Kathuli, P.; Gachimbi, L.; Maingiand, S.; Thuranira, E. Suitability of Modified Dilute Double Acid ÐMehlich 1 (0.1NHCL + 0.025NH2SO4) and Olsen (0.5MNaHCO3PH 8.5) Methods for Testing of Available Phosphorous for Kenyan Soils. Disc Innov 2009, 19.