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SALES NOTE: In order to get to the optimum fert. placement we went to the trouble of designing a 3 tube combination to spare the liquid fert. on 15" spacing. Back in 1978 when we started working with Kansas State University on Dual application we were told to keep liquid phos. spacing between 10" and 18". Outside of 18" could cause streaking and below 10" was getting back to broadcasting. In other words, putting the spacing too narrow would make the bands of fert. too small, like broadcasting. So we came up with 15" to give you the strongest band inside of 18" for the optimum fert. placement. Another benefit of 15" versus 10" is the number of sq. pump tubes or orifices in pressure systems go down. If you try to decrease the number of outlets with a simple Y fitting you will not get an even distribution, because liquid adheres to itself and pulls itself in the direction it starts to bend. This is why you can siphon water uphill, because it pull itself. In order to divide evenly, it would require an orificed Y or tee and the orifice would need to be big enough to not cause too much back pressure against a sq. pump or rate of applicator could be affected.

We make a fitting # 25206 that pools liquid then as it fills to rises to the orificed holes giving you a better division.

All the tubes for Wheatland sweeps (fallow master, fallow king, and Baker) come with longer plow bolts to attach to the shank and tube straps to keep them behind the shank to avoid getting them bend; or dragging trash.

NOTE: The A-tube on combination tubes was changed in 1996 to a 1/2" NH3 and 3/8" liquid. They were both 3/8" and because of their length they were subject to breakage. Even though the 1/2" is harder to hide behind the sweep the life of the A tubes have been doubled. Because the seeps are so flat the tubes occasionally will get bent back away from the sweep and will need to be bent back into place.

This is why we build them out of black pipe instead of stainless steel. When stainless steel tubes get bent they usually break when you try to bend them back, so black pipe tubes can last longer.

Maintenance: When you are finished for the season, blowing the tubes out with air is best. Water can also be used to flush them out, but water can cause rusting so air is best. If the two fertilizers get together in a tube a white hard as rock build up will occur, if this happens hot water is the only way to unplug the tube.

NOTE: Outside of the tube you want the two to get together. The NH3 will encompass the liquid keeping it from tying up with your soil making it more available to the plant. The liq. phos. will tie up the NH3 and keep it from leaching and the two will form a band of concentrated fert.