ASABE Technical Library - Abstract

Click on “Download PDF” for the PDF version or on the title for the HTML version.
If you are not an ASABE member or if your employer has not arranged for access to the full-text, view access and subscription options

CIGR Handbook of Agricultural Engineering, Volume I Land and Water Engineering, Chapter 5 Irrigation and Drainage, Part 5.1 Crop Water Requirements

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  CIGR Handbook of Agricultural Engineering, Volume I Land and Water Engineering, Chapter 5 Irrigation and Drainage, Part 5.1 Crop Water Requirements, p  .(doi:10.13031/2013.36302)
Authors:   L. S. Pereira, R. G. Allen
Keywords:   Section headings: 5.1.1 Main Concepts, 5.1.2 Evapotranspiration: The Penman-Monteith Equation, 5.1.3 Description of the Reference Evapotranspiration, 5.1.4 Calculation of the Reference Evapotranspiration…

First paragraph: The utilization of water for crop production has been recognized as essential since agricultural practices began to be developed. Irrigation was practiced in old civilizations, mainly in the Orient and the Mediterranean basin. A few centuries ago, agricultural production changed, mainly because new crops began to be cultivated and agricultural production became progressively oriented toward the market. Farmers soon recognized that yields could be increased when water was applied in larger amounts. The concept of crop water requirements (CWR) probably did not exist when irrigation was practiced for subsistence purposes but surely developed as evidence began to accumulate on the dependency of yields on the water applications. These concepts became important when large engineering works began to be built to provide for water supply to newly irrigated areas and it became necessary to estimate the water volumes to be supplied.

(Download PDF)    (Export to EndNotes)