1.1 This guide covers techniques that are appropriate for the construction of athletic field rootzones using native-soil. This guide is also applicable to soils which are not native to the site but are natural (non-sand) imported soils. This guide provides guidance for the selection of soil materials, amendments, and methods for use in constructing these types of athletic field rootzones. Soils having a texture of Sandy Loam or coarser should be utilized for soil-based rootzone construction. Soils which are finer textured than listed above may be employed for rootzone construction but should be sand-modified to meet the performance criteria of this standard. If fields are constructed with soils which are finer textured, they will not be capable of meeting the performance criteria in this standard. Despite performance limitations, fields which are constructed with finer textured soils (due to logistics or budget constraints) may still be able to conform to the slope/grade criteria (see 5.1, 5.4, and Table 1). Sand modified rootzone constructions are not addressed by this standard.