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Determination of the Weight of Water in a Soil or Subsoil Mass in Which the Moisture Content Increases with Distance from a Plant or Group of Plants 1
Author(s) -
Jackson M. L.,
Weldon M. D.
Publication year - 1939
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1939.00021962003100020004x
Subject(s) - subsoil , water content , agricultural experiment station , citation , soil water , mathematics , library science , horticulture , agronomy , environmental science , agriculture , engineering , geography , computer science , soil science , biology , archaeology , geotechnical engineering
putation of weight of water is relatively simple. A more involved process is required for the computation, however, when the water content varies with distance from a plant. Such distribution is.encountered in subsoil moisture studies in orchards (4, 5)3 and possibly in lysimeter and other moisture studies. The purpose of this paper is to present formulas suitable for calculating the weight of water in soil and substrata in which the moisture content is not uniform but varies systematically.4 The formulas are applicable to fields in which plants or hills are regularly spaced, and several possible spacings are considered. Ordinary arithmetical operations suffice in applying the formulas, although higher mathematics ~ is required in their derivations. Attempt has been made to explain the logic of the derivations in such a way as to facilitate their modification and re-arrangement o fit the individual needs of the user. Suggestions are made where further development may be desirable.