public void updateTick(World world, int i, int j, int k, Random random)
    {
        super.updateTick(world, i, j, k, random);
        if(world.getBlockLightValue(i, j + 1, k) >= 9)
        {
            int l = world.getBlockMetadata(i, j, k);
            if(l < 4)
            {
                float f = getGrowthRate(world, i, j, k);
                if(random.nextInt((int)(100F / f)) == 0)
                {
                    l++;
                    world.setBlockMetadataWithNotify(i, j, k, l + 1);
                }
            }
        }
    }