Note 4: Inventories At September 30, 2011 and December 31, 2010, inventory reserves for certain slow-moving inventory items (Climate Control products) were $1,984,000 and $1,616,000, respectively. In addition, because cost exceeded the net realizable value, inventory reserves for certain nitrogen-based inventories provided by our Chemical Business were $1,075,000 and $177,000 at September 30, 2011 and December 31, 2010, respectively.

Changes in our inventory reserves are as follows:


	Nine Months Ended						Three Months Ended
	September 30,						September 30,
	2011			2010			2011			2010
	(In Thousands)
Balance at beginning of period	$	1,793		$	1,676		$	1,988		$	1,302
Provisions for (realization of) losses		1,351			(87	)		1,072			237
Write-offs and disposals		(85	)		(54	)		(1	)		(4	)

Balance at end of period	$	3,059		$	1,535		$	3,059		$	1,535

The provisions for (realization of) losses are included in cost of sales in the accompanying condensed consolidated statements of income.