id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-72909	Helenius, Juha	Conventional and organic cropping systems at Suitia VI: Insect populations in barley	1990	7	.pdf	application/pdf	3523	260	59	There were no significant differences in aphid densities between the systems in con- ventional cropping, or between the systems in organic cropping. Observations on the number of cereal aphids on the soil in relation to aphid density in winter wheat.	cache/afs-72909.pdf	txt/afs-72909.txt