For simplification of dealings in the central wholesale markets and reduction ofexpenditures in the marketing systems, the standards of shipment are provided for almost all agricultural products as general commodities. In addition to harvesting, the farmers must sort and pack the agricultural products in accordance with the standards of shipment. This has resulted in an increase in the farmers' workloads.
Therefore we investigated the workloads of strawberry-growing farmers during sorting and packing strawberries.
According to the sandard of shipment, strawberries are graded into three categories by quality, six categories by size and three categories by weight, and that combination is very complicated. The farmers spend much time sorting and packing strawberries. Particularly in February and March when strawberries of all sizes are shipped, sorting and packing occupy more than60% of all working hours. The smaller in size the strawberries become, the more time the farmers spend on sorting and packing a pack. We investigated the farmers' work postures, Critical Flicker Fusion Frequency (CFF) and heart rate during work. The results of the investigation showed that sortingand packing strawberries constituted hard physical and mental labour because of the complicated standards. Inquiries regarding awareness of the standards of shipment revealed that 84.3% of the strawberry growing farmers recognized the necessity of the standard of shipment. But 64% of them hoped to make the standards simpler. Simplication of the standards of shipment might reduce farmers' workloads and moreover give consumers benefit.

In order to find some countermeasures to relieve the workload upon the lower back due to harvesting and sorting strawberries, prevalence of localized fatigue complaints and flexibility of spine of strawberry farmers were compared with eggplant farmers. Furthermore time study, global EMG and biomechanical analysis of body postures during harvesting strawberries and so forth were performed. Obtained results are as follows:
1) As for the localized fatigue complaints during the one month soon after harvesting season, prevalence of the lower back pain was 58.1% in men and 82.5% in women. As to the body part where fatigue feeling appears during harvesting strawberries, most of the farmers pointed out the lower back.
2) Flexibility of the spine was disturbed in some degree compared with the eggplant farmers.
3) The specific stooping posture with the left forearm supported by the left thigh just above the knee was sometimes observed and was suspected to relieve the load upon the lower back. This posture was proved to decrease the moment upon the lower back, to straighten the unnatural curvature of thoracolumbar spine, and relieve the muscle tension of legs.
4) Too short leisure season in the strawberry cultivation and too short sleeping hours due to long working hours during harvesting season were considered to accelarate the accumulative localized fatigue in the lower back.

Environmental contamination caused by the organochlorine pesticides (OCPs), such as BHC and DDT, as well as polychlorinated biphenyls (PCBs), is an important problem because of their accumulation in human bodies due to their high lipophilic properties and high chemical stability. In this study, we have investigated the actual condition of the BHC, DDT and PCB levels in the plasma of farmers in the three districts of Japan and in China. At the time of the blood sampling, about 10years had passed since the use of OCPs was forbidden in Japan, whereas OCPs were being used in China.
The blood samples were collected from following 4 districts:(a) Northern Kyushu (N =67), (b) Tomishiro in Okinawa prefecture (N=24), (c) Yokote in Akita prefecture (N = 36) and (d) Harbin in China (N =21).
The results are as follows:
1) β-BHC was detected in all of the 148 plasma samples with the range of 0.9-48.4 ppb. Percentage of the samples with the β-BHC level higher than 20 ppb was 2%(3 samples) for the Japanese and 57%(12 samples) for the Chinese.
2) p, p'-DDT and p, p'-DDE were detected in all samples and total-DDT was ranged from 2.4 to 49.9 ppb. Percentage of the samples with the total-DDT level higher than 20 ppb was 43%(9 samples) for the Chinese and 8%(10 samples) for the Japanese. DDT level of Chinese was significantly higher than those of farmers in Northern Kyushu and Yokote.
3) PCBs were detected in all of the Japanese samples (n=127) with the range of 1.1-22.8 ppb. Whereas the PCB level of 15 samples of Chinese women was less than 1.0 ppb and that of other 4 samples of Chinese men was higher than 10 ppb.
From these results, regional difference in the residue of OCPs and PCBs in Japanese was discussed, besides the difference in that of OCPs beteween Japanese and Chinese was discussed in relation to the history of the use of OCPs.