This article forms part of a series concerning the development of methods of compost tea application via the keyline plow which are being published on taranakifarm.com

Part 1 : Introduction
Part 2 : Designing the Keyline Plow Frame Extension
Part 3 : 1:1 Wooden Scale Model
Part 4 : Re-Inventing the Herbicide Tank
Part 5 : Farm Like a Gardener
Part 6 : The Final Prototype

Making Progress

I believe I’ve solved the tank (and equipment) frame extension question. The photos below mostly speak for themselves, although I’ll elaborate for the enthusiastic.

We made up a simple frame extension of welded steel box section that will form a platform for mounting the compost tea tank. In the photo below, you’ll notice I’m supporting the frame extension with timber, which obviously won’t do. So, next I’ll weld plate steel “L” brackets onto the extension where it meets the upper beam of the original keyline plow frame (positions A & B below). Then drill bolt holes so I can employ “L” shaped bolts. The same kind those used on the plow. I like standards and it makes everything multi-use, opening the door for more creative ideas.

Bolting onto the upper beam will support the extension, although it will not hold any significant weight. To solve this problem I will do the following.

Because the keyline frame is essentially a tool bar allowing great variation, it is essential to consider this variation when designing additions. To create a decent sized platform, my frame extension extends beyond the depth of the original frame, so it will require diagonal plate steel supports to bare weight. These will bolt to both the lower keyline beam and the new extension. This will give the extension support from below, as I intend to apply considerable weight to the platform above. As such I’ll need to make up at least two, maybe three supports.

A profile illustration of these supports is pictured left. To maintain a thin profile and not consume too much space on the rear keyline tool bar, I’ll most likely opt for plate steel. I must cut triangles out of each end of the plate piece to match the new frame extension and also the keyline plow. To sure this up, again, “L” constructs to bolt on.

These supports are then completely adjustable, which allows me to relocated the shanks and coulter beams without worrying about ‘permanent’ frame extension supports being in a fixed position. If they are in the way, I can just shift them, left for right. Total freedom. The general position is shown as dotted lines in the image below.

This extension also allows ample clearance beneath the tank platform should I need to access the shanks during plowing to change over a shear pin etc.

Next : 1:1 Woodend Scale Model