maize: collateral reading 2)^ 



constitute a cut in points. Measure the circumference at one-third the distance 

 from the butt to the tip of the ear. 



10. (a) Furrows Between Rows, 5 Points. — The furrows between the 

 rows of grains should be of sufficient size to permit the maize to dry out readily, 

 but not so large as to lose In proportion of grain to cob. 



(b) Space Between Tips of Grains at Cob, 5 Points. — This is objection- 

 able, as it indicates immaturity, weak constitution and poor feeding value. 



11. Proportion of Grain to Cob, 10 Points. — The proportion of grain is 

 determined by weight. Depth of grains, size of cob, maturity furrows and space at 

 cob, all affect the proportion. In determining the proportion of grain to cob, weigh 

 and shell every alternate ear in the exhibit. "Weigh the grain and subtract from 

 weight of ears, giving weight of grain ; diWde the weight of grain bv the total 

 weight of ears, which will give the p2r cent of grain. Per cent of grain should be 

 from S6 to Sj. For each p:r cent short of standard, a cut of one and one-half 

 points should be made. 



27S' Determination of Commercial Grades of ^L\IZE. — Give each 

 student two to four pornds of maize cf two or more unlike samples and have him 

 determine the proper grade. (367) 



(a) Per cent of water: grind a sufficient amount of maize into a coarse meal and 



determine per cent of water in thirty grams by drying to constant weight at 

 102° C. 



(b) Color: determine psrcentaga of color in 500 grains by count. 



(c) Damaged grains: determine p3rcentage of rotten, moldy or other-wise un- 



sound grains in 500 grains by count. 



(d) Broken grains and dirt : determine on the basis of weights the percentage of all 



broken grains, meal, dirt, chaff and other foreign material in two or more pounds. 



376. Collateral Reading. 



Natural Distribution of Roots in Field Soils. By F. H. King. Ninth Ann. Rpt 

 of the Wis. Agr. Expt. Sta. (1S92), pp. 1 12-120. 



Varieties of Com. By E. L. Sturte\-ant. U. S. Dept. of Agr., Office of Expt 

 Sta. Bui. 57. 



Manual of Com Judging. By A. D. Shamel. New York: Orange Judd Com- 

 pany (1903). 



Xenia, or the Immediate Effect of Pollen in Maize. By H. J. Webber. U. S 

 Dept. of Agr,, Div. Veg. Phys. and Path. Bui. 22 (1900). 



Methods of Com Breeding. By C. G. Hopkins. 111. Agr. Expt. Sta. Bui. S2 (1902). 



Selecting and Preparing Seed Corn. By P. G. Holden. Iowa Agr. Expt. Sta. Bui. 



77 (i9<34)- 

 The Maintenance of Fertilit)'. By Charles E. Thome. Ohio Agr. Expt. Sta. Bui 



no (1S99). 

 Ten Years of Experiments in Corn Culture. By R. J. Redding. Ga. Agr. Expt 



Sta. Bui. 46 (1S99), pp. 73-75. 

 Modem Silage Methods. The Silver Manufacturing Co., Salem, Ohio. 

 Maize. Origin of Cultivated Plants. By Alphonse De Candoile. New York 



D. Appleton & Co. (1902), pp. 3S7-397. 



