The document describes a study evaluating the effects of a polymer gel (mOasis) on soil moisture levels and crop yields of processing tomatoes under regulated deficit irrigation. The study will take place on plots at the Center for Irrigation Technology, comparing control plots without the gel to treated plots where the gel is incorporated into the soil. Multiple treatments will vary watering levels, fertilizer amounts, and gel application rates. Soil moisture sensors and yield data on tomatoes will assess the impacts on irrigation water use efficiency and crop production under water-stressed conditions.

1. IRRIGATION TECH SEMINAR SERIES
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2. IRRIGATION TECH SEMINAR SERIES
Water Use Efficiency on Vegetable Crops
Water Use Efficiency for Specialty Crops- CDFA
9:00- 9:15 am Welcome to AgWaterEnergyCenter Bill Green
9:15- 10:15 am Management Strategies for WUE in Vegetable Crops Dr. Dave Goorahoo
10:15- 10:45 am mOasis Polymers Bardia Dehghanmanshadi
10:45-11:00 am Break
11– 11:30 am Polymer Study at Fresno State Kaomine Vang, CIT
11:30 – 12:00pm Optional Trip to the Test Site
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

3. IRRIGATION TECH SEMINAR SERIES
Purpose
• Objective
Evaluate the effects of mOasis gel on available soil
moisture in the root zone and by extension,
investigate its influence on crop yield of
processing tomatoes under regulated deficit
irrigation.
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

4. IRRIGATION TECH SEMINAR SERIES
Experimental Plot
• The experimental trial will be run in a field site
east of the Center for Irrigation Technology
main office. The size of the study area will be
approximately 14,400 square feet and contain
largely sandy loam soils. The field will be split
into 150 square feet plots split evenly into
control and treated areas. The varying plot
configurations are detailed further in Figure 1
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

5. IRRIGATION TECH SEMINAR SERIES
Layout
• 12 different treatments
1. 100% Water, 100% Fertilizer, 100% Treatment
2. 100% Water, 100% Fertilizer, 80% Treatment
3. 100% Water, 80% Fertilizer, 100% Treatment
4. 100% Water, 80% Fertilizer, 80% Treatment
5. 80% Water, 100% Fertilizer, 100% Treatment
6. 80% Water, 80% Fertilizer, 100% Treatment
7. 80% Water, 80% Fertilizer, 80% Treatment
8. 80% Water, 100% Fertilizer, 80% Treatment
9. 100% Water, 100% Fertilizer, No Treatment
10. 100% Water, 80% Fertilizer, No Treatment
11. 80% Water, 100% Fertilizer, No Treatment
12. 80% Water, 80% Water, No Treatment
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

6. California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center
IRRIGATION TECH SEMINAR SERIES
Layout
30 ft
I 1 F 1 T 1
I 2 F 2 C
I 1 F 1 T 1 - 3
I 2 F 1 T 1 - 2
I 1 F 1 T 2
I 1 F 2 T 1 - 3
I 2 F 1 T 2 - 3
I 1 F 2 C - 3
I 1 F 2 T 1 - 2
I 1 F 2 T 1
I 2 F 2 T 1 - 2
I 1 F 1 T 1 - 2
I 1 F 1 C - 3
I 1 F 2 T 2 - 2
I 2 F 2 T 1 - 3
I 2 F 1 T 1 - 3
I 1 F 2 C - 2
I 1 F 2 T 2
I 2 F 1 T 2
I 2 F 2 C - 2
I 1 F 2 T 2 - 3
I 1 F 1 C - 2
I 2 F 2 C - 3
I 2 F 1 T 1
I 2 F 1 C
I 2 F 2 T 2 - 3
I 2 F 2 T 1
I 2 F 2 T 2
I 2 F 2 T 2 - 2
I 2 F 1 C - 2
I 1 F 2 C
I 2 F 1 T 2 - 2
I 1 F 1 T 2 - 3
I 1 F 1 C
I 1 F 1 T 2 - 2
I 2 F 1 C - 3
East Block
North
80 ft
30 ft 20 ft
I 2 F 2 T 1 - 6
I 2 F 2 C - 5
I 2 F 2 T 1 - 4
I 2 F 1 T 1 - 6
I 2 F 2 T 2 - 5
I 1 F 2 T 1 - 4
I 2 F 1 T 2 - 6
I 1 F 1 C - 4
I 1 F 1 T 1 - 4
I 1 F 1 T 1 - 5
I 1 F 1 T 1 - 6
I 2 F 1 T 1 - 5
I 2 F 2 C - 4
I 2 F 2 T 2 - 6
I 1 F 2 T 1 - 5
I 2 F 2 T 1 - 5
I 1 F 2 C - 5
I 1 F 1 T 2 - 4
I 1 F 1 T 2 - 5
I 2 F 1 C - 4
I 1 F 1 T 2 - 6
I 1 F 1 C - 6
I 1 F 2 C - 4
I 1 F 2 T 1 - 6
I 1 F 1 C - 5
I 1 F 2 T 2 - 5
I 2 F 1 T 1 - 4
I 2 F 2 T 2 - 4
I 2 F 1 T 2 - 4
I 1 F 2 C - 6
I 2 F 1 C - 6
I 1 F 2 T 2 - 6
I 1 F 2 T 2 - 4
I 2 F 1 C - 5
I 2 F 1 T 2 - 5
I 2 F 2 C - 6
West Block
South
West
180 ft (5 ft per bed)
East
Buffer
Figure 1: Plot layout describing different mOasis gel
application rates (T1, T2, C), irrigation (I1, I2) and fertilizer (F1,
F2) treatments.

