Kagome / Netafim Twin Lateral Trial Kagome / Netafim Twin Lateral - - PowerPoint PPT Presentation

Kagome / Netafim Twin Lateral Trial

• The Problem…
• Application of technology – the Israel trip
• What we are hoping to achieve
• New dripper technology
• Low flow Concept
• Trial System Design
• Results
• Moving Forward

Kagome / Netafim Twin Lateral Trial

The Problem Sub-surface drip issues

250mm Drip tape soil compaction/consolidation root growth cracking/fracturing

What are trying to achieve

• Its been clearly identified that year on year concentrated irrigation

is causing soil consolidation/compaction and a change in conditions around the drip tube that is resulting in yield reduction over time.

• We can show that by ripping this country we can break up this

consolidated zone and improve yields potentially back to a year 1 result

• Following a trip to Israel we learnt that emitter technology is

heading towards the ability to use lower flow rates.

• These lower flow rates are showing a tendency to have much better

lateral movements of water than our traditional flows, this gives us the option of laying 2 laterals in our beds which means we then have the option of ripping between the laterals each year allowing us to potentially not experience the yield drop

Du Dual La Lateral l – Con

• ncept

Standard cracking/fracturing Dual lateral Still some soil consolidation? Ripping in centre of bed to facilitate root development root growth Larger root system = greater yield potential

Du Dual La Lateral l – Trial rial De Design

Standard 250mm Drip tape Dual lateral #1 150mm 400mm Dual lateral #2 200mm 400mm Dual lateral #3 250mm 500mm

Du Dual La Lateral l – Trial rial De Design

Dual Lateral Trial Merrybank - Valve 22 (1.7Ha) Farm Bunnaloo Rd Entrance Submain/Riser Valve/RTU 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 North North Channel

Variety H1175 mix Planting date 20th November Planting density 18,000/Ha Pre Plant Fertilizer 350kg/Ha – 70 %DAP, 30% Potash Blend (45 units N, 50 units P) Fertilizer total units 330 N, 94 P, 52 K, 35 Ca Metham date 4th November Pre Irrigation 2ML/Ha Water Use to date 5.9ML/Ha Paddock History 2014/15 Tomato (H4401) 2015/16 Fallow 2016/17 Tomato (H3402 mix) 2017/18 Fallow Predicted Yield 100T/Ha

Block Details

Date Table Original system Twin Lateral Row/Bed Spacing 1.52 1.52 Discharge (lph) 1.00 0.50 emitter spacing (mt) 0.50 0.50 laterals per bed 1 2 Application rate (mm/hr) 1.31 1.31 Block run length – 366mt Original Tape diameter – 22mm Trial Tape Diameter – 16mm

Trial Design

11

Non PC Emitter considerations

Most important is the dripper‘s clogging resistance The larger the water passage area, the lower is the dripper's sensitivity to clogging Shorter water passage length = Stronger turbulence = Lower dripper sensitivity to clogging The larger the surface

• f the dripper's filter,

the more resistant to clogging

• Aries
• Minimum 15mil WT
• Largest filter
• More open flow path
• Best able to handle poor water
• 4 years plus
• Typhoon Plus
• Max 15mil WT
• Largest emitter filter in class
• 2 to 5 years
• Flow rates from 0.50lph
• Streamline X
• Max. 10 mil WT
• Short term Crops
• 1 to 2 years

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Non PC Emitter Range

• Post-plant water was 24 hours (0.3ML/Ha) less than

the rest of the farm

• Yield resulted in 100t/ha
• Moving Forward:
• Continually regrow trial area to evaluate yield/growth
• Comparing lifting and replacing tape 2019/20
• Larger scale twin lateral trial 2020/21 upon renewal
• Single use tape
• Surface Irrigation

Results

Th Thank You

THANK YOU