However, direct contact of stones and clods with potatoes in the harvester causes considerable damage to potato tubers during mechanical harvesting (Yamada, 2007).Consequently, a soil mechanical conditioning (SMC) technique that removes the stones and clods from beds before sowing potato crops has been adopted in Hokkaido. This technique removes the stones and clods from the sowing beds, greatly decreasing the quantity of unwanted material lifted into the machine during harvesting. The result is a reduced
wide area centered in Fukushima prefecture, and causing a major impact on Japan's agriculture, forestry, and fishing industries. This marked the first time that Japan had experienced large-scale radioactive contamination of agricultural land, thus making restoration and reconstruction the largest and most pressing tasks following the nuclear accident. Various institutions have been earnestly
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