in higher productivity technology , such as modern seeds and fertilizers 農家が投資することだけでなく 食料安全保障などにも
sake yeasts comprise foam-forming kyokai sake yeasts , which are high producers of foam , and non-forming kyokai sake yeasts , which are low producers of foam , the latter of which having a higher productivity . 清酒酵母には醸造中に協会系酵母泡あり酵母と呼ばれる大量の泡を発生させる協会系酵母泡あり酵母と、高泡を発生しない協会系酵母泡なし酵母とがあり、後者の方が生産性が高い。
aiming at solving the bamboo shortage , as well as pursuing higher productivity and lower cost by the introduction of machine-made method instead of hand-made method , uchiwa fan made of plastic materials instead of traditional bamboo was developed and became popular in the decade started from 1965 . 昭和40年代には、竹不足の解消、機械生産による手づくりをはるかに上回る生産性と低コストから、伝統的な竹に換わってポリピレン（プラスチック）を使用したポリ団扇が登場し、急速に普及していく。
