id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71651	Kaila, Armi	Fixed ammonium in some Finnish soils	1966	10	.pdf	application/pdf	4968	241	67	Soil samples. In this relatively hete- rogeneous material consisting of 44 samples from the surface layer down to 20 cm and 86 samples from the deeper layers, the pH values ranged from 3.3 to 7.5, the contents of clay from 0 to 96 per cent, organic C from 0.03 to 6.6 per cent, and Kjeldahl-N from 0.13 to 4.53 mg/g. In the 46 finesand, loam and silt soil samples, the content of nonexchangeable NH 4-N was, on the average, 90 +3O ppm ranging from oto 190 ppm.	cache/afs-71651.pdf	txt/afs-71651.txt