| 摘要 |
PROBLEM TO BE SOLVED: To provide a salt accumulation determination method by which even a solo proprietor can easily determine, and a soil EC sensor suited for the salt accumulation determination method.SOLUTION: The salt accumulation determination method includes: injecting glucose into soil, the salt accumulation of which is intended to determine, near an EC sensor; and continuously determining an EC (Electrical Conductivity) value. In due time, the EC value reaches a minimum value. The EC value at that time is acquired as an ECbase. When the EC value increases again, a reference culture medium is injected near the EC sensor. It is checked that the EC value increases with the lapse of time from the EC value when the reference culture medium has been injected and returns to an original value again when the decrease reaches an extremum. The salt accumulation is determined by comparing a value obtained by subtracting the EC value when the reference culture medium is injected from the EC value when reaching the extremum, with ECbase.SELECTED DRAWING: Figure 3 |
