Method for measurement and extraction of soil available phosphorus by non-shaking

摘要

PURPOSE: A method is provided to estimate the available phosphate even when a power is not supplied, while reducing cost by adopting a common shaker. CONSTITUTION: A method comprises the steps of checking the volume of extraction of soil available phosphate; extracting and quantizing the soil available phosphate in accordance with a common method using a shaker; converting the quantized volume of available phosphate into the volume of a common method using a conversion coefficient; and comparing degree of analysis precision with respect to a common method. The solution extracted by Lancaster method is intermittently stirred during 1 to 60 minutes under the non-shaking condition. The solution is composed of CH3COOH, NH4F, (NH4)2SO4, NaOH, and lactic acid dissolved into a distilled water.