Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements based » requirements a
based revision » base revision, based precision, based decision
array probing » arrays probing, assay probing, array profiling
array arcing » array forming, array sharing, array using
array string » array strong, arrays strings, array sharing

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "irrigation requirements based revision ((((array arcing) OR (array string))) OR (array probing))~".
• Adding a wildcard symbol may retrieve word variants: irrigation requirements based revision ((((array arcing) OR (array string))) OR (array probing))*.