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	1.	Development of a soil-plant phosphorus simulation model for calcareous and weathered tropical soils by Daroub, S.H Gerakis, A Ritchie, J.T Friesen, D Ryan, J Material type: Article; Format: print Language: English Publication details: Barking, Essex (United Kingdom) : Elsevier, 2003 In: Agricultural Systems v. 76, p. 1157-1181632251 Online resources: Access only for CIMMYT Staff Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: CIS-3708. Place hold Log in to add tags Add to cart (remove)
	2.	Agriculture in Central Asia : Research for development by Ryan, J [editor] Vlek, P.L.G [editor] Paroda, R.S [editor] Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Aleppo, (Syria) : ICARDA, 2004 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 333.7258 RYA. Place hold Log in to add tags Add to cart (remove)

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