id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajoaa-637	Mazarura , U; Chisango , C	Effects of Long Term Cropping Systems on Soil Chemical Properties	2012	10	.pdf	application/pdf	4428	192	59	Available soil P was extracted using an anion-exchange resin method which utilizes Dowex 21K in the chloride form and involves leaching of phosphate with NaOH followed by HCl. After 9 years, tobacco-grass rotations showed higher soil C than monocropping, regardless of variety.	cache/ajoaa-637.pdf	txt/ajoaa-637.txt