Carrots are Picky Eaters April 12, 2013 00:38
|Carrot fertilizer||N||P||K||Parts||Mass (g)||mass per kg|
Since we know the ingredients, and there are only three, we can now fiddle with the numbers to get the ratios right. For example, the only ingredient with a non-zero P column is Rock phosphate, so we need 3 parts rock phosphate because 3x3 is 9, the target P. Then we see that Kelp Meal is the only one with a non-zero N entry, so we need 1 part kelp because 1x1 is 1, the target N. This puts us at 2 for K, one short of the target 3, so we need 1/3 part greensand to make up the difference. More complex recipes can be solved as a system of equations, or using linear algebra. Maybe one day I'll write a little software program to do it (does anyone know of something like this that exists?) The mass per kg is probably the most useful column here as it tells you how much of each ingredient to add per kg desired fertilizer. The mass column is based on an arbitrary 1 part = 900g, which is what I mixed here:
Kelp meal, rock phosphate, and greensand measured out and ready to be mixed.
Stir it up and there you go! Carrot-specific fertilizer. Recommended usage is 1 cup (approx 260 grams) per 8 feet of row.