PROBLEM TO BE SOLVED: To scatter an application agent nearly uniformly on a cross-section of a ridge in a partial tilling fertilization.SOLUTION: A tilling rotary 6 and a ridge former 7 to receive tilled soil and form a ridge are attached at the back of a tractor body 1. A plurality of tilling tines 23, 23, ... and a pair of disks 25, 25 corresponding to the width of the ridge formed by the ridge former 7 are attached to a tilling shaft 15 of the tilling rotary 6, and a powdery or granular application agent delivered between or in front of the oppositely placed disks 25, 25 is stirred together with soil. The ridging fertilizer applicator having the construction is provided with an interdisk diffusion means K for diffusing the powdery or granular agent in the lateral direction of the ridge formed by the ridge former 7 and between the pair of disks 25, 25, and the diffusion amount is set to be different in the lateral direction to achieve nearly uniform application of fertilizer or pesticide in the lateral direction between the disks 25, 25 even after soil covering treatment with the tilling tines.【課題】 部分耕耘施肥において、畝断面にほぼ均一に施用剤を散布しようとする。【解決手段】トラクタ車体１の後方に耕耘ロータリ６と耕耘土壌を受けて畝成形する畝成形器７を装着し、耕耘ロータリ６の耕耘軸１５には複数の耕耘爪２３，２３…と畝成形器７で成形する畝の畝幅間で対応する対のディスク２５，２５を配設し、この対向するディスク２５，２５間またはその前方において繰り出された粉・粒状施用剤を土壌と共に攪拌する畝立施肥装置において、前記畝成形器７による畝の幅方向であって前記対のディスク２５，２５間に粉粒状物を拡散するディスク間拡散手段Ｋを設け、該拡散散布量を当該幅方向において異なる量に設定することで、耕耘爪で土寄せされてもディスク２５，２５間幅方向においてほぼ均一に施肥又は施薬できる。【選択図】 図９
