Soil Properties

About This App

This interactive map allows you to explore a variety of soil properties throughout the continental United States. The data shown here were obtained by aggregating current USDA-NCSS soil survey data (SSURGO back-filled with STATSGO where SSURGO is not available) within 800m grid cells. This data aggregation technique results in maps that may not match the original data at any given point, and is intended to depict regional trends in soil properties at the statewide scale.

The source grids used to create the maps for each of these properties are available on the Download Page.

Using the App:

• Select a property from one of the four categories on the Properties tab.
• Click the ? icon next to the currently active property to learn about the property and its data aggregation.
• Click the map to view specific values at that location.
• Adjust the map layer transparency by using the slider bar at the top left of the map pane.
• Use the Location tab to zoom to specific areas of interest.
• Right click (long press on mobile) the map to create a web link that bookmarks the current property and map location.
• Tap the 'B' key to copy the current map viewport bounds to the clipboard.

This app was developed by the California Soil Resource Lab at UC Davis and UC-ANR in collaboration with the USDA Natural Resources Conservation Service. Please use the following citation for this website and gridded data products:

Walkinshaw, Mike, A.T. O'Geen, D.E. Beaudette. "Soil Properties." California Soil Resource Lab, 1 Oct. 2023, casoilresource.lawr.ucdavis.edu/soil-properties/.

Select a Property:Clear Map

• ▼▲  Chemical

  Calcium Carbonate?

  	CaCO3 (kg/m²)
  	< 5
  	5 - 25
  	25 - 75
  	75 - 150
  	150 - 225
  	225 - 300
  	> 300

  Cation Exchange Capacity?

  	CEC (cmol(+)/kg)
  	< 5
  	5 - 10
  	10 - 15
  	15 - 20
  	20 - 40
  	> 40

  Cation Exchange Cap. (0 - 5 cm)?

  	CEC (cmol(+)/kg)
  	< 5
  	5 - 10
  	10 - 15
  	15 - 20
  	20 - 40
  	> 40

  Cation Exchange Cap. (0 - 25 cm)?

  	CEC (cmol(+)/kg)
  	< 5
  	5 - 10
  	10 - 15
  	15 - 20
  	20 - 40
  	> 40

  Cation Exchange Cap. (0 - 50 cm)?

  	CEC (cmol(+)/kg)
  	< 5
  	5 - 10
  	10 - 15
  	15 - 20
  	20 - 40
  	> 40

  Electrical Conductivity?

  	Salinity Class	EC (dS/m)
  	Nonsaline	< 0.25
  	Nonsaline	0.25 - 1
  	Nonsaline	1 - 2
  	Very Slightly Saline	2 - 4
  	Slightly Saline	4 - 8
  	Moderately Saline	8 - 16
  	Strongly Saline	> 16

  Electrical Conductivity (0 - 5 cm)?

  	Salinity Class	EC (dS/m)
  	Nonsaline	< 0.25
  	Nonsaline	0.25 - 1
  	Nonsaline	1 - 2
  	Very Slightly Saline	2 - 4
  	Slightly Saline	4 - 8
  	Moderately Saline	8 - 16
  	Strongly Saline	> 16

  Electrical Conductivity (0 - 25 cm)?

  	Salinity Class	EC (dS/m)
  	Nonsaline	< 0.25
  	Nonsaline	0.25 - 1
  	Nonsaline	1 - 2
  	Very Slightly Saline	2 - 4
  	Slightly Saline	4 - 8
  	Moderately Saline	8 - 16
  	Strongly Saline	> 16

  pH?

  	Reaction class	pH
  	Extremely acid	< 4.5
  	Very strongly acid	4.5 - 5.1
  	Strongly acid	5.1 - 5.6
  	Moderately acid	5.6 - 6.1
  	Slightly acid	6.1 - 6.6
  	Neutral	6.6 - 7.4
  	Slightly alkaline	7.4 - 7.9
  	Moderately alkaline	7.9 - 8.5
  	Strongly alkaline	8.5 - 9.1
  	Very strongly alkaline	> 9.1

  pH (0 - 5 cm)?

  	Reaction class	pH
  	Extremely acid	< 4.5
  	Very strongly acid	4.5 - 5.1
  	Strongly acid	5.1 - 5.6
  	Moderately acid	5.6 - 6.1
  	Slightly acid	6.1 - 6.6
  	Neutral	6.6 - 7.4
  	Slightly alkaline	7.4 - 7.9
  	Moderately alkaline	7.9 - 8.5
  	Strongly alkaline	8.5 - 9.1
  	Very strongly alkaline	> 9.1

  pH (0 - 25 cm)?

