He makes the grass grow for the livestock and provides crops for man to cultivate, bringing forth food from the earth:
PSALM 104 This psalm differs from the preceding, inasmuch as it neither treats of the special benefits which God bestows upon his Church, nor lifts us up to the hope of the heavenly life, but by presenting to us a lively image of his wisdom, power, and goodness in the creation of the world, and in the order of nature, encourages us to praise him...
Commenting on Psalm 104:1-35
He causeth the grass to grow for the cattle, and herb for the service of man. Grass grows as well as herbs, for cattle must be fed as well as men. God appoints to the lowliest creature its portion and takes care that it has it: Divine power is as truly and as worthily put forth in the feeding of beasts as in the nurturing...
Having given glory to God as the powerful protector of this earth, in saving it from being deluged, here he comes to acknowledge him as its bountiful benefactor, who provides conveniences for all the creatures. I. He provides fresh water for their drink: He sends the springs into the valleys, Psa 104:10.
Commenting on Psalm 104:10-18