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Soil Survey Manual - Table 3-6

Illustrative water-state annual pattern

Average - 6 years in 10
Depth (cm) :Jan :Feb :Mar :Apr :May :Jun :Jul :Aug :Sep :Oct :Nov :Dec
Fine, montmorillonitic, mesic Typic Argiudoll a
0 - 25 :MM :MM :MM :MM :MM :MM :MS :DS :DS :MS :MM :MM
  :F :F : : : : : : : : : :F
25 - 50 :MM :MM :MM :MM :MM :MM :MM :MS :MS :MS :MS :MM
  :F :F :F : : : : : : : : :
50 - 100 :MS :MS :MM :MM :MM :MM :MS :MS :MS :MS :MS :MS
100 - 150 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
150 - 200 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
Fine-loamy, mixed, thermic Typic Haploxeralf b
0 - 30 :MM :MS :MS :DS :DS :D1 c :D1 :D1 :D1 :D1 :D1 :MS
30 - 70 :MM :MM :MM :MM :MS :DS :D1 :D1 :D1 :DS :MS :MM
70 - 100 :MV :MV :MM :MM :MM :MM :MS :D1 :D1 :D1 :D1 :MS
120 - 170 :MM :MM :MM :MS :MS :MS :MS :D1 :D1 :D1 :DS :MS
Driest 2 years in 10
Depth (cm) :Jan :Feb :Mar :Apr :May :Jun :Jul :Aug :Sep :Oct :Nov :Dec
Fine, montmorillonitic, mesic Typic Argiudoll a
0 - 25 :MM :MM :MM :MM :MM :MS :DS :DS :DS :MS :MS :MM
  :F :F : : : : : : : : : :F
25 - 50 :MS :MS :MS :MS :MS :MS :MS :MS :MS :MS :MS :MS
  :F :F :F : : : : : : : : :
50 - 100 :MS :MS :MS :MM :MM :MS :MS :MS :MS :MS :MS :MS
100 - 150 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
150 - 200 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
Fine-loamy, mixed, thermic Typic Haploxeralf b
0 - 30 :MS :MM :MS :MS :DS :DS :D1 :D1 :D1 :D1 :D1 :DS
30 - 70 :MM :MM :MM :MM :MS :DS :D1 :D1 :D1 :D1 :MS :MS
70 - 100 :MS :MM :MM :MM :MM :MM :MS :D1 :D1 :D1 :D1 :DS
120 - 170 :MS :MM :MS :MS :MS :MS :MS :D1 :D1 :D1 :D1 :D1
Wettest 2 years in 10
Depth (cm) :Jan :Feb :Mar :Apr :May :Jun :Jul :Aug :Sep :Oct :Nov :Dec
Fine, montmorillonitic, mesic Typic Argiudoll a
0 - 25 :MM :MM :MV :MV :MV :MM :MM :MM :MM :MM :MM :MM
  :F :F : : : : : : : : : :F
25 - 50 :MM :MM :MV :MV :MM :MM :MM :MM :MM :MM :MM :MM
  :F :F :F : : : : : : : : :
50 - 100 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
100 - 150 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
150 - 200 :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM :MM
Fine-loamy, mixed, thermic Typic Haploxeralf b
0 - 30 :MM :MM :MM :MS :DS :DS :D1 :D1 :D1 :DS :MS :MM
30 - 70 :MV :MV :MM :MM :MS :DS :D1 :D1 :D1 :DS :MM  
70 - 100 :MV :MV :MM :MM :MM :MM :MS :D1 :D1 :D1 :MS :MM
120 - 170 :MM :MM :MS :MS :MS :MS :MS :D1 :D1 :D1 :DS :MS
a. Otoe County, Nebraska (Sautter, 1982). Sharpsburg silty clay loam, 2-5 percent slopes. Corn (Zea mays) following corn. Assume: contoured, terraced, over 20 percent residue cover. Disk twice in April. Field cultivate once. Plant May 1-15. Cultivate once or twice. Harvest November 1-15. Cattle graze after harvest. Based on a discussion with H.E. Sautter, soil scientist (retired), Syracuse, Nebraska. Monthly water states based on long-term field mapping experience and water balance computations. The Sharpsburg soil series pertains to the map unit illustrative of a consociation (appendix).

b. San Diego Area, California (Bowman, 1973). Mean annual precipitation at Escondido is 344 mm and at Thornwaite potential evaporation is 840 mm. Study area in Fallbrook sandy loam, 5 to 9 percent slopes, eroded. The study area has slightly greater slope than the upper limit of the map unit. Vegetation is annual range, fair condition. Generalizations were made originally for the 1983 National Soil Survey Conference based on field measurements in 1966 by Nettleton et al (1968), as interpreted by R.A. Dierking, soil correlator, Portland, Oregon. At the time, moderately dry and very dry were not distinguished.

c. D1 = DV + DM.