The TT-300 is sold as a nitrogen applicator, not a phos applicator and certainly not for 30 gallons of N either.  It does well as a 10-15 gal/a bridge between planting and side dress or pre plant and an indexed boost.

You could mix some 10-34-0 in with the 28% thru the TT-300 but I would limit the N much lower unless you have a regular Heavy Duty 2x2 (and in with this much N set it 3x3) in the ground, usually single disk fertilizer coulter such as the JD or Kinze HD single disk units.

The thing that hold on to N is when it comes into contact with and latches onto a moist soil particle. There are usually quite a few loose, moist soil particles behind two Curvetines per row. How ever definitely not enough to latch onto 30 gal of 28%!

30 gal of 28% is almost 100 units of N! Depending on soil conditions and weather/rain, 30 gal of 28% N too close to the seed can fry a lot of expensive seed.  jmho and experience.

Jim at Dawn

The basic issue with ANY planter row unit fertilizer attachment that places the fertilizer significantly to the side and deeper than the seed in the soil is that it induces significant and variable vertical and torsional forces into a planter row unit that we are try to get to place seed at a uniform depth with minimal compaction.

The Totally Tubular TT-300 may not provide "perfect" fertilizer placement but it has no negative effect on the basic job of the row unit which is to plant seed, not be a fertilizer applicator. It also sells for under $40.

Jim at Dawn

Carson I don't have pics on this computer.....but they may be on NAT if you search.

I made a setup similiar to the 2 tubes coming off the closing wheel? except mine is in front of the CT's and it does a VERY good job of incorperating....

I'd have to look but I think it was the "FMC" setup I started with and modified.... It's basically a 1/8 inch tube going down the hole for insectacide on a DEERE planter...I T'd with a 1/4 inch T and came down with rubber tubing.  I ended up about 1.5 inch off each side of the row...

The biggest mistake I made in the deal was to use plastic on some parts.....I'm in the process of switching that all out to stainless as the plastic became brittle and breaks to easy.   I can get you pics later if you need?

found a link-- http://talk.newagtalk.com/forums/thread-view.asp?tid=18664&mid=127525#M127525