[U.S.] Soil and Water Conservation Research Division_

[U.S.] Soil Conservation Service

Soil moisture measurements..

5, 24, 31

18, 20, 23, 36, 44, 49, 60

12, 27

! ! ! ! ! ! ! !

12

12

12

12, 24

12

12

12

12

27

50

50

43, 50

43

19

50

19

50