The present invention provides a smart soil moisture control device for multipurpose farmland. It relates to a smart control technology applicable to the cultivation of agricultural crops in a rice paddy for multipurpose farmland. Soil moisture measurement technology suitable for multipurpose farmland is combined with field measurement and control technology using wireless communication. Smart water saving type soil moisture control system and applications are applied to optimize soil moisture per crop suitable for multipurpose farmland. The smart soil moisture control device includes a plurality of soil moisture sensing modules; a timer; a water supply tank; a water supply pump; a plurality of water supply lines; a drainage pump; and a control panel.
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