About Us | Help Videos | Contact Us | Subscriptions

Members of ASA, CSSA, and SSSA: Due to system upgrades, your subscriptions in the digital library will be unavailable from May 15th to May 22nd. We apologize for any inconvenience this may cause, and thank you for your patience. If you have any questions, please call our membership department at 608-273-8080.


Institutional Subscribers: Institutional subscription access will not be interrupted for existing subscribers who have access via IP authentication, though new subscriptions or changes will not be available during the upgrade period. For questions, please email us at: queries@dl.sciencesocieties.org or call Danielle Lynch: 608-268-4976.



This article in SSSAJ

  1. Vol. 25 No. 2, p. 138-141
    Received: May 31, 1960
    Accepted: June 28, 1960

Request Permissions


Lysimetric Measurements of Evapotranspiration Rates in the Eastern United States1

  1. C. H. M. van Bavel2



A review is presented of various methods to determine the evapotranspiration rate under field conditions. It is shown that, at the present time, the data which have been collected by a suitable lysimetric method are the only ones that exist in quantity and that, at the same time, can be considered as reliable.

The conditions which must be met by a lysimeter installation for the accurate and representative measurement of the evapotranspiration rate are reviewed. It is shown that both the exposure as well as the moisture conditions in the soil of the lysimeter must be representative of those in the surrounding area if realistic values are to be obtained.

Selected data from four locations in the Eastern United States are presented and compared. It is shown that data for grass cover under a variety of geographic and climatological conditions do not vary greatly from one another. Such dependable comparisons as are available between different crops show that the differences between corn, wheat, and meadow crops are small though not insignificant. The need for additional and adequate lysimetric measurements of evapotranspiration rates in the eastern half of the United States is discussed as well as the necessity for making pertinent meteorological measurements to aid in the generalization of the data.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America