5.42 CORN - SURFACE OR SUBSURFACE IRRIGATION

 

SMART FARMING     Successful with consultants

LESSON 5.42 CORN - SURFACE OR SUBSURFACE IRRIGATION


 

Surface Drip System: Typical Design

·         One drip laterals every 2 corn rows

·         Drip laterals every 1.5 m

·         Corn rows at every 0.75 m spacing

·         On lighter soil types, it is advantageous to move corn rows closer to the drip line

·         (0.60 - 0.55 m spacing)

·         Sub-mains are above the surface

·         Use 6 - 8 mil wall thickness drip lines

 

Subsurface Drip System: Typical Design

·         One drip laterals every 2 corn rows

·         Drip laterals every 1.5 m

·         Corn row spacing can be reduced to 30 cm to the side of drip lateral to minimize water use

·         Sub-mains are installed below the surface

·         Drip tape is installed 20 – 25 cm below the surface

·         Use 15 - 30 mil wall thickness drip lines with 30 - 40 cm emitter spacing

·         Use media filtration to minimize blockage potential, maximizing longevity of drip lines

·         GPS guided tractors critical for bed forming and sowing operations

·         SDI will match system water output with maximum daily crop requirement

·         Careful cultivation required over the top of drip lines

·         Can use offset deep rippers either side of the drip line to “renovate” beds with

·         GPS guidance

 





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