Determining the fertilizer requirement of soil comprises mixing soil with water and comparing an indicator reading with a scale associated with a look-up table

摘要

Determining the fertilizer requirement of soil comprises mixing a predetermined volume of soil with a predetermined volume of water in a beaker, pouring the resulting solution into another vessel, contacting an indicator with the solution, comparing the indicator reading with a scale to determine an initial value, reading details of the nutrient supply state of the soil from a table in dependence on the initial value, and reading a fertilizer quantity recommendation on the basis of the initial value. An independent claim is also included for a soil laboratory for determining the fertilizer requirement of soil, comprising an indicator, a sample beaker, a comparative scale for the indicator reading, and a table based on the comparative scale with details relating to the nutrient supply state of the soil and the amount of fertilizer needed.