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REF-ET: REFERENCE EVAPOTRANSPIRATION CALCULATION SOFTWARE for FAO and ASCE Standardized Equations Version 3.1.15 for Windows for Windows XP, Vista and Windows 7 Copyright 1999, 2000, 2001, 2003, 2008,.

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How to fill out the REF-ET - University of Idaho Extension - Extension Uidaho online

The REF-ET form is an essential tool for calculating reference evapotranspiration using standardized equations. This guide provides step-by-step instructions on how to accurately complete this online form, ensuring you gather the necessary data effectively.

Follow the steps to complete your REF-ET online form.

  1. Press the 'Get Form' button to access the REF-ET form online.
  2. Begin by filling in the data collection parameters such as maximum and minimum air temperatures, relative humidity, and solar radiation. Make sure to input accurate values to ensure reliable calculations.
  3. Provide site-specific information like station elevation, latitude, and longitude. This data is crucial for accurate extraterrestrial radiation calculations.
  4. Specify the type of vegetation being referenced, such as grass or alfalfa, and its corresponding height. This influences the calculation of evapotranspiration.
  5. Review the options for output units and select the appropriate equations for evapotranspiration type. Ensure that you check the boxes for any intermediate files you wish to generate.
  6. Before final submission, double-check all entered data for accuracy and completeness.
  7. Once completed, save the form, and select options to download, print, or share your results with the necessary stakeholders.

Get started by filling out the REF-ET form online today!

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Hence, radiation, air temperature, air humidity and wind terms should be considered when assessing transpiration. The soil water content and the ability of the soil to conduct water to the roots also determine the transpiration rate, as do water logging and soil water salinity.

Relative evapotranspiration (rET) is defined as the ratio of AET to maximum evapotranspiration (MET), i.e. the evapotranspiration of the same crop at the same phenological stage under non limiting water conditions.

Actual evapotranspiration is said to equal reference evapotranspiration when there is ample water. Some US states utilize a full cover alfalfa reference crop that is 0.5 m in height, rather than the short green grass reference, due to the higher value of ET from the alfalfa reference.

Evapotranspiration can be computed as reference, potential, or actual evapotranspiration. Reference evapotranspiration is that from a grass surface that is well-watered. Potential evapotranspiration is that from a surface that has unlimited water (such as a lake).

Student Help Students can submit a ticket using the OIT Technology Portal, calling 208-885-HELP (4357) or emailing support@uidaho.edu.

University of Idaho Extension provides reliable, research based education and information to help people, businesses and communities solve problems, develop skills and build a better future.

(1998) for calculating reference evapotranspiration of a hypothetical crop having a height of 0.12 m, a surface resistance of 70 s m−1 and an albedo of 0.23 is:(21) PM − ET O = 0.408 ∆ R n − G + y ( 900 / ( T avg + 273 ) ) u 2 ( e s − e a ) ∆ + y ( 1 + 0.34 u 2 ) where is the net radiation at the crop surface (MJ m−2 ...

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© Copyright 1997-2025
airSlate Legal Forms, Inc.
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Form Packages
Adoption
Bankruptcy
Contractors
Divorce
Home Sales
Employment
Identity Theft
Incorporation
Landlord Tenant
Living Trust
Name Change
Personal Planning
Small Business
Wills & Estates
Packages A-Z
Form Categories
Affidavits
Bankruptcy
Bill of Sale
Corporate - LLC
Divorce
Employment
Identity Theft
Internet Technology
Landlord Tenant
Living Wills
Name Change
Power of Attorney
Real Estate
Small Estates
Wills
All Forms
Forms A-Z
Form Library
Customer Service
Terms of Service
Privacy Notice
Legal Hub
Content Takedown Policy
Bug Bounty Program
About Us
Blog
Affiliates
Contact Us
Delete My Account
Site Map
Industries
Forms in Spanish
Localized Forms
State-specific Forms
Forms Kit
Legal Guides
Real Estate Handbook
All Guides
Prepared for You
Notarize
Incorporation services
Our Customers
For Consumers
For Small Business
For Attorneys
Our Sites
US Legal Forms
USLegal
FormsPass
pdfFiller
signNow
airSlate WorkFlow
DocHub
Instapage
Social Media
Call us now toll free:
+1 833 426 79 33
As seen in:
  • USA Today logo picture
  • CBC News logo picture
  • LA Times logo picture
  • The Washington Post logo picture
  • AP logo picture
  • Forbes logo picture
© Copyright 1997-2025
airSlate Legal Forms, Inc.
3720 Flowood Dr, Flowood, Mississippi 39232