EFFECT OF BORAX ON GROWTH AND YIELD OF CROPS. 19 
At the other stations the fertilizer-borax mixtures were injurious 
and when applied in the drill caused lower yields than when applied 
with a fertilizer distributer. The illustrations shown in Plate VII, 
Figures 1 and 2, and Plate VIII, Figures 1 and 2, will give some 
idea of the effect of borax in fertilizer upon the yield of potatoes on 
two soil types. 
What is brought out here as well as in other parts of this bulletin is 
convincing proof that borax caused injury. [ven were the rainfall 
heavy in one section, thereby mitigating the injury, it does not follow 
that the same weather conditions would prevail elsewhere or in another 
season, and since it has been definitely brought out herein that borax 
is quite apt to be harmful, it should be practically eliminated from 
fertilizer salts. Fortunately, this is already fully recognized. The fact 
is further brought out from thé field tests on several soil types that 
practically borax-free potash salts give good results. 
FURTHER RESULTS WITH POTATOES AND CORN. 
Results obtained with potatoes and corn at New Brunswick, N. 
J. (2), and with potatoes at Presque Isle, Me.,’ are again referred to 
here, with certain tabular presentations of yields and rainfall data, 
in order that the results may be assembled in their entirety, the 
details having been presented elsewhere. 
The plan of the experiments in New Jersey and in Maine was 
similar to that at Arlington, Va., particularly as applies to the quan- 
tity of borax used. In New Jersey, fertilizer at the rate of 1,500 
pounds per acre was applied to potatoes and at the rate of 400 pounds 
to corn; and in Maine, at the rate of 2,000 pounds to potatoes. The 
results are presented in Tables 9, 10, and 12. 
TABLE 9.—LZfect of various quantities of borax on potatoes in plats on Sassafras loam at 
New Brunswick, N. J., wn 1920. 
{Fertilizer application, 1,500 pounds per acre; variety grown, Irish Cobbler.] 
Yield per plat (pounds). 
Borax per acre. | Sec. 1.— Fertilizer applied | co, 9 Fertilizer applied | Sec. 3.—Fertilizer applied 
lw. soe. nahese Pre- | in drill at time of planting. |broadcast at timeof planting. 
| Primes. Seconds Total. | Primes. Seconds. | Total. | Primes. |Seconds.| Total. 
} | 
| | | 
None (check 1).....; 78. 25 7. 50 85. 75 75. 50 5. 50 81.00 58. 25 TO" = BGO D 
Popp. eS. 2 ; 64.20 9.05 69.95 | 56.30 6. 85 63.15 41, 40 5. 00 46. 40 
2 pounds=22 52202. 75. 55 4.65 80. 20 72. 50 9. 00 81.50 58. 05 5. 80 | 63. 85 
ZapOENGS soos. | 75. 65 6.65 82.30 | 65.60] 9.10 74. 70 60. 15 5.75 | 65. 90 
None (check 2)..... 79. 75 a20 87. 45 62.95 | 10.35 73. 30 65. 70 4,45 70. 15 
#poands? (Li 525.. 88.35 6. 40 94.75 69.55 | . 7.60 77.15 66. 35 4,95 71.30 
DEPOUINOS: 222-2 os 85. 20 6. 00 91. 20 ido 4,65 81. 80 62. 20 8. 00 70. 20 
Tinounds. 2 2052 2-- | 88. 60 5. 90 94. 50 64.55 | 6.45 71.00 60. 80 5. 10 65. 90 
None (check 3).-....| 86.90 5. 75 92.65 67.75 8. 60 76.35 65. 80 4.10 69. 90 
Pe pounds. <= >=. 85. 70 3.75 89. 45 68.75 | 6.90 75.65 79. 00 3. 00 82. 00 
So pounds G26 2. js 76. 95 3. 00 79. 95 55. 00 3. 85 08. 85 74. 00 3. 59 77.55 
PMLVOUTGS - 5. | 67.95 3. 55 71. 50 25.35 | 1.40 26. 75 45. 70 2.00 | 47.70 
None (check 4). .... | 65.15 7.65 72. 80 60.35 | 6.00 66. 35 66. 85 6. 55 73. 40 
100 pounds.........) 43.75 3.00 46.75 2.00] 1.00 3. 00 1,25 . 50 1.75 
200 pounds. ........ | 22. 50 1.25 23.75 | None. . 125 .125 | None. | None. None. 
400 pounds. ........| 4.00 - 50 4.50 | None.  None.; None.| None. | None. None. 
* Brown B. E. Effect of borax in fertilizer on the growth and yield of potatoes. U.S. Dept. Agr. 
Bul. 998, 8 p., 1 fig., 4 pl. 1922. 
