code: public static String calcSatBulk(String slsnd, String slcly, String omPct, String slcf) {
  
          String satMatric = calcSatMatric(slsnd, slcly, omPct);
          String slbdm = calcNormalDensity(slsnd, slcly, omPct);
          String alpha = divide(slbdm, "2.65");
          String ratio = divide(substract("1", slcf), substract("1", slcf, product("-1.5", slcf, alpha)));
          String ret = product(satMatric, ratio);
          LOG.debug("Calculate result for Saturated conductivity (bulk soil), mm/h is {}", ret);
  
          return ret;
      }
docs: Equation 22 for calculating Saturated conductivity (bulk soil), mm/h
  
  @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)
  @param slcf Grave weight fraction by layer (g/g)