What are suspension fertilizers? Why can they contain more potash than solution fertilizers?
Suspension fertilizers are products in which the fertilizer is not held in a true solution but is held in a suspension, much like mud in water. Suspending agents, such as attapulgite clay, are used to prevent the fertilizer material from settling out. You can blend more potash into a suspension fertilizer because it does not actually have to go into solution to remain dispersed in the liquid. Suspensions will settle out if you don’t use them soon after blending, so you should use suspension fertilizers the same day they are blended. Some contact herbicides, such as paraquat, are deactivated by binding to negatively charged clays. If the application contains paraquat, you must use suspending agents without negative charges. These suspending agents (for example, xanthum gum products) are usually more expensive than the clays otherwise used in formulating fertilizers. What are some common grades of suspension fertilizers? Almost any grade of suspension fertilizer can be blended, so there
