PROBLEM TO BE SOLVED: To perform soil covering in an appropriate amount according to hardness/softness of a field in a case of high speed travel.SOLUTION: A work vehicle includes: a travel vehicle body 2； a seeder 82； a seeding soil covering member 59 supported so as to change soil covering posture for covering a seed supplied to a field by the seeder 82 with soil； a hardness/softness detection body 203b contacting a field and moving according to hardness/softness of a field； a soil covering drive source 66 changing soil covering posture of the seeding soil covering member 59； a speed detection member SN1； and soil covering control means CA3 controlling the soil covering drive source 66 by correcting at least one of a movement amount L of the hardness/softness detection body 203b and threshold λ1, λ2, λ3 discriminating hardness/softness of the field based on the movement amount L when a travel speed V is high.SELECTED DRAWING: Figure 8【課題】走行速度が高速な場合に、圃場の硬軟に応じて適切な量の覆土をすること。【解決手段】 走行車体（２）と、播種装置（８２）と、播種装置（８２）が圃場に供給した種子を覆土する覆土姿勢を変更可能に支持された播種覆土部材（５９）と、圃場に接触して圃場の硬軟に応じて移動する硬軟検知体（２０３ｂ）と、播種覆土部材（５９）の覆土姿勢を変更する覆土駆動源（６６）と、速度検出部材（ＳＮ１）と、前記走行速度（Ｖ）が高速の場合には、硬軟検知体（２０３ｂ）の移動量（Ｌ）と前記移動量（Ｌ）に基づいて圃場の硬軟を判別する閾値（λ１, λ２, λ３）との少なくとも一方を補正して覆土駆動源（６６）を制御する覆土制御手段（ＣＡ３）と、を備えた作業車両。【選択図】図８
