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ARS Home Office of Communications Images Photos Apr08





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Image Number D1103-1 The crosses visible in this infrared image and in photo D1102-1 are for coregistration of the images from the two cameras. Coregistration allows identification of individual leaves. The circles are placed around individual leaves, which were later cut for determination of leaf water potential, a key indicator of plant water stress. In this infrared image, the reddish areas are at 44 ̊C, the leaves within the circles are at 33 ̊C, and the blue rectangle (white in the color photograph) is a wet reference surface at 26 ̊C. Scientists determined the relationships among leaf water potential, leaf temperature determined by the infrared camera, and multispectral measurements, which are useful in automating irrigation applications for efficient water use. The plot received the normal full irrigation amount.  Photo by Brice Ruthardt.  640 pixels wide: (d1103-1.jpg)   Please visit our Image Gallery


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