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On-Farm Testing and Evaluation of Drip Lateral Systems in Southeast Asian Vegetable Production

This document details the on-farm testing and evaluation of various drip lateral systems, including high and low flow rates, in Southeast Asian agricultural practices. It assesses systems like Adrilite, Chapin, T-tape, and Das Agro Plastics for their efficacy in vegetable cultivation. Key factors considered are flow rate uniformity, soil moisture levels, crop yield and quality, and clogging issues. The aim is to identify the most cost-effective and efficient systems while addressing urgent challenges faced by irrigation product customers.

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On-Farm Testing and Evaluation of Drip Lateral Systems in Southeast Asian Vegetable Production

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  1. Adrilite KB Drip Baffle (control) Chapin Das T-tape On-farm drip lateral testing

  2. Southeast Asian/Chinese wide bed system

  3. “Turbulent flow” drip tubing—not easy to manufacture

  4. Drip lateral testing Drip lateral testing: 3 high flow, 3 low flow very low pressure (1.5 psi)

  5. Total marketable yields

  6. Income per plot (Kyats)

  7. Water Discharge among 6 Drip System Laterals (day 13*)

  8. Soil moisture

  9. Do we really need containers at all?

  10. Drip laterals under evaluation High flow rates: -Nepali “Baffle” system -India’s KB Drip (microtube) -Adrilite (like Netafim’s internal turbulent flow emitters Low flow rates (turbulent flow): -T-tape -Chapin Watermatics tape (now Jain) -Das Agro Plastics (India)

  11. Observations: -Flow rate/100 ft -Emitter uniformity -Soil moisture -Clogging -Crop yield -Crop quality -Vigor ratings -Uniformity ratings -Income

  12. big problem: water container$ • Must be inexpensive • Accommodate a valve • Close at top • Self-supporting, frame, etc.—3 psi (1.5-2 m height) min. pressure • Easy to clean and transport……..BUT…

  13. Irrigation product customers often have other urgent problems

  14. IDE crop advisory services? • Irrigation system design (drip, etc.) • Improved varieties and seeds • Seed production assistance • Disease/pest diagnostic service (i.d.) • Pest management advice and recommendations (FFS training programs) • Simplified soil testing

  15. Drip lateral screening • “Quick and dirty” farmer participatory research (screening) • Eliminates the poorest performers rather than identifies “the best” • Better performers evaluated in wider farmers’ field testing

  16. Questions—drip lateral lines • Which perform best at v. low pressure (1.5-3 psi)? • Which result in best veg. crop yields/quality (Asian bed system) • How long will they perform well (durability, resistance to clogging)? • Which easiest to use, maintain, store? • Which most cost effective?

  17. Drip lateral testing

  18. Vegetable seed -market assessment, -production feasibility

  19. Vegetable seed production • High value • Proximity to market less important (remote areas) • Few “postharvest” problems • Collaboration possible with private cos. • Contract production model • Indegenous/local varieties

  20. Leaf lettuce size

  21. Water Discharge among 6 Drip System Laterals (day 1*)

  22. Water Discharge among 6 Drip System Laterals (day 3*)

  23. Water Discharge among 6 Drip System Laterals (day 7*) Clogging?

  24. India’s“microtube” drip system

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