NOVELTY - A portable kiln (10) for combustion of agricultural wastes comprises central cylindrical combustion chamber including system for control of combustion air to combustion chamber, second concentric cylinder including system for the flow of cooling water through first annulus between central combustion chamber and second concentric cylinder, a system for feeding of agricultural waste into central combustion chamber, a temperature sensing device to measure and display temperature within the central combustion chamber during combustion of agricultural waste.    USE - As portable kiln for combustion of agricultural wastes, preferably cocoa pod husks, plantain (and banana) peels and cola nut husks (claimed), used for fertilizer as well as in food products and pharmaceuticals.    ADVANTAGE - The portable kiln produces substantially-pure potash from the ashes of agricultural wastes, preferably the ashes of cocoa pod husks, plantain (and banana) peels and cola nut husks, is that it generates a finished potash product, which unlike mined potash, is free from arsenic, and is useable in the food and the pharmaceutical additives industries. The organic potash produced by the kiln is a premium product which is useful in the production of animal feed supplements, cement, fire extinguishers, photographic chemicals, textiles, in brewing beer, as a catalyst for synthetic rubber manufacturing and in all applications where potash is needed.    DETAILED DESCRIPTION - A portable kiln (10) for combustion of agricultural wastes, comprises central cylindrical combustion chamber including system for the control of combustion air to the combustion chamber, second concentric cylinder (26) surrounding central cylindrical combustion chamber, where the second concentric cylinder including a system for the flow of cooling water through first annulus between the central combustion chamber and the second concentric cylinder, a system for the feeding of the agricultural waste into central combustion chamber, a temperature sensing device to measure and display the temperature within the central combustion chamber during the combustion of the agricultural waste, system for the recovery of ash from the kiln, and a system to enable controlling the temperature of combustion to 550-650 degrees C by a combination of increasing the supply of combustion air when the temperature in the central combustion chamber falls to 550 degrees C, and the introduction of cooling flowing water through the first annulus between the central combustion chamber and second concentric cylinder when the temperature in central combustion chamber approaches 650 degrees C.    DESCRIPTION OF DRAWING(S) - The figure shows isometric view of portable kiln.    Portable kiln (10)    Outer cylinder (12)    Partial top cover (22)    Concentric cylinders (24, 26)    Exhaust vent (28)    Opening (30)    Spring (32)    Upper end (34)    Lever mechanism (36)    Control rod (38)