The reference ET (ETref) concept was introduced by irrigation engineers and researchers to avoid the confusions that existed in the definition of potential ET. By adopting a reference crop (grass or alfalfa), it became easier and more practical to select consistent crop coefficients and to make reliable actual crop ET estimates in new areas. Introduction of the reference ET concept also helped to enhance the transferability of the crop coefficients from one location to another. Two reference crops have been used to represent the reference ET: grass and alfalfa.
Was this article helpful?
This book will surely change your life due to the fact that after reading this book and following through with the steps that are laid out for you in a clear and concise form you will be earning as much as several thousand extra dollars a month, as you can see by the cover of the book we will be discussing how you can make cash for what is considered trash by many people, these are items that have value to many people that can be sold and help people who need these items most.