PROBLEM TO BE SOLVED: To provide a field work system capable of calculating an accurate slip ratio in consideration of various fluctuation factors with a simple configuration. SOLUTION: This is a field work system in which a transplanting machine 1 having a seedling planting device 3 is run while executing work in a field, and the plowing board depth D at a position of the transplanting machine 1 is detected. The slip rate calculation unit 62 that calculates the slip ratio S of the transplant machine 1 based on the detection unit 61, the plowing board depth D, and the moving speed of the transplant machine 1, and the seedling planting based on the slip rate S. A work control unit 63 that controls the operation of the device 3 is provided. [Selection diagram] Fig. 3【課題】簡素な構成にて種々の変動要因を考慮した正確なスリップ率を算出することができる圃場作業システムを提供する。【解決手段】苗植付装置３を有する移植機１を圃場において作業を実行させながら走行させる圃場作業システムであって、移植機１の位置での耕盤深さＤを検出する耕盤深さ検出部６１と、耕盤深さＤと、移植機１の移動速度と、に基づいて、移植機１のスリップ率Ｓを演算するスリップ率演算部６２と、スリップ率Ｓに基づいて苗植付装置３の動作を制御する作業制御部６３と、を備える。【選択図】図３
