fine grain soil and sandとは 意味・読み方・使い方

To provide a short-neck clam-growing soil suitable as growing soil for the short-neck clam, easily prepared based on mountain sand which can be generally collected, by blending both of a fine grain component (based on the Japanese unified soil classification standards, including silt and clay, hereafter the component is based on the same standards), and coarse sands.例文帳に追加

一般的に採取される山砂を基に容易に調整することができ、細粒分（シルト及び粘度を含む日本統一土質分類基準による。以下同基準による）、粗砂の両者を勘案してアサリの育成土として好適なアサリ育成土を提供する。 - 特許庁