Matches in Library of Congress for { ?s ?p Crops and nitrogen.. }
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- 2002494562 subject "Crops and nitrogen.".
- 2005033752 subject "Crops and nitrogen.".
- 2008019573 subject "Crops and nitrogen.".
- 2009907452 subject "Crops and nitrogen.".
- 88021878 subject "Crops and nitrogen.".
- 93037138 subject "Crops and nitrogen.".
- 96052379 subject "Crops and nitrogen.".
- 96901116 subject "Crops and nitrogen.".