Other

Sekisui Chemical Co., Ltd.

Mitsubishi Plastics, Inc.

Kubota-c.i. Co., Ltd.

Paddy Research Co., Ltd.

Kabushiki Kaisha Paddy Kenkyusho

Tsuneo Onodera

Yoshihito Fujii

Masashi Numabe

Naoki Ono

Hiroaki Sakamoto

Kazuhiro Hirao

Toshinobu Kakita

Yasushi Wada

Tsuneo Otake

Shigetaka Isoyama

Yoshiaki Watanabe

Kiminori Takao

Taisuke Hashimoto

A subirrigation systemincludes a water-impervious member, and keeps water content in soil of a cultivated landin a proper state for growing a plant. The water-impervious memberis formed into an upper opening vessel shape, and has a water reserving function. Water is fed to an inner portion of the water-impervious memberfrom a water tankvia a feed water pipe, whereby a soil portionin a gravitational water state is formed. A water levelof the gravitational water within the water-impervious memberis properly controlled to a desired water level by a water level controllerprovided in the feed water pipe. The gravitational water within the water-impervious membercontrolled to the desired water level is appropriately sucked up to the soil in an upper layer in accordance with a capillary phenomenon. Accordingly, a soil portionin a capillary water state having proper water content is formed in the cultivated land

Subirrigation system

A seed top of foamed cells is constructed such that a porous sheet having open cells is affixed to one surface of a thin support band extending in a band-like configuration with its widthwise direction being an up-and-down direction, and accommodation recesses for accommodating seedling seeds are provided in the porous sheet. It is possible to reduce the size and weight of the seedling raising sheet used for raising seedlings and to eliminate the need for soil in raising seedling, thereby enabling an industrial mass-production of the seedling raising sheet.

Seedling raising sheet, method of manufacturing same, seedling raising method, culturing method, and transplanter

Water level regulating device for paddy field

Growing community of inventors

Miyagi, Japan

Tsuneo Onodera