We demoed a seed hawk 66' 12" spacing with twin wing openers. Look like it had good depth control on the seed but some of the fert was on top not sure what causes this as most of it is 2" deep in the middle. Pressure was around 900psi but fluctuated a lot.
Twin wing openers will push the fert out of its trench, we had twin wings on ours and we couldn't figure it out until I rode one the frame and watched what was happening, single knife openers do not push the fert out.
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