v4 FIELD CROPFi 



vidua! ears, but if the t}'pe of kernel is different when they 

 are shelled together they will make an uneven sample of 

 corn which cannot be planted uniformly. Likewise, kernels 

 of corn from the tip and butt of the ear, if shelled with the 

 more uniform kernels in the middle, make an uneven mix- 

 ture which no machine planter can plant uniformly. If 

 a corn grader is at hand through which corn may be run and 

 the small, large, and irregular kernels removed from those 



which are of a uniform 



@0® 



type, it is not so impor- 

 tant that uniform ears l)e 

 selected, or that the tip 

 and butt kernels be re- 

 moved. If such a ma- 



Fi.ure 21.-Tip. middle, and butt kernels. ^lline is UOt at hand, aS 

 Tip and butt kernels should be shelled off io \\\c>. r«Q«fk nn +V»a TViQinv- 

 from the seed ears and discarded, as thev ^^ ^^^^ ^"^^^ "" '^"^ majUl 



Sniformfy ^'''^ "' ^^''^*' '"""'^ ""'" "°* "^"^"'^ ^^^ ^^ farms, it is highly 



important that uniform 

 ears be chosen and that the tip and butt kernels be removed 

 from these ears before the bulk of the corn is shelled for seed. 

 If this is. done, a reasonably uniform sample may be obtained. 



74. Germination. Experiments conducted by a number 

 of experiment stations indicate conclusively that there is a 

 very close relation between the stand of corn and the yield. 

 This being true, it is of great importance that only such seed 

 as is known to be of strong germination be planted. If 100 

 kernels from a uniform sample of corn are taken and each 

 of the 100 kernels grow, producing a strong, vigorous shoot 

 and strong roots, it is reasonable to suppose that the sample 

 is good; but if only 90 out of the 100 kernels grow, the sample 

 is of questionable value, because, if such seed is planted, it 

 means that one acre out of every ten planted will not pro- 

 duce anything. 



75. The Individual Ear Test. Instead of making the 

 test from a bulk sample of corn, as suggested above, the best 



