There is a great diversity of manner in agricultural daily work compared to other industrial works. Therefore, at the estimation and comparison of farmers' subjective symptoms caused by the work, it should be known the relative grade of the work load of the day compared to those of other working days.
From this viewpoint, in this study, seventy three farmers who had been surveyed the subjective symptoms after daily work 10-16 months before were shown the working record of the day and were made to recall and estimate the grade of the work load and fatigue at that time by five steps rating method. The obtained data were referred to their fatigue symptoms.

Health problems of the farmers were surveyed in two districts where progressed mechanization, green hause culture or other improved management systems were introduced.
The following results were obtained:
1. Long daily working hours remain as before, therefore, sleeping hours and hausehold hours in female are shortened in busy seasons.
2. By introduction of joint management or cooperative manegement working hours of female farmers were shortened in some cases, but not enough.
3. New health hazards as noise, vibration, toxic chemicals, continuing of forced posture, forced repetitive motion of hands and arms are being marked.
4. High incidence of subjective symptoms relating to their acute or chronic fatigue were obserbed in most type of agriculture, which were considered to indicate that modernization of agricultural production had been promoted in lacking of consideration for farmer's health.