Kainit
Categories:
COMMERCIAL SOURCES OF PLANT-FOOD
Unlike muriate and sulphate of potash, kainit is a crude
product of the German mines, having received no treatment to remove
impurities. It contains 12 to 13 per cent of potash, and is rated as a
sulphate, but one third of it is common salt, and in effect upon
quality it should be classed with muriate and not sulphate. Its low
content of plant-food should confine its use to regions relatively near
the seaboard. When shipped far inland, the price becomes too high to
give a reasonably cheap pound of potash.