单产

单产	dān chǎn	yield per unit area
单	Shàn	surname Shan
单	chán	used in 单于
单	dān	bill / list / form / single / only / sole / odd number / CL:个
产	chǎn	to give birth / to reproduce / to produce / product / resource / estate / property
产	chǎn	variant of 产