254
H. WALTER AND E. STADELMANN
-
-10
E
o
-15
-20
XII
I
- 1933
- 1934
II
III
IV
V
\
VI
VII
/
r
VIII
- 2 5
Month
Fig. 22. Osmotic potential for leaves of Triticum vulgäre (winter wheat, var.
Trubilo) in 1933 (normal precipitation) and 1934 (dry year). Plot was fertilized
(after Stieglitz, 1936, pp. 161 and 165).
TABLE IX
OSMOTIC POTENTIAL ψ 8 (IN ATM) AND YIELD [MEASURED IN (I)
i/ha
OR (II) hl/hu] OF CROP PLANTS IN THE CANADIAN PRAIRIE
0
Medicago sativa (Alfalfa)
first cutting fresh
weight
Medicago sativa (Alfalfa)
second cutting fresh
weight
Triticum vulgäre
var. "Thatcher" yield
Triticum vulgäre
var. "Lemhi" yield
Hordeum sativum
var. "Montcalm"
yield
Avena sativa
var. "Eagle" yield
Beta vulgaris
ssp. vulgaris var.
altissima
(sugar beet) yield
Solarium tuberosum
(potato) yield
Φ*
(I)
Ψ*
(I)
Ψ*
(Π)
ts
(ID
Ψ.
(ID
Ψ*
(ID
Ψ*
(I)
Ψ*
(ID
- 1 0 . 6
24.4
- 1 0 . 3
21.8
- 1 0 . 5
33.3
- 1 0 . 4
43.0
- 1 0 . 3
43.4
- 9 . 4
85.5
- 1 2 . 1
35.6
- 8 . 6
326
- 1 1 . 5
19.2
- 1 0 . 4
20.6
- 1 0 . 7
32.7
- 1 1 . 0
40.8
- 1 0 . 7
41.5
- 1 0 . 1
70.0
- 1 2 . 6
33.6
- 8 . 7
248
- 1 1 . 9
21.8
- 1 0 . 9
17.0
- 1 1 . 7
31.4
- 1 1 . 1
30.0
- 1 1 . 8
36.2
- 1 0 . 4
60.7
- 1 3 . 2
28.4
- 9 . 4
264
- 1 4 . 7
16.6
- 1 3 . 1
13.9
- 1 1 . 9
28.1
- 1 1 . 3
28.0
- 1 2 . 0
36.6
- 1 0 . 6
64.3
- 1 3 . 6
30.0
- 9 . 4
214
- 1 7 . 2
11.7
- 1 4 . 1
12.8
- 1 2 . 3
25.1
- 1 1 . 4
32.2
- 1 2 . 6
32.3
- 1 1 . 0
59.7
- 1 3 . 6
28.7
- 9 . 4
182
- 1 9 . 9
8.1
- 3 0 . 3
0.7
- 1 2 . 8
24.4
- 2 1 . 2
28.0
- 1 4 . 6
27.6
- 1 4 . 4
56.5
- 2 2 . 4
11.9
- 1 0 . 5
62.9
a After Bauman (1957, p. 72ff).