EXPERIMENT STATION BULLETINS. 



46 L 



Total yield of dry matter from two square rods, 18S9. 



Date. 



Ang 10 

 Aug. IS. 

 Aug 22 



Ang. 28 

 Sunt. 3 

 8e .t. 9 

 Sept. 14 



Green matter. 



On tw i 



.• q r<is. 



L,bs. 



240 

 260 

 273 

 240 

 2.2 

 203 

 184 



Per acre 

 Lbs 



19.2(0 

 20.MJO 

 21, 8UJ 

 19,2l<0 

 l-i,96u 

 16.4UO 

 14,7.0 



Dry matter. 



Dry matter in silage. 



Condition of corn. 



In full tassel. 



urn in silk. 

 Kt-rue.s fully formed. 

 K. rums iu milk 

 Kernels still in milk. 

 Kerut-ls past mi k. 

 ■ oru glazed. 



One of the earlier experiments on the question of the stage of growth 

 at which the corn plant contains the greatest amount of nutrients was 

 reported in Bulletin 4, of the Cornell University. 



"BEST PERIOD FOR CUTTING." 



"For this test, from a field of Sibley's Pride of the North corn planted 

 in hills, fair average hills were selected at different times, cut and 

 weighed, and the samples sent to the laboratory for analysis. At the 

 same time a number of hills sufficient to give a fair average of the yields 

 per acre were also cut and weighed. In this way both the yield per 

 acre and the quality were ascertained. The corn was planted on May 

 7th, the first cutting was made on July 24, at which time the plants 

 were just coming into bloom. The second cutting was made on August 8, 

 when the corn was hardly in roasting ear condition. The third cutting 

 was made September 3, at which time the majority of the ears were out 

 of the milk, and in one week's time the adjoining corn was ready to cut 

 and shock. Below are given the results: 



Table IV. 



There was an increase in this experiment of the yield of protein per 

 acre of 250.6 to 585.8, and of carbo-hvdrates from 1543.6 to 6166.7. The 

 author of the bulletin estimates that the real feeding value of the corn 

 "increased 166 per cent after it had tasseled and 80 per cent after it had 

 nearly reached the roasting ear stage." (Cornell Bulletin 4, page 52.) 



In the report of the Pennsylvania Experiment Station for 1888, page 

 30, it is shown that the increase in dry matter as the corn approaches 

 maturity is very great and continues until the corn is fully ripe, that 

 between the period of tasseling and complete ripening there was an aver- 

 age gain of dry matter of 155 per cent. 



