Serengeti over 80 percent of the Serengeti. The southeastern area lies in the rain shadow of the Ngorongoro Conservation Area's highlands and is composed of shortgrass treeless plains with abundant small dicots. Soils are high in nutrients, overlying a shallow calcareous hardpan due to natrocarbonatite eruptions from Ol Doinyo Lengai. A gradient of soil depth northwestward across the plains results in changes in the herbaceous community and taller grass. About west, acacia woodlands appear suddenly and stretch west to Lake Victoria and north to the Loita Plains, north of the Maasai Mara National Reserve. The sixteen acacia species vary over this
Kenya Police Reserve service in the Auxiliary police, supporting the regular Kenya Police. (The Kenya Police were at this time under pressure from war-time commitments). The Auxiliary Police regulations lasted from January 1945 until February 1947, after which they were repealed. It was found, however, that the Kenya Police were still short of personnel, and in February 1947 it was agreed that 255 former Auxiliary Police would be retained on a voluntary basis, but would be known as Special Police, their basis in law being section 70 of the Kenya Police Ordinance which made provision for what in the UK would be called