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As a result of the changing values of planting grapefruit in Nakhon Pathom provinces decreased. People turn to row building construction condo and House instead of planting grapefruit grapefruit, so that we get from each market. It causes an error in the results of the experiment.

As a result of the changing values ​​of grapefruit grown in Nakhon Pathom reduced. People to build tenement houses, condominiums and replacement planting grapefruit. So we get a grapefruit each market. It causes an error in the results of the trial.

As a result of changing values of planting grapefruit in Nakhon Pathom province fell. People to build houses, instead of building condominiums and cultivated pomelo, pomelo, so we received each market.