(i) R = 9.28 * P – 8838. Mean annual erosivity (KE > 25) where P is mean annual
precipitation [Morgan (1974) cited in Morgan (1994)]
(ii) R = 0.276 * P * I30. Mean annual EI30, where P is mean annual precipitation [Foster
et.al (1981) cited in Morgan (1994)]
(iii) R = 0.5 * P (in US unit) and R = 0.5 * P *1.73 (in Metric unit). [Roose (1975) cited
in Morgan (1994)]