CHEMICAL COMPOSITION OF FEEDING STUFFS 55 
Yield of Ingredients in Corn Plants, in Grams* 
1000 plants contained 
orem ee 
Date weg Ty Sugar, | 
ae be Ash | one Fiber cee Gade Amides 
June 25 sax 5 0.5 43 142 90 210 16 41 
July Deus 21 2.1 161 566 438 847 63 186 
Side 39 4.1 342 1020 933 1681 94 385 
16 78 8.3 674 1898 1896 3585 187 677 
23 161 18.8 1190 3249 4581 9301 380 | 1136 
30...) 276 32.8 1978 4972 8194] 16884 679 | 1727 
August 6...| 468 55.0 3069 7215 | 14420} 29266 851 | 2780 
13% 0% 565 67.4 3576 8192 | 17892 | 36746 865 | 2735 
20 591 82.6 3991 8848 | 21164] 47357 974 | 3369 
28 es ae 108.7 5131 11369 | 27394 | 63232 |. 1143 | 4970 
September 3... dea 121.2 5215 12218 | 28311] 73247 | 1729 | 4722 
10... 611 119.4 5120 11554 | 27023 | 73473 1906' | 3245 
* 1000 grams equal 2.2 pounds avoirdupois. 
Similar results were obtained at Geneva (N. Y.), Maine, and 
other stations in studies of the development of the corn plant from 
tasselling to maturity.° 
Chemical Changes in the Corn Crop toward Maturity 
Yield per acre Tasselled Silked Milk Glazed Ripe 
Gross weight, tons....... 9.0 12.9 16.3 16.1 14.2 
Dry matter, pounds...... 1619 3078 4643 7202 7918 
Ash, pounds............ 139 201 232 303 364 
Crude protein, pounds... 240 437 479 644 678 
Fiber, pounds........... 514 873 1262 1756 1734 
Nitrogen-free extract, 
pounds..............- 654 1399 2441 4240 4828 
Fat, pounds............. 72 168 229 260 314 
The data given in the table show how rapidly the yields of feed 
materials increase with the advancing age of the corn plant and also 
how the increase during the latter stages of growth comes mainly 
on the nitrogen-free extract (largely starch). Between tasselling 
and maturity the corn plant will increase an average of about 200 
per cent in dry matter and toward 300 per cent in carbohydrate 
content, according to the results of experiments conducted at five 
different stations. The largest amounts of feed materials in the corn 
crop are not obtained until the corn is well ripened; when the 
plants have reached their total growth in height they contain only 
one-third to one-half of the weight of dry matter which they will 
gain if left to mature. 
5Geneva, N. Y., Report, 1899; Maine Report, 1895. 
