An object of the present invention is to provide a uniformly spreadable granular agricultural chemical formulation and to establish a method of scattering (applying) the formulation under the assumption that the spreadability of the agrochemically active ingredient is satisfactory so that the expected treatment effect of the agricultural chemicals can be obtained by local application even when algae are drifted by the wind and cover the surface of the water of the paddy field. A uniformly spreadable granular agricultural chemicals formulation which contains an agrochemically active ingredient, has a particle-size distribution such that 80% or more of the granules have a particle diameter of 3 mm or more, and has floatability on the water surface, and breaks down on the water surface within 30 minutes is obtained, and a method of scattering (applying) the above formulation on 5% to 50% of the total area of the paddy field applied from a levee at a distance of 1 m or more.