’
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    ` . 14 Thirtieth Annual Report of the .
4   A beans, wheat and clover. A cowpea crop was turned under,
3 2 , preceding the corn crop of 1913, and manure was used, pre-
    ¤· ceding the corn crop of 1916 at the rate of 6 tons per acre,
I · f 1 both on the plots treated with fertilizers and those untreated.
. ..     These fields have been under cultivation since 1912, and all
- l the crops grown are included in the averages, except the corn
. ’ , crop of 1917, the figures for which are not yet available.
{ 1   » On these fields limestone was used at the rate of two tons
f ——   . per acre, once in four years, acid phosphate at the rate of 800
i   Q lbs. per acre, once in four years, and raw ground rock phos-
  V   phate at the rate of 1,600 lbs. per acre, once in four years. The
  g V   materials were applied on the ground prepared for the corn `
  E   , crop. The rock phosphate was plowed under. Acid phosphate
-. rl . - . »
3 Q  and limestone were applied on the plowed ground and were
5 %,  ` disked in.
1 * ·
1 ll
i     Table IV. Yields Per Acre. Western Experiment Fields.
{ `   1 GREENVILLE ·
  . "   nl  
I Y. F} Soy Bean Clover Value of Increase
‘   Y , Treat- Corn Hay Wheat Hay for Rotation, Less
6       , ment* Bus. Lbs. Bus. Lbs. Cost of Ferts.
`T _ 5   ` O ............ 24.9 1827 3.5 304 ............
  Y _,i_ .;j;,,;l L ............ 27.8 2334 4.1 852 $5,82
      AP ........ 31.6 2394 5.3 1375 9.58
Q-?_;j_'j4_,i*   RP ........ 31.5 2664 5.5 1518 12.20
  .,_.·  gl LAP ...... 41.5 3363 9.2 2063 26.86 _
l ‘.-, .jQ‘j,f,f,l-{ . LRP ...... 36.7 2920 7.3 1760 17.37
*`*- `·‘l‘   RUSSELLVILLE
.  F —‘*‘;`~T—·——? ·—~m;m*
*   0 ............ 34.3 2245 12.6 1792 .._.________
  ;,     L ............ 38.2 3144 10.0 2965 $9,36
    AP ........ 37.9 2813 15.8 2703 8.01
LET `.__   RP ........ 39.3 2765 16.8 3100 12.02
  " LAP ...... 44.1 2945 20.2 3697 20.20
    _ LRP ...... 42.2 2839 17.4 3602 14.96
  ~ *O—No Treatment; AP—Acid Phosphate; RP—Rock Phosphate;
-F‘·_`T¤jY::}“Qil L--Limestone.
F"`   -.?;`}-.;}.2
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