. Productive agriculture . number of the square upon which thekernels are laid. A dry cloth is placed over the seeds. Thenabout one-half to one inch of sand is thrown over the cloth, andanother cloth is placed over the sand. In about six to eight daysthe test is ready, if the conditions for germination have beenright. These conditions are: proper temperature (about 70°to 80° Fahr.), proper supply of moisture, and free every kernel germinates, the ear should be discarded. In the rag doll test, a white musUn cloth is marked into 2-inch squares, and six kernels of corn are laid on e
. Productive agriculture . number of the square upon which thekernels are laid. A dry cloth is placed over the seeds. Thenabout one-half to one inch of sand is thrown over the cloth, andanother cloth is placed over the sand. In about six to eight daysthe test is ready, if the conditions for germination have beenright. These conditions are: proper temperature (about 70°to 80° Fahr.), proper supply of moisture, and free every kernel germinates, the ear should be discarded. In the rag doll test, a white musUn cloth is marked into 2-inch squares, and six kernels of corn are laid on each square. 38 PRODUCTIVE AGRICULTURE The square and ear from which the kernels are taken are labeledcorrespondingly. The cloth is rolled up not too tightly and a stringis tied around it. The lower end of the rag doll is then set in abucket containing about two inches of water. Keep the bucketcovered. If conditions are favorable for germination, the test willbe ready to read in about eight days. (See Exercises 9 and 10.). Fig. 18. — Germination test of different ears of corn. Discard ears i, 2, 3, 4, 5, 7, 9, 11,12, 15, 20. Selection by test is an important factor in increasing com yield. Productive Variations of Com. — Plants and animals varyin their 3delding or reproductive capacities. The reproductivecapacity of corn has been increased by cultivation. The cornof the Indians produced ears with ten or twelve rows of kernelsor less, and with 20 or 30 kernels in a row. One stalk and oneear were usually produced in a hill. This would mean cornproduction at the rate of about 200 to 300 kernels per hill, about CORN 39 7 or 8 bushels an acre. We have increased the yield to 30, 40,or 50 bushels an acre. But it is possible to increase our yieldsstill more by selecting corn that is proliiic. We find sometimesthree or four plants growing in the same hill, under the sameconditions. One stalk may have a nubbin, and another stalkin the same hill may have two good-sized ears. There ma
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