36 Twenty-seventh Amzuul Report of the
very large number of varieties wé are now able to recom-
mend the best varieties for hay and grain. `
AUttUkz. A continuation of experiments with liming shows
that lime is essential to the successful growing of alfalfa. V
Experiments on different methods of subsoiling show very lit-
tle gain from any of them as compared with ordinary plowing.
Tobacco. Variety tests and fertilizer tests. Fertilizer
tests on the type of soil represented by the Experiment
Station farm tend to show that mineral fertilizers are not ‘
necessary for the growing of this crop.
r Soil Fertility Experiments.
Soil fertility experiment fields are now being conducted
at Burnside, Pulaski County; Lincoln, Laurel County; Berea
and Richmond, Madison County; at Lexington, Fayette —~
County; Lincoln Ridge, Shelby County; Greenville, Muhlen-
berg County; Russellville, Logan County; Lone Oak, Mc-
" Cracken County, and Mayfield, Graves County. A
Each of these fields represents a different type of soil.
On these fields experiments are being conducted to determine
the best fertilizer treatment for increasing and maintaining
fertility, the crops best adapted to the soil, and rotations
adapted to the region.
A brief summary of some of the results obtained will
indicate the value of the work.
The Burnside field is the oldest and has been in operation
six years. The following comparison of untreated soil and
soil treated with acid phosphate shows the progress made in _
reclaiming this unproductive soil.
Untreatenl Treated
Land. Land.
19119f`orn, bush . ......... .. ....._,,...,,... 7.9 17.7
191110:1ts, bus. . . -.. .r.........r . .... U. 9.9 13%.6
1911 Clover Huy, lbs. .....,.._...,._...   .._.. 6138 2,32:4
1912 Vorn, bus. .. H. ..,r_. .   .. _.,,..,... 9.5 43.5
1913 Soy Benn llny, lbs., M,. ._,__,,.,__. M, 62N 2,112
1911 Wlicut. bus. ... ..._.. 2. ..... W .. .... .. .- 2.5 18.1
Value of Above Crops ..,_..._.,... . ..__,r.,_., $23.52 $55,09
Cost of Fertilizers .r._.. . . . ........._.....,.,_ r .._.. $9.60
Nut Value of Increase ..... - ..,,... _   ..,.._. . __,,. $51.97