calcium

• Pyroxenes and amphiboles also contain calcium .
  辉石与闪石也含有钙。
• Strongly acid peat soils are often low in calcium .
  强酸性泥炭土常呈现低钙。
• Limestone is rock composed of calcium carbonate .
  石灰石是由碳酸钙所构成的岩石。
• They are alumino-silicates of sodium, potassium and calcium .
  它们都是钾和钙的铝硅酸盐类。
• Additions of organic matter to soil hasten calcium losses .
  土壤增施有机质会促进钙的损失。
• They may be exacerbated by a simultaneous deficiency of calcium .
  由于同时缺乏钙而使之恶化。
• At high calcium concentration they fuse without lysis .
  在钙离子浓度高时，他们融合而不解体。
• Thus there is a greater calcium need to immobilize the oxalate .
  因而需要较大量钙去固定草酸。
• Calcium cyanamide is poisonous and irritating to the skin .
  氰氨化钙是毒性物质，对皮肤有刺激性。
• It was found that calcium reduced elongation of cucumber hypocotyls .
  有人发现，钙能抑制黄瓜胚轴的伸长。