adrilite chapin kb drip t-tape das (control)baffle on-farm drip lateral testing
TRANSCRIPT
Total marketable yields
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12
Baffle Das tape T-tape KB drip Chapin tape Adrilite Sprinkler cans
Drip lateral types
Wei
gh
t in
Kg
Total marketable yield (kg/plot) of leaf lettuce using 6 drip laterals
Income per plot (Kyats)
Gross Income from 50 ft bed leaf lettuce, 6 drip laterals
12788
6338
10500
12150 11925
13350
11438
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14000
16000
Baffle Das T-tape KB drip Chapin Adrilite Sprinker cans
Kya
ts
Drip lateral types
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Hours from start
Wa
ter
rem
ain
ing
in
ta
nk
(g
all
on
s)
Baffle
Das tape
T-tape
KB drip
Chapin tape
Adrilite 2 Jan 07
Water Discharge among 6 Drip System Laterals (day 13*)
Soil moisture
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24-Dec 25-Dec 26-Dec 27-Dec 28-Dec 29-Dec 30-Dec 31-Dec 1-Jan 2-Jan 3-Jan 5-Jan 7-Jan
Date of reading
ce
nti
ba
rs
Baffle
Das tape
T-tape
KB drip
Adrilite
Watermark soil moisture sensor readings* for 5 types of drip irrigation laterals
Irrigation
*8 inches from lateral, 3 in. depthCrop: leaf lettuce
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)
Observations:-Flow rate/100 ft-Emitter uniformity-Soil moisture-Clogging-Crop yield-Crop quality-Vigor ratings-Uniformity ratings-Income
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…
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
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
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?
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
Leaf lettuce sizeSize distribution of leaf lettuce plants among 6 drip laterals
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90
Baffle Das T-tape KB drip Chapin Adrilite Sprinker cans
% o
f to
tal
%Large %Med
%Small
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70
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Hours from start
Wa
ter
rem
ain
ing
in
ta
nk
(g
all
on
s)
Baffle
Das tape
T-tape
KB drip
Chapin tape
Adrilite
*21 Dec 06
Water Discharge among 6 Drip System Laterals (day 1*)
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60
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Hours from start
Wa
ter
rem
ain
ing
in
ta
nk
(g
all
on
s)
Baffle
Das tape
T-tape
KB drip
Chapin tape
Adrilite
*23 Dec '06
Water Discharge among 6 Drip System Laterals (day 3*)
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60
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Hours from start
Wa
ter
rem
ain
ing
in
ta
nk
(g
all
on
s)
Baffle
Das tape
T-tape
KB drip
Chapin tape
Adrilite*27 Dec 06
Water Discharge among 6 Drip System Laterals (day 7*)
Clogging?