id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71430	Hårdh, J. E.	On the calcium uptake of glasshouse cucumber	1957	5	.pdf	application/pdf	1821	100	61	The chemical nature of the crystals has not been determined, but they are taken to be calcium salts, as on many other plants. The upper leaves of older plants become pale green beginning with the leaf margins, which turn somewhat upwards.	cache/afs-71430.pdf	txt/afs-71430.txt