id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71958	Tähtinen, Hilkka	Nitrogen and potassium fertilization of potato 	1978	11	.pdf	application/pdf	4808	334	65	In the present trials there was no correlation between the yield increase obtained with various nitrogen rates (50—156 kg/ha N) or various potassium rates (42 179 kg/ha K) and the results of the soil tests. An increase in the rate of nitrogen fertilization increased the fraction of 55 mm (and bigger) tubers and decreased the fraction of small (below 40 mm) tubers in the whole crop.	cache/afs-71958.pdf	txt/afs-71958.txt