id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
geusb-4772	Kalvig, Per; Fold, Niels; Jønsson, Jesper Bosse; Elisaimon Mshiu, Elisante 	Rock phosphate and lime for small-scale farming in Tanzania, East Africa	2012	4	.pdf	application/pdf	2603	156	61	They comprise organic fertilisers such as manure, leaf litter and sludge, and rock fertilisers such as marl, rock phosphate, volcanic rock and mica. The Songwe valley area holds two potential sources for the pro- duction of local rock phosphate: carbonatite and apatite-rich residuals of carbonatite.	cache/geusb-4772.pdf	txt/geusb-4772.txt