The method of applying fertilizer will depend very much on the scale of the operation, the tools available, and the type of fertilizer being used. In general, fertilizers come in just two different formats: liquid or dry. Liquid fertilizers could be chemical or natural (such as fish fertilizer or compost tea), and dry fertilizers include everything that isn’t liquid, including compost, manure, and powdered or granular fertilizers. There are also some dry fertilizers that are made to be diluted in water before use.
After determining what type of fertilizer to use and the format, the next (very important) step is to determine how much to use for your Common buckwheat. Detailed formulas are available to help you calculate the correct application to get a high yield without over-fertilizing.
For larger operations, tractor-attached applicators can be used to scatter dry fertilizer or evenly spray liquid fertilizer. Home gardeners can apply fertilizer by hand or by using readily-available garden tools. Be sure to water thoroughly after watering with any dry fertilizer to be sure that it soaks into the soil.