21. Inventories

RUB million	2011	2010
Raw materials and spare parts	5,983	4,344
Fertilizers	2,795	2,645
Apatit rock	775	293
Apatit concentrate	463	374
Work-in-progress	345	329
Provision for obsolescence	(265)	(269)
	10,096	7,716

Finished goods with the carrying value of RUB 49 million (31 December 2010: RUB 36 million) are pledged to secure bank loans, see note 26.

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