Della’s nails always had earth under them. Despite the bonnets and sleeves she wore, her skin would never be as milky-white as fashions required, as the folks in town would desire.
She surveyed the plains, ready for tilling and fertilizer. Her horses swished their tails, her husband stood behind the plow. In one hand she held the reins to another horse that pulled a wagon laden with manure, and with the other she held a pitchfork ready to toss the fertilizer onto the ground.
This smelly job would enrich the earth and keep the farm running, her family fed.
***
This was written for the January 10th Carrot Ranch Challenge, Enrich. My teeth are doing well, I think, so the alarm is over!
Let Me Tell You the Story of... 
The use of ‘earth’ rather than dirt in your first sentence makes this story so much more intimate that I think it would have been otherwise. Great choice!
My brother once had a science teacher who would accept answers with the wird ‘soil’ but not ‘dirt.’ Ever since then I’ve been hyper aware of the connotations between all those ground-worthy synonyms.
Yikes.
A worthy sacrifice for enriching the family and your character recognizes the worth.
A great idea for the prompt. Well done.
Thanks!