Possible Clues:

• Science of soil management and crop production
• Study of crops and soil management
• Rural economy
• Science of land management and crop production
• Such a cultivated study is enough to make one groan ''Goodness me!''
• Rural science
• It may make one a producer, but with a groan - Oh, dear!
• This study might make one groan ` `Dear me!' '
• The makings of a groan - goodness me, what a cultivated study!
• The science of crop production