Similar soils include Eckrant , Purves , Stephen and Tarrant series. Harper soils are dry in some part of the moisture control section for more than 90 cumulative days in most years. Eckrant and Tarrant soils have over 35 percent coarse fragments in the control section, and in addition Tarrant soils have a calcic horizon. Purves soils have a calcic horizon and are calcareous throughout. Stephen soils have mixed mineralogy and are underlain by a paralithic contact of chalky limestone.
Oglesby soils are on nearly level or gently sloping uplands.
Surfaces are typically plane to slightly benched with slopes of 0 to 3 percent. Oglesby soils formed mainly in the Kiamichi Clay and Edwards Limestone undivided formations of the Lower Cretaceous Period. Mean annual precipitation ranges from 26 to 34 inches. The mean annual temperature is 64 to 68 degrees F. Frost free days range from 220 to 260 days and elevation ranges from 850 to 1250 feet. Thornthwaite P-E indices range from 44 to 56.