
20 REPORT OF THE DIRECTOR OF THE 
per cent of the total value of the wheat crop of the United States, 
and 52.4 per cent of the value of the total corn crop. 
The average acreage yield of these ten States during the thirteen 
years, 1862 to 1874 inclusive, was of wheat 13.95 bushels, and of 
corn 33.24 bushels; during the twelve years, 1875 to 1886 inclusive, 
the average acreage yield of wheat was 12.63 bushels, and of corn 
30.84 bushels. 
It appears, therefore, that these States had fallen off nearly ten 
PAN AL (ee LA ABR OW ch arene 
Srna US RUeN 
per cent in their average yield of wheat, and over seven per cent — 
in their average yield of corn, a condition of affairs which may 
justify a certain degree of anxiety lest these fertile fields of the 
west, which give us our excess for export, are, through unwise 
agricultural methods, being exhausted of their fertility to an extent 
which shall before long render the future production of these crops 
unprofitable to the farmer. 
BULLETINS. 
here has been a very general desire upon the part of the farm- 
ers of the State and other friends of the Station that the publica- 
tion of occasional bulletins should be resumed, in order that the 
work of the Station should be made known more widely and at 
more frequent intervals than was possible by means of the annual 
report. 
In accordance with this desire there have been issued by the 
Station six bulletins, in which the following subjects have been dis- 
cussed or the results of the work of the Station set forth: 
Bulletin No 10—August, 1888. 
. Influence of fertilizers on the chemical composition of plants. 
. Analysis of feeding stuffs. 
. Feeding and digestion experiments. 
GC) bO Re 
Bulletin No. 11—September, 1888. 
. Experiments in cultivation. 
. Experiments in root growth. 
. Experiments with fertilizers. 
. Experiments with insecticides. 
. Experiments with fungicides. 
. Experiments with the potato. 
. Experiments with sorghum. 
“IO oR De 

