myLogger.debug("daDt: " + daDt);
    private float calculateDaDt() {        float PPFFractionAbsorbedMax = 0.93f;        if (myTimeTillCanopyClosure <= 0)            return 0f;        float daDt = PPFFractionAbsorbedMax                * getN()                * MathUtils.pow((getDaysOfGrowth() / myTimeTillCanopyClosure),                        getN() - 1f) * (1f / myTimeTillCanopyClosure);        myLogger.debug("daDt: " + daDt);        return daDt;    }