Where to buy?? K2O.. potassium oxide

Soil test says all I need for iron clay peas and legumes is 40 lbs per acre of potassium oxide. Where can I buy this??

Pretty sure you're just needing potash or K. Go to the coop and ask for 0-0-60. Two 50lb bags (100 lbs total) would give you 60 lbs/ac. So maybe 1 1/2 bags per acre. Probably wouldn't hurt just to go ahead and add both bags unless you're planting a lot of acres where cost would play a bigger factor.

Thanks... you are right!!! I just confirmed that it is potash that I need!!