We just got through laying our polypipe through head high and above corn and was surprised at how easily it snapped off where we had to drive. We lay double pipes across most fields and I don't try laying two lines with one pass. Two passes across the field really left a wide broken over area. Corn was a good bit smaller last year and didn't break over near as bad. Ours wasn't quiet knee high when we made our cultivator and direct spray pass this year. This was the whole area the tractor covered even the dual wheel hubs sticking our broke corn off.