. Field crop production; a text-book for elementary courses in schools and brief courses in colleges. Agriculture. WHEAT 139 paragraph on the improvement of corn. More careful experimenters will desire to measure off accurately a fraction of an acre for each variety. The test is most valuable when it has been carried on for several years on the same farm, since the influence of sea- sonal conditions may be more accurately de- termined. 127. The head-row test.—When the best variety has been se- lected, still further opportunity for im- provement is to be found in the selection of the highest yi
. Field crop production; a text-book for elementary courses in schools and brief courses in colleges. Agriculture. WHEAT 139 paragraph on the improvement of corn. More careful experimenters will desire to measure off accurately a fraction of an acre for each variety. The test is most valuable when it has been carried on for several years on the same farm, since the influence of sea- sonal conditions may be more accurately de- termined. 127. The head-row test.—When the best variety has been se- lected, still further opportunity for im- provement is to be found in the selection of the highest yield- ing plants in this va- riety. Individual plants like ears of corn vary markedly in their ability to yield. If, therefore, the high- yielding plants can be found and used for per- petuation, great oppor- tunities for increasing the yield are possible. The method of making this selection is known as the head- row test. This test consists in going into the field at harvest time and selecting under normal conditions of growth a number of the most promising individuals. From 25 to 1000 heads, representing as many plants, may. Fig. 47. — Head-row test at the Ohio Sta- tion showing variation in erectness of 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 Livingston, George. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
