cients. Normalizing to a unit plot of length 22.13 m, both the USLE and RUSLE use the equation Empirical soil erosion models continue to play an important role in soil conservation planning and environmental evaluations around L 5 (l/22.13) [2] the world. The effect of hillslope length on soil loss, often termed the where L is soil loss normalized to the 22.13-m-long slope length factor, is one...

For any [Formula: see text], we construct genus-[Formula: text] Lefschetz fibrations over the two-sphere whose slopes are arbitrarily close to text]. The total spaces of can be chosen minimal and simply connected. It is also shown that infimum supremum all not realized as slopes.