38 EXPERIMENT STATION RECORD. 



grains every 24 in. was better than planting 3 grains every 36 in. and 4 

 grains every 42 or 48 in. Hows were about 3.1 ft. apart. Grow- 

 ing 1 stalk every 18 in. gave a higher percentage of sound corn, but it 

 reduced the total yield. 



Experiments with seed from different parts of the ear covered a 

 period of 9 years. Each year seed was taken from butts of ears 

 grown from butt grains, and in like manner middles from middles and 

 tips from tips. The results differ immaterially. The average increase 

 for surface cultivation was 6 bu. per acre as compared with deep 

 tillage. A number of experiments were made at other stations, and the 

 results are given in the table. The general tendency of detasseling 

 corn was to reduce the yield, Besults of experiments in detasseling at 

 other stations are tabulated. 



Different methods of harvesting were tried at the station and in 

 various sections of the State. The results seem to indicate that there 

 is but slight difference in the yield of grain between corn cut and 

 shocked, provided it is sufficiently mature at cutting time, and that 

 left standing. They also indicate that varieties not sufficiently mature 

 at cutting time will give the best results when cut and shocked. 



A comparative test of varieties was carried on for 5 years. The 

 author separates the 76 varieties tested into 2 general divisions, 

 namely, yellow and white dent, and under each of these the varieties 

 are classified as large, medium, and small. The Clarage variety was 

 used as a standard of comparison. In the large yellow dent class, 

 Bristol LOO-day corn produced a heavier yield than the Clarage, and 

 Murdock Favorite, a lighter yield. These 2 were the only varieties 

 that matured every year they were grown. Big Buckeye, Chester 

 County Mammoth, Cloud Early, Golden Beauty, Farmer Favorite, 

 Early Mastodon, Pennsylvania Early, Hughes, Waterloo Early, and 

 Early Eclipse produced larger yields than the standard variety, but 

 they did not mature every year. In the medium yellow dent class 

 Early Colossal was equal in productiveness to the Clarage, all the 

 other varieties of this class giving smaller yields. From the large 

 white dent class. Early White Dawn, Hickory King, Hess White, and 

 Maryland White Dent are recommended for southern Ohio, and the 

 Maryland White Dent, Bustler White, and Early White Dent for the 

 northern part of the State as far north as the forty first parallel. White 

 Cap and White Prolific from the medium and small white dent class are 

 not profitable where the Clarage will mature. 



Method of determining comparative yields in variety tests of 

 corn, W. ,1. Fr aser (Illinois 8ta. Bui. /'/, pp. 352-355). — One variety 

 grown on 13 different plats located in a uniform field, 10 by 40 rods in 

 extent, gave yields varying from 45.8 bu. to 100.8 bu., and yields on 

 contiguous plats varied from 05.3 bu. to 80.7 bu. per acre. Variations 

 in yields were greater from small than from large plats. It is con- 

 cluded that differences in the soil interfere with variety tests and a 

 method tor the elimination of errors has been tried. 