  	Reaction class	pH
  	Extremely acid	< 4.5
  	Very strongly acid	4.5 - 5.1
  	Strongly acid	5.1 - 5.6
  	Moderately acid	5.6 - 6.1
  	Slightly acid	6.1 - 6.6
  	Neutral	6.6 - 7.4
  	Slightly alkaline	7.4 - 7.9
  	Moderately alkaline	7.9 - 8.5
  	Strongly alkaline	8.5 - 9.1
  	Very strongly alkaline	> 9.1

  pH (25 - 50 cm)?

  	Reaction class	pH
  	Extremely acid	< 4.5
  	Very strongly acid	4.5 - 5.1
  	Strongly acid	5.1 - 5.6
  	Moderately acid	5.6 - 6.1
  	Slightly acid	6.1 - 6.6
  	Neutral	6.6 - 7.4
  	Slightly alkaline	7.4 - 7.9
  	Moderately alkaline	7.9 - 8.5
  	Strongly alkaline	8.5 - 9.1
  	Very strongly alkaline	> 9.1

  pH (30 - 60 cm)?

  	Reaction class	pH
  	Extremely acid	< 4.5
  	Very strongly acid	4.5 - 5.1
  	Strongly acid	5.1 - 5.6
  	Moderately acid	5.6 - 6.1
  	Slightly acid	6.1 - 6.6
  	Neutral	6.6 - 7.4
  	Slightly alkaline	7.4 - 7.9
  	Moderately alkaline	7.9 - 8.5
  	Strongly alkaline	8.5 - 9.1
  	Very strongly alkaline	> 9.1

  Sodium Adsorption Ratio?

  	SAR
  	< 1
  	1 - 4
  	4 - 8
  	8 - 13
  	13 - 25
  	25 - 45
  	> 45

  Soil Organic Matter?

  	SOM (kg/m²)
  	< 3
  	3 - 10
  	10 - 17
  	17 - 24
  	24 - 31
  	31 - 45
  	> 45

  Soil Organic Matter - Max?

  	SOM (% By Weight)
  	< 0.5
  	0.5 - 1
  	1 - 2
  	2 - 5
  	5 - 10
  	10 - 30
  	> 30

• ▼▲  Physical

  Avail. Water Holding Capacity?

  	Class	AWC (cm)
  	Very low	< 7.5
  	Low	7.5 - 15
  	Moderate	15 - 22.5
  	High	> 22.5

  Avail. Water Holding Cap. (0 - 25 cm)?

  	Class	AWC (cm)
  	Very low	< 2
  	Low	2 - 4
  	Moderate	4 - 6
  	High	> 6

  Avail. Water Holding Cap. (0 - 50 cm)?

  	Class	AWC (cm)
  	Very low	< 4
  	Low	4 - 8
  	Moderate	8 - 12
  	High	> 12

  Bulk Density, 1/3 bar?

  	Bulk Density, 1/3bar (g/cm³)
  	< 1
  	1 - 1.2
  	1.2 - 1.3
  	1.3 - 1.4
  	1.4 - 1.5
  	1.5 - 1.6
  	> 1.6

  Drainage Class?

  	Drainage Class
  	Excessively drained
  	Somewhat excessively drained
  	Well drained
  	Moderately well drained
  	Somewhat poorly drained
  	Poorly drained
  	Very poorly drained

  Rock Fragments (0 - 25 cm)?

  	% By Volume
  	< 5
  	5 - 10
  	10 - 20
  	20 - 30
  	30 - 40
  	> 40

  Sat. Hyd. Conductivity (Ksat) - Mean?

  	Class	Ksat (µm/s)
  	Very low	< 0.01
  	Low	0.01 - 0.1
  	Moderately low	0.1 - 1
  	Moderately high	1 - 10
  	High	10 - 100
  	Very high	> 100

  Sat. Hyd. Conductivity (Ksat) - Min?

  	Class	Ksat (µm/s)
  	Very low	< 0.01
  	Low	0.01 - 0.1
  	Moderately low	0.1 - 1
  	Moderately high	1 - 10
  	High	10 - 100
  	Very high	> 100

  Sat. Hyd. Conductivity (Ksat) - Max?

  	Class	Ksat (µm/s)
  	Very low	< 0.01
  	Low	0.01 - 0.1
  	Moderately low	0.1 - 1
  	Moderately high	1 - 10
  	High	10 - 100
  	Very high	> 100

  Sat. Hyd. Conductivity (Ksat) (0 - 5 cm)?

  	Class	Ksat (µm/s)
  	Very low	< 0.01
  	Low	0.01 - 0.1
  	Moderately low	0.1 - 1
  	Moderately high	1 - 10
  	High	10 - 100
  	Very high	> 100

  Soil Texture (0 - 5 cm)?

