"'Sow righteousness for yourselves, reap the fruit of unfailing love, and break up your unplowed ground; for it is time to seek the Lord, until he comes and showers his righteousness on you.'" NIV translation
Sowing righteousness speaks of repentance which is the seed of salvation. The "unfailing love" is the Hebrew word "hesed" which is hard to translate but roughly means "loyal love". This reminds Israel that God has chosen them and He is not changing His mind. He has not turned from them but they have turned from Him. They must realize that they are headed in the wrong direction and stop and turn around. This is the seed that will develop into a right relationship with a holy God. The same is true for people, today, in the fact that we must make a decision to turn to Christ and away from our ways. When we do, He showers us with His righteousness because of His "hesed".