code: public static String calcNormalDensity(String slsnd, String slcly, String omPct) {
  
          String satMt = calcSaturatedMoisture(slsnd, slcly, omPct);
          String ret = product(substract("100", satMt), "0.0265");
          LOG.debug("Calculate result for Normal density, g/cm-3 is {}", ret);
  
          return ret;
      }
docs: Equation 6 for calculating Normal density, g/cm-3
  
  @param slsnd Sand weight percentage by layer ([0,100]%)
  @param slcly Clay weight percentage by layer ([0,100]%)
  @param omPct Organic matter weight percentage by layer ([0,100]%), (=
  SLOC * 1.72)