation ; Models Abstract/Contents: "The nitrogen (N) status of a crop can be used to predict yield and supplemental N fertilizer requirements, and rapid techniques for evaluating the N status of crops are needed. A study was conducted to determine the feasibility of using a hand held chlorophyll meter (SPAD 502, Minolta Co. Ltd., Japan) to monitor N status of tall fescue (Festuca arundinacea Schreb.). Four diverse tall fescue genotypes were grown at three locations in Alabama and fertilized at four N-rates from 0 to 336 kg haā»Ā¹. A similar experiment was conducted in the greenhouse using soil from the same field sites. Chlorophyll meter readings (SPAD) were taken, and extractable chlorophyll content, tissue N concentration and dry matter yield were determined at harvest. SPAD, extractable chlorophyll content, tissue N concentration, and dry matter yield increased quadratically (0.670.95. An additional independent variable, the square root of the inverse of SPAD, lowered the residual mean square by 11 and 16%, respectively, for tissue-N and chlorophyll concentrations, but did not increase the RĀ². This would be preferred for predicitive purposes. Tissue N concentrations at higher N-rates were sufficient for maximum yield which occurred at 290 and 248 kg N haā»Ā¹ for greenhouse and field, respectively, but were lower than previously reported sufficiency values. The chlorophyll meter is an easy and efficient method of detecting tall fescue N status." Language: English References: 19 Note: Graphs Geographic Terms: Alabama ASA/CSSA/SSSA Citation (Crop Science -Like - may be incomplete ): J. Plant Nutr. 19(6):p. 881-899.Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=71154 If there are problems with this record, send us feedback about record 71154 . Choices for finding the above item : Web URL(s): http://www.tandfonline.com/doi/abs/10.1080/01904169609365168 http://www.tandfonline.com/doi/pdf/10.1080/01904169609365168?needAccess=true QK 867 .J67 Find from within TIC: Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)
