crop water requirement
New Book Series on Micro Irrigation just Published
Research Advances in Sustainable Micro Irrigation
Click to download pdf flyers
Vol. 1. Sustainable Micro Irrigation Principles and Practices
Vol. 2. Sustainable Practices in Surface and Subsurface Micro Irrigation
Vol. 3. Sustainable Micro Irrigation Management for Trees and Vines
Vol. 4. Management, Performance, and Applications of Micro Irrigation
Vol. 5. Applications of Furrow and Micro Irrigation in Arid and Semi Arid Regions
Solar Radiation Data Available for Northern Caribbean Region
Solar radiation data can be downloaded for the Northern Caribbean Region. Daily, monthly and annual data are available.
Courses offered this semester at UPRM: Farm Irrigation and Agroclimatology (TMAG)
I will be offering the following two courses this semester at UPR-Mayaguez. Please click the following links for the course fliers.
TMAG 5017 Agroclimatology
TMAG 4019 Farm Drainage and Irrigation Systems
Please feel free to contact me if you would like additional information about either course.
Eric Harmsen, Professor
University of Puerto Rico
Dept. of Agricultural and Biosystems Engineering
Mayaguez, Puerto Rico 00681
email: harmsen1000@hotmail.com, eric.harmsen@upr.edu
phone: 787-955-5102
websites: http://pragwater.com , http://bahai.org
Daily Reference Evapotranspiration (ETo) for Haiti and the Dominican Republic
Daily reference evapotranspiration (ETo) is now available for Haiti and the Dominican Republic. CLICK HERE to visit the new pragwater page, which provides a link to the daily image data and the method background information. The page also provides information related to the practical application of the results for scheduling irrigation in Haiti and the Dominican Republic.
ACKNOWLEDGEMENTS: This research received partial funding from the following sources: NOAA-CREST (grant NA06OAR4810162) and USDA Hatch Project (Hatch-402). Special thanks to Dr. John Mecikalski for providing the solar radiation data, and Alejandra Rojas for providing various GIS maps used in this research. I would like to thank my student, Victor Reventos, who made this possible through his Python programming skills.
DISCLAIMER: The information is provided “as is”. The authors and publishers of this information disclaim any loss or liability, either directly or indirectly as a consequence of applying the information provided herein, or in regard to the use and application of said information. No guarantee is given, either expressed or implied, in regard to the accuracy, or acceptability of the information.
Course offerings this semester at UPRM: Farm Irrigation and Agroclimatology (TMAG)
I will be offering the following two courses this semester at UPR-Mayaguez. Please click the following links for the course fliers.
TMAG 5017 Agroclimatology
TMAG 4019 Farm Drainage and Irrigation Systems
Please feel free to contact me if you would like additional information about either course.
Eric Harmsen, Professor
University of Puerto Rico
Dept. of Agricultural and Biosystems Engineering
Mayaguez, Puerto Rico 00681
email: harmsen1000@hotmail.com, eric.harmsen@upr.edu
phone: 787-955-5102
websites: http://pragwater.com , http://bahai.org
CROP WATER USE ( HARGREAVES ET EQUATION) NEW WOLFRAM ALPHA WIDGET
CROP WATER USE ( HARGREAVES ET EQUATION) NEW WOLFRAM ALPHA WIDGET. Reference: Hargreaves, G. H. and Z. A. Samani, Reference Crop Evapotranspiration from Temperature. Appl. Eng. Agric., ASAE. 1(2). 1985,. pp.96-99.
Widget Application: Suppose you want to schedule irrigation by replacing the water evapotranspired by your crop each day. 1. Click on the appropriate link to get yesterdays solar radiation for your location: Puerto Rico or Northern Caribbean, 2. Check the internet for the average daily air temperature at your location (average = (minimum + maximum)/2), 3. Get the appropriate crop coefficient for your crop from this link, and 4. Finally, enter solar radiation, air temperature and crop coefficient into the widget to estimate ET. Multiply ET x acres x 1069.0663 to get the number of gallons of water you need to apply to your field.
NOAA CREST SUMMER CAMP at UPRM
Students from across Puerto Rico attended the NOAA CREST Summer Camp this week on the UPRM Campus. This afternoon, they attended a workshop by Dr. Eric Harmsen, which focused on the use of GOES-PRWEB for scheduling irrigation in Puerto Rico. Irrigation scheduling is important for water conservation and for achieving optimal crop yields. The presentation is provided below:
DOWNLOAD PDF PRESENTATION HERE
Smart Irrigation
Product Review: Remotely accessible irrigation management tool from Koubachi
Cool!! Remotely accessible sensor for managing irrigation and other stuff. The device is sold by a Switzerland-based company called Koubachi. Too expensive for house plants but could be great for agricultural applications. http://allthingsd.com/20130613/high-tech-help-for-the-green-thumb-challenged/.
The review focuses on the remote (mobile) accessibility of the device, which is amazing, but doesn’t talk at all about how accurate the internal sensors are. If anyone has this information please leave a comment. I also will try to check on this.
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PRAGWATER 
