Do earthworms stimulate plant growth?
Subject search (Thesaurus): suggests broader, narrower terms and related terms. Terms used by the database.
“earthworms” + “plant growth”. Connect the terms with an "and" to find articles where both are mentioned.
Keyword search (Advanced mode): searches for your terms and suggests more terms to narrow your search down.
“earthworms” + “plant growth”
or use autofill “earthworms effect on plants”
Example of narrowing a broad topic:
"effect of earthworm activity on non-native plants"