Humus
Definition
Noun
Rich, dark organic matter formed by decay of vegetable matter, essential to soil's fertility
Synonym
fertilizer
leaf mold
soil conditioner
Antonyms
unfertilized soil
live leaves
no nutrients
Sentences
The farmer added humus to the soil so there would be more nutrients to help the plants grow.
The gardener added grass clippings to the humus so it would increase the soils fertility even more.