826 
Journal o f Agricultural Research 
Yol. XXX, No. 9 
Table IV .—The soil-moisture content in acre-inches by foot sections to a depth of 
4 feet, in middled and unmulched soils, at the beginning and at the end of the 
period of extreme summer evaporation during the year of fallow, together with 
moisture losses occurring during the period, Adams Branch Station, Lind, Wash., 
1921 to 1923, inclusive 
Soil section 
1921 
1922 
6-inch mulch 
4-inch mulch 
Unmulched 
Mulched 
U nmulched 
- I « 
<1 j CO 
Xfl 
C/!2 
O 
J 
c 
** 
CO 
a 
<D 
m 
o 
HH 
2 co 
* ! 
3 i a> 
<1 CO 
xn 
m 
O 
O- 
c 
a 
| 
cc 
■A xn 
! 99 
o ® 
Cfj. Hi 
i- 
CD 
Cl, 
<D 
m 
CO 
$ 
First foot_ 
Second foot_ 
Third foot_ 
Fourth foot_ 
1. 63 0. 73 
1.65 1.26 
1.18 1.18 
. 62 .89 
0. 90 
.39 
.00 
“.27 
1. 76 
1.66 
1.32 
.66 
0. 72 
1.21 
1.08 
.80 
1.04 
.45 
. 24 
“. 14 
1.66' 0.49 
1.56 1.03 
1.41 .98 
.61 .72 
1.17 
.53 
.43 
“. 11 
1.70 
1.42 
.69 
.65 
0.81 0.89 
1.28 .14 
.96 j “.27 
.70 “.05 
2. 09 
1. 59 
. 75 
.72 
0. 69 
1. 15 
.95 
.75 
1.40 
.44 
“.20 
“. 03 
Total loss_ 
1.02 
. 12 
.00 
“.27 
1.59 
. 55 
. 10 
“. 14 
2. 02 
.85 
.32 
11 
{ .71 ! 
1.61 
. 21 
.00 
“. 03 
Loss below first foot_ 
Loss from third foot by 
upward movement_. 
Gain in fourth foot_ 
1 
1 
j 
__ .18'_ 
i 
__ .00_ 
_;_ “.05_ 
' 1 
Soil section 
1923 
3-year average 
Mulched 
Unmulchcd 
Mulched 
Unmulched 
July 6 
> 
Sept. 20 
Loss. 
CD 
3 
»-9 
Sept. 20 
Loss 
Spring 
I 
Fall 
Loss 
Spring 
Fall 
Loss 
First foot _ _ _. 
1. 34 0. 89 
0. 45 
1.42 
0. 79 
0. 63 
1.56 
0.81 
0. 75 
1.721 0.66 
1.06 
Second foot_ 
1. 74 1. 39 
.35 
1.51 
1.21 
.30 
1.60 
1.31 
.29 
1.55 1.13 
.42 
Third foot. _ 
1.41 1.33 
.08 
1.29 
1.17 
. 12 
1.99 
1 . 16 
“.07 
1.15 ! 1.03 
. 12 
Fourth foot,.. . . _ ... 
.72 1.11 
“. 39 
1.11 
1 . 21 
“. 10 
.66 
.90 
“. 24 
.81, .89 
“. 08 
Total loss.. _. _ 
.49 
.95 
1.52 
Loss below first foot__ 
.04 
.32 
.02 
.46 
Loss from third foot by 
nnward movement 
.00 
. 02 
. 00 
1 
. 04 
Gain in fourth foot 1 
“.39 
“. 10 
“.24 
“. C8 
1 
° Gain. 
Table V.-^Soil moisture content in acre-inches to a depth of 4 feet of a mulched and 
an unmulched soil at the beginning and at the end of a period of summer precipita¬ 
tion, Adams Branch Station, Lind, Wash., 1923 
Soil section 
Mulched 
Unmulched 
May 31 
July 6 
Gain 
May 31 
: 
July 6 
Gain 
First foot_ 
1.03 
1. 34 
0.31 
1.48 
1.42 
-0. 06 
Second foot_ ... ... . . . _ 
1.41 
1.74 
0.33 j 
1.32 
1.51 
0.19 
Third foot_ 
1.12 
1.41 
0.29 1 
1.15 
1. 29 
0.14 
Fourth foot... _ 
0.59 
0.72 
0. 13 ; 
1.01 
1. 11 
0.10 
Total gain. _ 
_ 
1.06 
i 
0. 37 
flain bolow first font 
1 
0.75 1 
0.43 
Rainfall during interval, in inches . _ 
3. 69 
3. 69 
! I 
_ _ . ... . _ 
..'J . 
