The present investigation was intended to furnish information concerning:
(1) The movement of water-soluble and exchangeable potassium in the soil profile after successive fertilizer applications.
(2) The form of potassium—exchangeable, soluble, or non-exchangeable—into which added potassium fertilizer is converted in the soil.
(3) The effect of doubling the fertilizer ration on the absorption of potassium by the soil; and the effect of doubling the ration of irrigation water on the absorption and accumulation of potassium in the soil.
(4) The effect of frequent successive summer irrigation following fertilizer application on the distribution of the three forms of soil potassium.
(5) The effect of fertilization followed by irrigation on soil pH. value.