fertilizer's Ratio tells us much more about how appropriate a fertilizer is than its NPK %. 20-20-20 and 10-10-10 are both 1:1:1 ratio fertilizers, but the 20-20-20 has twice the amt of nutrients per given weight as 10-10-10. Similarly, 24-8-16 is twice as concentrated as 12-4-8, so you would...