Water stress detection under high frequency sprinkler irrigation with water deficit index.

Book Title: NA
Year Published: 2003
Month Published: NA
Author: Colaizzi, P. D. ; Barnes, E. M. ; Clarke, T. R. ; Choi,C. Y. ; Waller, P. M. ; Haberland, J. ; Kostrzewski, M.
Book Group Author: NA
Abstract:

A remote sensing package called the agricultural irrigation imaging system (AgIIS) aboard a linear move irrigation system was developed to simultaneously monitor water status, nitrogen status, and canopy density at one-meter spatial resolution. The present study investigated the relationship between water status detected by AgIIS and soil moisture for the 1999 cotton (Gossypium hirsutum, Delta Pine 90b) season in Maricopa, Ariz. Water status was quantified by the water deficit index (WDI), an expansion of the crop water stress index where the influence of soil temperature is accounted for through a linear mixing model of soil and vegetation temperature. The WDI was best correlated to soil moisture through the FAO 56 water stress coefficient Ks model; stability correction of aerodynamic resistance did not improve correlation. The AgIIS did provide field images of the WDI that might aid irrigation scheduling and increase water use efficiency.

Pages: 36 - 43
URL: http:////0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20033023082&site=ehost-live
Volume: 129
Number: 1
Journal: Journal of Irrigation and Drainage Engineering
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 0733-9437
DOI: NA
Keywords:

calculation, crop density, irrigation systems, mathematicalmodels, nitrogen content, plant water relations, remote sensing,satellite imagery, soil temperature, soil water content, statisticalanalysis, water availability, water deficit, water stress, Arizona, USA,Gossypium hirsutum, Gossypium, Malvaceae, Malvales, dicotyledons,angiosperms, Spermatophyta, plants, eukaryotes, Mountain States of USA,Western States of USA, USA, North America, America, Developed Countries,OECD Countries, Southwestern States of USA, statistical methods, UnitedStates of America, Plant Physiology and Biochemistry (FF060), PlantWater Relations (FF062), Soil Physics (JJ300), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management], Mathematics and Statistics (ZZ100)

Source: EBSCO
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