id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-72352	Hartikainen, Helinä	Effect of cumulative fertilizer dressings on the phosphorus status of mineral soils I Changes in inorganic phosphorus fractions	1989	5	.pdf	application/pdf	2463	145	68	P fractions in experimental soils (kg ha-1 ) and the changes in them during seven years of cul- tivation. H 2 S04 -soluble P decreased in seven soils by 16—34 kg ha -1 .	cache/afs-72352.pdf	txt/afs-72352.txt