The meaning of this passage is:

If the military corvee does not interfere with the season of agricultural production, the grain will be inexhaustible; Fine nets don't go to deep ponds for fishing, and fish and turtles eat more; If you chop down trees in the mountains with an axe according to the season, there will be endless wood. Food, fish and turtles can't be eaten up, and wood can't be used up, so people bury them without regrets.

The article expresses Mencius' thought of "benevolent government"