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6 levels of Soil Taxonomy - Coggle Diagram

- - - - This is based on the presence of other diagnostic horizons beyond those required at high levels.
      - Sub-Group
        
        Family
        
        This lists the important physical and chemical properties that effect the soil's use and management. This includes the particle size, mineralogy, CEC, and soil temperature.
        
        Series
        
        This is the most defined classification level or soil individual, all members of the series have similar parent material, horizons, depth, and overall morphology
        
        If the soil is not seen as a typic (normal for the given soil order) due to a major property that affects its use or shows a relation wit some other higher classification.
- - - - Soil type has a low base saturation
      - Oxyaquic
        
        Fine, smectitic, hyperthermic
        
        China Series
        
        Location/province
        
        Southeast Texas, east of the Trinity River
        
        Horizons that are commonly seen: Ap- Commonly 10YR 3/1 (plowed) clay based. Dry moderate fine angular blocky structure, very acidic, clear boundary, and extremely hard and firm. Bw- 10YR 3/1 (weakly developed) fine angular blocky structure, common to see iron accumulation very acidic, commonly seen with a gradual wavy boundary. Bss1- 10YR 3/1 clay (slickenside) fine angular blocky structure, extremely hard and firm, few distinct slickensides, very acidic, gradual wave boundary. Bssy1- 10YR 4/1 (slickenside and accumulation of gypsum) coarse prismatic structure to fine angular blocky, extremely hard and firm, commonly seen fine accumulation of iron seen as (10YR 5/8 & 5YR 4/6) prominent pressure surfaces, prominent slickensides 5-20% gypsum accumulation very acidic clear wavy boundary. Bssg- 10YR 6/1 (slickensides and strong gleying) coarse prismatic to strong fine angular blocky, extremely hard and firm, common fine-med prominent dark red (2.5 YR 3/6) w/ sharp boundary matrix, (2.5Y 7/6) iron accumulation with diffuse boundaries in matric, pressure faces, prominent slickensides, strongly acidic
        
        The soil is fine textured with the mineralogy mostly consisting of smectite. The area is considered hyperthermic meaning the mean annual temperature is normally >22 degrees C and is in a warmer climate.
        
        This soil has a seasonal/permanent water table that the major part of the subsoil is whole colored
- - - - Old development of soil
      - Typic
        
        This states that these properties are typical for the mollisol series
        
        Fine, Smectitic, thermic
        
        The grain texture is on the fine side with the mineralogy mostly consisting of the mineral smectite and the area is seen as thermic for the soil temperature regime with a mean annual temperature 15-22 degrees C
        
        San Ysidro Series
        
        Location/province
        
        This series is found Southwest Sacramento Valley, northwest San Joaquin Valley, and valleys in the Coast Range of central California. Found to be moderately extensive to the area.
        
        Common horizons seen: Ap- (plowing) 10YR 6/2 fine sandy loam, while (10YR 4/3) moist, has a few mottles (10YR 6/6) massive hard friable , slightly plastic, very fine tubular pores, pH 6.0, smooth boundary. A- 10YR 6/2 fine sandy loam, moist (10YR 3/3) distinct mottles of (10YR 6/6) massive, hard, and friable, slightly plastic, very fine, very fine tubular pores, pH 6.0 abrupt smooth boundary. Bt1- (accumulation of silicate clays) 10YR 5/6 sandy clay loan moist (10YR 4/4) with brown (7.5YR 4/4) coatings moist. strong medium prismatic structure, very hard and firm, sticky and plastic, moderately thick clay films on face of peds and lining pores, will see fine Mn and Fe concretions, pH 7.0, and gradual smooth boundary. Bt3- (accumulation of silicate clays) 10YR 5/4 light sandy clay loam (moist- 10YR 4/4) medium prismatic structure, extremely hard, firm, sticky and plastic, very fine tubular pores, thick clay films on face of peds and lining pores, common Fe and Mn concretions, pH 7.0 gradual wavy boundary. Bt4- (accumulation of clay silicates) 10YR 6/4 light clay loam (moist 10YR 4/4 with 7.5YR 4/4 coatings) strong medium prismatic structure, hard, firm sticky and plastic, very fine tubular pores, continuous moderately thick clay films on face of peds and lining of pores, pH 8.0