BULLETIN 
U. S. DEPARTMENT 0T AGRICULTURE. 
Table 1. — Yield of potatoes in oorax experiment at Presque Isle, Me., in 1920. 
Quantity of borax applied per acre. 
Yield per acre (pounds). 
Section l.o 
(Control 1) 21, 760 
1 pound 23. 200 
2 pounds. ..:■ 22. 880 
3 pounds I 23. 440 
(Control 2^ 20. 560 
4 pounds J 20, 480 
5 pounds 19. 720 
10 pounds 17 600 
(Control 3) ; 20, 880 
20 pounds J 12, 080 
30 pounds. 
50 pounds. 
(Control 4) . 
100 pounds.. 
200 pounds.. 
400 pounds.. 
(Controls), 
7, 120 
5,280 
20. 320 
560 
240 
80 
18. 560 
[ 
Section 2. & \ Section 3. e 
19. 600 
20. 960 
21. 760 
18. 320 
22. 560 
19. 840 
18, 160 
13, 680 
21. 040 
9.040 
3. 120 
1,600 
17, 680 
320 
80 
d40 
18, 960 
20, 240 
19. 120 
19, 440 
18, 240 
19, 040 
19. 680 
19, 760 
15, 840 
18. 800 
12, 000 
4,880 
3,400 
19, 300 
640 
160 
80 
14, 240 
a Fertilizer applied in the furrow about one week before planting. 
6 Fertilizer applied in the furrow planting. 
c Fertilizer applied broadcast at planting, 
d All culls. 
In section 3 the general trend of the results is similar to that in sec- 
tions 1 and 2, the first sign of injury occurring, however, with the 10- 
pound application. In this section the method of applying the fer- 
tilizer-borax mixtures apparently depressed the yield of the last 
contral as the yield dropped off considerably. In this connection, 
in view of the fact that single rows were employed in the borax 
experiments, it would seem that broadcasting a fertilizer-borax mix- 
ture containing such a large quantity of borax might easily tend to 
influence the yield of the adjacent control row. 
RAINFALL RECORD. 
The daily rainfall record for the months of June, July, and August 
is given in Table 2. 
The rainfall, subsequent to planting on June 5. was well distrib- 
uted during the remainder of that month, at least until June 29, 
on which date 1.09 inches fell, followed by 1.01 inches on June 30. 
It would seem that the rain, which fell between June 5 and June 29 — 
a somewhat critical period in the early life of the potato plant — was 
sufficient to keep the soil in good condition without much chance of 
any great leaching of the borax to lower soil zones. 
