You can find scholarly research by searching a large multidisciplinary databases or by a searching smaller, agricultural database. There are advantages to each database. There may be significant, but not complete, overlap in coverage within these databases.
Best Databases for Finding Agricultural Science Research
If you are interested in seeing a full list of agricultural databases available at WSU check out this link.
If you want to see all of the databases available, across disciplines, check out this link.
Searching within Specific Scholarly Journals
Within those larger databases listed above, you can also search within specific scholarly journals. Below are two fantastic horticulture scholarly journals (amongst many):
You can search within these journals by either entering keywords within the "Search for articles within this journal" box or by clicking the link under "Access Options" (which will take you to the publisher's website).