Perhaps you should try some spelling variations:
"supply furrow irrigation schemes." » "supply furrow irrigation scheme.", "supply furrow irrigation systems.", "supply farm irrigation schemes.", "supply crop irrigation schemes.", "supply flood irrigation schemes."
"supply large irrigation schemes." » "supply large irrigation scheme.", "supply large irrigation systems.", "supply farm irrigation schemes.", "supply drip irrigation schemes.", "supply scale irrigation schemes.", "supply charges irrigation schemes.", "supply market irrigation schemes.", "supply curve irrigation schemes."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply furrow irrigation schemes.") or ("supply large irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply furrow irrigation schemes.") OR ("supply large irrigation schemes.")).
• Removing quotes may allow a broader search: (( supply furrow irrigation schemes. ) or ( supply large irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply furrow irrigation schemes.") or ("supply large irrigation schemes."))*.