RESIDUAL AGRICULTURAL CHEMICAL CONCENTRATION CALCULATION METHOD AND SUITABLE FARM PRODUCE HARVESTING TIME DETERMINATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a calculation method for residual agricultural chemical concentration of farm produce, and moreover, to provide a method for calculating the time required for the agricultural chemical concentration to fall below a reference value if the agricultural chemical concentration exceeds the reference value.;SOLUTION: In this calculation method for the residual agricultural chemical concentration of farm produce in and out a farm field which is an agricultural chemical spreading object, a plurality of determination bodies 1, 1, ... each having a non-water absorbing planate agricultural chemical deposition surface are placed at measurement points in and out the farm field to collect measurement plates 2 after spraying the agricultural chemical or before a harvesting time. An analyzer 10 and a computer 11 are used to measure the amount of the agricultural chemical deposited on the determination body 1 while calculating the agricultural chemical concentration based on an actual residual concentration relational table 13 of the amount of spread agricultural chemical to the amount of residual agricultural chemical in the farm produce. Further, suitable farm produce harvesting time is determined based on a rise-and-fall relational table 14 of the amount of spread agricultural chemical to a rise-and-fall process of the amount of the residual agricultural chemical in the farm produce.;COPYRIGHT: (C)2008,JPO&INPIT