. Maize; its history, cultivation, handling, and uses, with special reference to South Africa; a text-book for farmers, students of agriculture, and teachers of nature study. Corn; Corn. BOTANICAL CHARACTERS 119 average of average of average of (r) Circumference of ear at 2 inches from tip: maximum inches; minimum inches ; average of ten inches. (5) Weight of ear: maximum oz. ; minimum 0/ ten oz. (r) Weight of cob: maximum oz. ; minimum oz ten oz. (//) Percentage of grain: maximum ; minimum ten (v) Circumference of cob at 2 inches from butt: inches. (tr) Ratio of circumference of cob to that o
. Maize; its history, cultivation, handling, and uses, with special reference to South Africa; a text-book for farmers, students of agriculture, and teachers of nature study. Corn; Corn. BOTANICAL CHARACTERS 119 average of average of average of (r) Circumference of ear at 2 inches from tip: maximum inches; minimum inches ; average of ten inches. (5) Weight of ear: maximum oz. ; minimum 0/ ten oz. (r) Weight of cob: maximum oz. ; minimum oz ten oz. (//) Percentage of grain: maximum ; minimum ten (v) Circumference of cob at 2 inches from butt: inches. (tr) Ratio of circumference of cob to that of ear; 90. The Grain.—The grain of maize and other grasses is often spoken of as a seed, but it is in reality more than a seed, it is a whole fruit. It is a peculiar form of fruit, for the peri- carp or outer covering of the fruit is completely united with the seed-coat. This special form of fruit is called a caryopsis. The caryopsis of the maize plant comprises the following parts :—the hull, which is the combined peri- carp and seed-coat; lying immediately under the hull is a layer of cells known as the aleurone layer (Figs. 15A and 6oj. The hull and aleurone layer together enclose the main mass of the grain. This consists of two distinct parts, the endosperm and the embryo (Fig. 1 5J). The grains are arranged with the embryo side towards the tip of the FlG^ Rection through hull ear ; when the ear hangs of maize grain. />, pericarp ; f, testa or Clown, the embryo is then seed coat' "• P«=™r«m; a, aleurone * laver; j, endosperm, (i'rom Passmore and on the under side of the vVebber.) CHAP. The grain may be firm on the cob or movable. Movable grains may, sometimes, be due to the ear being not fully mature when gathered, or to lack of adequate moisture at the time of ripening off. The grain may be set on at right angles to the surface of the cob, or it may slant towards the Please note that these images are extracted from scanned page ima
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectcorn, bookyear1914
