A single−beam spectrophotometer was used to measure the spectral reflectance properties of growing turf. From the data a two−wavelength reflectance ratio R745/R675 was developed for an objective index of turf color. This ratio changed from 3.0 for light green turf color to 6.5 for dark green turf color. (visual rating of 4 to 10, respectively). A two−filter instrument (Ratiospect) was used to measure this index on eight samples of turf of three species. A correlation of 0.984 was obtained between the Ratiospect readings and a visual score of turf color.

A NONDESTRUCTIVE METHOD is presented for the determination of soluble solids in 'Saticoy' cantaloupe (Cucumis melo var. reticulatus Naud.). Near infrared (NIR) spectrophotometry in the wavelength region of 800 to 1000 nm was used to analyze radiation which had interacted with cantaloupe flesh. The feasibility of the method was established using cantaloupe tissue slices, and the method was then extended to intact cantaloupe. The method uses calculated parameters from the spectral data, namely second derivatives determined at two distinct wavelengths, and correlates their ratio with soluble solids. Using tissue slices the correlation coefficient (r) was -0.97 with a standard error of calibration (SEC) of 0.56. The corresponding values for intact fruit were -0.60 and 1.67, respectively.

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