Definitions:

1. A mineral composed primarily of potassium chloride and magnesium sulfate, that typically forms as evaporite deposits in saline environments such as salt lakes and salt deposits. NOUN
   • The unique composition of kainite makes it an ideal ingredient for enhancing crop yields.
2. A natural salt consisting of hydrous sulfate and chloride of magnesium and potassium that is used as a fertilizer and a source of potassium and magnesium compounds. NOUN
   • The use of kainite reduces the need for chemical fertilizers, promoting sustainable agricultural practices.