A Field Technique to Study Root Growth in Peanut
- C. S. Kvien ,
- J. Schroeder and
- P. A. Banks
Traditional techniques for the field study of root growth usually require extensive monitoring devices and a large labor force. We have developed a simple field technique to study root growth using the carotene-inhibiting herbicide, fluridone [1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenyl]-4(l/H)-pyridinone]. Underground bands (0- to 15-, 20- to 35-, or 40- to 55-cm vertical depth, 5 cm in width) of fluridone were sprayed into location using fan nozzles mounted on a subsoil tine. The experiment was conducted near Tifton, GA, on a Tifton loamy sand (fine-loamy, siliceous, thermic Plinthic Paleudults). Peanut (Arachis hypogaea L.) seed were hand planted in 3- m-long rows at a 23° angle to the band. The horizontal distance from row to fluridone band varied from 0 to 1.2 m. A root growth profile was generated by measuring, three times a week, the horizontal distance from the band to the farthest plant showing leaf bleaching. This technique provided a simple and accurate method for determining root growth patterns in peanut.
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