Seed size of bottom pod is heavier than those of middle and top. Standard germination and AA test values are higher than those of top, the conductivity is lower than that of top.

底层粒重高于中层和顶层，且其发芽率和AA测试活力值均高于顶层，但其电导率值小于顶层。

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Andrew Howard, of the motoring organisation the AA, welcomed the measure as a "valuable test for the future of road safety".

BBC: Learner drivers face new test