Granular coated fertilizer

#The present invention relates to a controlled-release granular coated fertilizer.

#A controlled-release fertilizer, which is also referred to as slow-release fertilizer, can releases a fertilizer ingredient according to a growth of a plant in a designated time and so it is useful for labor-saving. At the present day, various controlled-release fertilizers are suggested and put to practical use, because of ripening of age employed in agriculture, decrease of the number of the employed and increase of side-job farmers.

#Japanese Examined Patent Publication No. Sho-54-39298-B describes a controlled-release granular fertilizer, which is coated with an inner layer of wax and outer layer of urethane resin.

#The following examples illustrate the present invention in further detail but are not to be construed to limit the scope thereof.

#The evaluation of the fertilizer dissolution was conducted by the method below.

#Namely, 7.5 g of a test sample is charged in a bottle and 100 ml of water is added thereto. After maintaining the bottle at 25° C. for designated days, the concentration of the fertilizer ingredient is traced by observing the conductivity of the water with a conductivity measuring instrument. As a result, dissolution amount of the fertilizer ingredient from the coated granules is measured and the dissolution behavior is observed.