7. IRRIGATION TECH SEMINAR SERIES
Methods
• Control blocks get “No Treatment”
• Treated blocks will have “Polymer” shanked in
– Within the first 6 inches
– There will be a buffer between blocks
• Each plot is 10ft x 5 ft
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

8. IRRIGATION TECH SEMINAR SERIES
Equipment
• Data Loggers used to record
Soil Moisture Data
• Decagon EC-5 soil moisture sensors to record
the soil moisture content
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

9. IRRIGATION TECH SEMINAR SERIES
Data
• Yield
– Red, Green, Breakers, Non-Marketable, Disease
• Soil Moisture Data
• Nitrogen
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

10. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

11. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

12. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

13. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

14. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

15. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

16. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

17. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

18. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

19. IRRIGATION TECH SEMINAR SERIES
Yield Data
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

20. IRRIGATION TECH SEMINAR SERIES
Total N
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

21. IRRIGATION TECH SEMINAR SERIES
Total N
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

22. IRRIGATION TECH SEMINAR SERIES
Total N
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

23. IRRIGATION TECH SEMINAR SERIES
Total N
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

24. IRRIGATION TECH SEMINAR SERIES
Total N
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

25. IRRIGATION TECH SEMINAR SERIES
Problems
• Problems
– Bottom End Rot
– Small Fruit
– Spider Mites
• Soil Penetration Issues
– No moisture below 2 feet
– Irrigation Scheduling
– Season (Planting Date)
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

26. California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center
IRRIGATION TECH SEMINAR SERIES
Future Research
• Test Again Spring 2015
30 ft
I 1 F 1 T 1
I 2 F 2 C
I 1 F 1 T 1 - 3
I 2 F 1 T 1 - 2
I 1 F 1 T 2
I 1 F 2 T 1 - 3
I 2 F 1 T 2 - 3
I 1 F 2 C - 3
I 1 F 2 T 1 - 2
I 1 F 2 T 1
I 2 F 2 T 1 - 2
I 1 F 1 T 1 - 2
I 1 F 1 C - 3
I 1 F 2 T 2 - 2
I 2 F 2 T 1 - 3
I 2 F 1 T 1 - 3
I 1 F 2 C - 2
I 1 F 2 T 2
I 2 F 1 T 2
I 2 F 2 C - 2
I 1 F 2 T 2 - 3
I 1 F 1 C - 2
I 2 F 2 C - 3
I 2 F 1 T 1
I 2 F 1 C
I 2 F 2 T 2 - 3
I 2 F 2 T 1
I 2 F 2 T 2
I 2 F 2 T 2 - 2
I 2 F 1 C - 2
I 1 F 2 C
I 2 F 1 T 2 - 2
I 1 F 1 T 2 - 3
I 1 F 1 C
I 1 F 1 T 2 - 2
I 2 F 1 C - 3
East Block
North
80 ft
30 ft 20 ft
I 2 F 2 T 1 - 6
I 2 F 2 C - 5
I 2 F 2 T 1 - 4
I 2 F 1 T 1 - 6
I 2 F 2 T 2 - 5
I 1 F 2 T 1 - 4
I 2 F 1 T 2 - 6
I 1 F 1 C - 4
I 1 F 1 T 1 - 4
I 1 F 1 T 1 - 5
I 1 F 1 T 1 - 6
I 2 F 1 T 1 - 5
I 2 F 2 C - 4
I 2 F 2 T 2 - 6
I 1 F 2 T 1 - 5
I 2 F 2 T 1 - 5
I 1 F 2 C - 5
I 1 F 1 T 2 - 4
I 1 F 1 T 2 - 5
I 2 F 1 C - 4
I 1 F 1 T 2 - 6
I 1 F 1 C - 6
I 1 F 2 C - 4
I 1 F 2 T 1 - 6
I 1 F 1 C - 5
I 1 F 2 T 2 - 5
I 2 F 1 T 1 - 4
I 2 F 2 T 2 - 4
I 2 F 1 T 2 - 4
I 1 F 2 C - 6
I 2 F 1 C - 6
I 1 F 2 T 2 - 6
I 1 F 2 T 2 - 4
I 2 F 1 C - 5
I 2 F 1 T 2 - 5
I 2 F 2 C - 6
West Block
South
West
180 ft (5 ft per bed)
East
Buffer

27. IRRIGATION TECH SEMINAR SERIES
Questions?
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center

28. IRRIGATION TECH SEMINAR SERIES
Pre – Post Test
• Please complete the Pre and Post test and
Evaluations.
California State University, Fresno – Center for Irrigation Technology – AgWaterEnergy Center