need help for a 12 x 60 garden

Seattle, WA

I am in NM at 6,500 feet, zone 5. I have a garden 12 x 60 on a 10 degree slope. Trying to get this slope irrigated has been a frustrating process. I have a 7 zone drip irrigation system that works acceptably, except for this garden.

The garden is fed from two tanks: a 2,000 gallon tank from gravity and a 1,000 gallon tank with a pump. Two 1/2" lines run parallel down the slope on each side of the garden. They are from each tank. They are connected by 1/2" hose that runs between them in my rows. Even though the slope downhill is obvious I am finding it so frustrating that the very bottom of the rows is receiving no water. With 1/2" hose and gravity at work you would think that the bottom rows would have plenty of water.

I would really appreciate some experienced help with this matter. With corn planted in the bottom rows getting those seeds water is a must!

Thank you in advance for your help in this matter.

Gene so

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