id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71572	Kaila, Armi	Fixation of ammonium in Finnish soils	1962	8	.pdf	application/pdf	3599	194	62	The content of exchangeable potassium varies in the surface soil samples quite markedly, prob- ably owing to the fertilization; yet, the mean value is not far higher than the cor- responding figure for the deeper layers. Ammonium fixation in soils.	cache/afs-71572.pdf	txt/afs-71572.txt