Kentucky Agricultural Experiment Station. 15
LONE OAK
Soy Bean Clover Value of Increase `
Treat- Corn Hay Wheat Hay for Rotation, Less
ment* Bus. Lbs. Bus. Lbs. Cost of Ferts.
O ......l..... 31.5 2755 11.4 763 .,_.,_,,.__,
L ............ 29.9 2480 7.7 715 —$9.67T
AP ....... 31.6 2750 11.7 1080 -4.16T
RP ......... 33.5 2745 12.0 1065 -2.741 _
LAP ...... 35.9 3853 19.1 3025 21.32
LRP ...... 37.9 3900 16.8 3060 20.82
MAYFIELD
/
0 ............ 23.6 2344 6.8 240 ............ I
L ............ 26.1 2675 8.0 1135 $7.19
AP ........ 24.2 2365 8.8 500 —2.32T
RP ........ 26.5 2330 8.8 1025 2.12
LAP ...... 34.6 3578 15.2 3070 30.54
LRP ...... 36.1 3795 16.9 2213 29.37
*O—No Treatment; AP--Acid Phosphate; RP-Rock Phosphate; _
.L—Limestone. TLoss.
Neither limestone alone nor phosphate alone has given as
encouraging returns as might have been hoped for. The out- ,
standing feature of the results is the large increases due to
` limestone a11d phosphates, used together, being much greater
than the sum of the i11ereases produced by the materials used
singly.
An unexpected result on the Lone Oak a11d Mayfield fields
is the small returns from phosphate used alone. This is prob-
ably due to the fact that the soils of these fields are badly
worn tllld nitrogen is very deficient. A good reason for believ-
ing this to be the explanation is found in the results obtained
on the clover-tobaeco—wl1eat rotation 011 the Mayfield field.
Some very badly worn ground was prepared well Ptlltl seeded to
red clover in August. One plot was treated with acid phos-