To minimise the expense we need liquid fertilizers with the highest analyses possible. This makes blending liquids somewhat challenging. High salt concentrations commonly interact and settle or "salt" out ruining the blend.
The traditional way to create a new liquid fertilizer blend is to make a benchtop blend first and subject it to conditions that reflect conditions the actual blend will face and see if it survives without salting out. Only if it passes these stability tests would the blend be released for production. Unfortunately this traditional protocol is time consuming and costly. In order to rapidly create new blends we need a slightly different approach.
It turns out that with a just a few basic blends, blends that are known to work without salting out, we can create nearly every analysis that might be required. Resticting the raw materials to just those known to work well means the constant benchtopping and stability testing can be eliminated.
Another "approved blend" is a mixture of 23-0-0 urea and 32-0-0. Example blends that can be obtained include 14-27-0, 19-19-0, 23-14-0 and 28-7-0. These are of course only a few of the possible combinations. To explore all the possible analyses for this blend check the graphical blending chart.
A temporary blend is a mixture of 32-0-0, 0-54-0 and 0-0-62. To explore all the possible analyses for this blend check the graphical blending chart.