PROBLEM TO BE SOLVED: To reduce an amount of a fertilizer or a chemical supplied to a farm field with regard to a supply position of individual seedlings or rice seeds to the farm field.SOLUTION: Intermittent feed mechanisms 70 are provided in such a manner that one supply position of seedlings or rice seeds supplied by a planting/sowing device is set to be a first reference position, and a supply position of a fertilizer or a chemical by a granular feeder, which is a position nearest to the first reference position, is set to be a second reference position. Supply operation of seedlings or rice seeds or a fertilizer or a chemical is controlled in such a manner that a separation distance from the first reference position to the second reference position is shorter than a separation distance from supply positions of seedlings or rice seeds adjacent to each other in the front or back of a traveling direction with regard to the first reference position to the second reference position, and a separate distance from supply positions of seedlings or rice seeds adjacent to each other in a right/left direction with regard to the first reference position to the second position.【課題】個々の苗又は種籾の圃場への供給位置に対する肥料又は薬剤の圃場への供給量を節減できるようにする。【解決手段】間欠供給機構７０を備え、植播系作業装置による苗又は種籾の一つの供給位置を第１基準位置とし、その第１基準位置に最も近い位置の粉粒体供給装置による肥料又は薬剤の供給位置を第２基準位置として、かつ、第１基準位置から前記第２基準位置までの離間距離が、第１基準位置に対して進行方向の前後で隣り合う箇所の苗又は種籾の供給位置から第２基準位置までの離間距離、及び第１基準位置に対して左右方向で隣り合う箇所の苗又は種籾の供給位置から第２基準位置までの離間距離よりも短くなるように、苗又は種籾や肥料又は薬剤の供給作動を制御する。【選択図】図１２
