USE OF SCORE CARD 4H 



V. SHELLING PERCENTAGE. 



1. Size and Density of Cob. A large cob means low shelling 

 percentage. A cob of woody texture is always heavy. 



2. Depth of Kernel. The deeper the kernel, the greater the 

 , proportion of corn to cob. 



3. Filling of Butts and Tips. Other things being equal, ears 

 with well filled butts and carrying their size well out on 

 the tip, will shell the highest percentage of corn to cob. 

 The depth of the kernel should also be maintained over 

 the tip. 



4. Space at Cob. Space at the cob is a very definite indica- 

 tion of a low proportion of corn to cob. Ears apparently 

 sound on the surface may have faults which should be 

 carefully looked for. 



5. Furrows Between Rows. A wide open furrow between 

 the rows indicates a low shelling percentage and lack of 

 breeding. Closeness at the crown or lack of furrow usu- 

 ally indicates space at the cob. There should be sufficient 

 furrow to permit the corn to dry out readily. 



THE USE OF THE SCORE CARD. In judging single ears 

 in class work, or at short courses, the sample usually consists of 

 ten ears. After filling out the proper blank at the head of the 

 score card and arranging the ten ears in order with two kernels 

 placed germ side up at the tip of each ear, the student is 

 ready to score the sample. It will be found most convenient 

 and practical to score each ear under a respective point 

 before going to the next point ; that is, mark each ear under the point 

 "shape and size" of ear, before the point of "constitution" is consid- 

 ered. By so doing, a comparison is kept constantly in mind. The 

 scorer should look over the sample and choose the ear which he thinks 

 is nearest to perfection and set down an estimate for it, then rate the 

 remainder in comparison. If a similar method is followed for each 

 individual point on the score card, the work of scoring will be much 

 more correct as well as more rapid. In scoring, the cut should not be 

 put down, but the amount allowed entered in the first column under 

 the number of the ear. In place of using fractions, decimals should 

 be placed in the second column. A cut of .25 per cent is the least. In 

 summing up the results, the rating of the ears by the score card should 

 correspond with the way one would place them without scoring. That 

 is, your judgment should correspond with the score card. In scoring 

 a sample of corn the amount that an ear is cut in a given point is not 



