. Classification of American wheat varieties. Wheat; Wheat. Fig. 7.—Beak widths: a, Narrow ; 6, midwide; o, wide. (Natural size and enlarged 3 diameters.). Fig. 8.—Beak shapes: a, Obtuse; t, acute; cv, acuminate. (Natural size and enlarged 3 diameters.) Acute beaks come to a point at the apex. Acuminate beaks are nar- rowly and very sharply pointed. All awned spikes have acuminate beaks. These shapes are shown in Figure 8. LENGTH OF THE BEAK. Beak lengths are quite variable, especially in the awned varieties, and are considerably influenced by environment. In general, condi- tions which increa
. Classification of American wheat varieties. Wheat; Wheat. Fig. 7.—Beak widths: a, Narrow ; 6, midwide; o, wide. (Natural size and enlarged 3 diameters.). Fig. 8.—Beak shapes: a, Obtuse; t, acute; cv, acuminate. (Natural size and enlarged 3 diameters.) Acute beaks come to a point at the apex. Acuminate beaks are nar- rowly and very sharply pointed. All awned spikes have acuminate beaks. These shapes are shown in Figure 8. LENGTH OF THE BEAK. Beak lengths are quite variable, especially in the awned varieties, and are considerably influenced by environment. In general, condi- tions which increase or decrease the length of the beak affect nearly all varieties to a similar degree. In the awnless wheats the differences in length are not great, but in many va- rieties they are quite distinct. The length of the beak is measured from the shoulder of the glume upward. On most awned wheats the length increases from the base of the spike to its apex. The range of differ- ence varies greatly with the variety. For this reason no definite measurements are used in describing the lengths, but instead the average maximum and minimum lengths are recorded in millimeters. None of the awnless varieties here de-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clark, J. Allen (Jacob Allen), b. 1888; Ball, Carleton Roy, 1873-1958; Martin, John H. (John Holmes), 1893-. Washington : Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectwheat, bookyear1922
