This statement can be interpreted variously. It probably means that some people make contributions that enrich our lives, and other people only enrich the ground they are buried in.
earthworms
snail enriches the soil by its waste(poo)
Farming involves providing for the people on earth, but you already knew that. most farmers use pesticides, which could cause pollution, but they also enrich the soil by planting crops and letting what they dont harvest decay and turn into humus. So, when you think about it, farming has a lot to do with the earth.
The farmland was replowed to enrich the soil.
fertilizer
Yes it can, a decaying body is essentially fertilizer and nourishment for the soil.
jabalaba
root nodules
Soil is important to earth soil is needed of all people in the world
Flooded.
soil
To make rich with any kind of wealth; to render opulent; to increase the possessions of; as, to enrich the understanding with knowledge., To supply with ornament; to adorn; as, to enrich a ceiling by frescoes., To make rich with manure; to fertilize; -- said of the soil; as, to enrich land by irrigation., To supply with knowledge; to instruct; to store; -- said of the mind.