  

  Soil Texture (0 - 25 cm)?

  

  Soil Texture (25 - 50 cm)?

  

  Sand?

  	Percent Sand
  	< 10
  	10 - 20
  	20 - 45
  	45 - 55
  	55 - 70
  	70 - 85
  	> 85

  Sand (0 - 5 cm)?

  	Percent Sand
  	< 10
  	10 - 20
  	20 - 45
  	45 - 55
  	55 - 70
  	70 - 85
  	> 85

  Sand (0 - 25 cm)?

  	Percent Sand
  	< 10
  	10 - 20
  	20 - 45
  	45 - 55
  	55 - 70
  	70 - 85
  	> 85

  Sand (25 - 50 cm)?

  	Percent Sand
  	< 10
  	10 - 20
  	20 - 45
  	45 - 55
  	55 - 70
  	70 - 85
  	> 85

  Sand (30 - 60 cm)?

  	Percent Sand
  	< 10
  	10 - 20
  	20 - 45
  	45 - 55
  	55 - 70
  	70 - 85
  	> 85

  Silt?

  	Percent Silt
  	< 15
  	15 - 25
  	25 - 40
  	40 - 50
  	50 - 60
  	> 60

  Silt (0 - 5 cm)?

  	Percent Silt
  	< 15
  	15 - 25
  	25 - 40
  	40 - 50
  	50 - 60
  	> 60

  Silt (0 - 25 cm)?

  	Percent Silt
  	< 15
  	15 - 25
  	25 - 40
  	40 - 50
  	50 - 60
  	> 60

  Silt (25 - 50 cm)?

  	Percent Silt
  	< 15
  	15 - 25
  	25 - 40
  	40 - 50
  	50 - 60
  	> 60

  Silt (30 - 60 cm)?

  	Percent Silt
  	< 15
  	15 - 25
  	25 - 40
  	40 - 50
  	50 - 60
  	> 60

  Clay?

  	Percent Clay
  	< 10
  	10 - 15
  	15 - 20
  	20 - 25
  	25 - 35
  	35 - 55
  	> 55

  Clay (0 - 5 cm)?

  	Percent Clay
  	< 10
  	10 - 15
  	15 - 20
  	20 - 25
  	25 - 35
  	35 - 55
  	> 55

  Clay (0 - 25 cm)?

  	Percent Clay
  	< 10
  	10 - 15
  	15 - 20
  	20 - 25
  	25 - 35
  	35 - 55
  	> 55

  Clay (25 - 50 cm)?

  	Percent Clay
  	< 10
  	10 - 15
  	15 - 20
  	20 - 25
  	25 - 35
  	35 - 55
  	> 55

  Clay (30 - 60 cm)?

  	Percent Clay
  	< 10
  	10 - 15
  	15 - 20
  	20 - 25
  	25 - 35
  	35 - 55
  	> 55

• ▼▲  Land Use

  Depth to Restrictive Layer?

  	Depth (cm)
  	< 25
  	25 - 50
  	50 - 100
  	100 - 150
  	> 150

  Hydrologic Group?

  	Group
  	A
  	A/D
  	B
  	B/D
  	C
  	C/D
  	D

  Kw Factor (0 - 25 cm)?

  	Kw Factor
  	< 0.05
  	0.05 - 0.1
  	0.1 - 0.2
  	0.2 - 0.3
  	0.3 - 0.4
  	> 0.4

  Land Capability Class - Non-Irrigated?

  	1
  	2
  	3
  	4
  	5
  	6
  	7
  	8

  Land Capability Class - Irrigated?

  	1
  	2
  	3
  	4
  	5
  	6
  	7
  	8

  Soil Depth?

  	Class	Soil Depth (cm)
  	Very shallow	< 25
  	Shallow	25 - 50
  	Moderately deep	50 - 100
  	Deep	100 - 150
  	Very deep	> 150

  Soil Order?

  	Soil Order
  	Alfisols
  	Andisols
  	Aridisols
  	Entisols
  	Gelisols
  	Histosols
  	Inceptisols
  	Mollisols
  	Spodosols
  	Ultisols
  	Vertisols

  Soil Temperature Regime?

  	Isohyperthermic
  	Hyperthermic
  	Isothermic
  	Thermic
  	Isomesic
  	Mesic
  	Isofrigid
  	Frigid
  	Cryic
  	Gelic
  	Pergelic

  Wind Erodibility Group?

  	WEG
  	1
  	2
  	3
  	4
  	4L
  	5
  	6
  	7
  	8

  Wind Erodibility Index?

  	WEI (tons/ac/yr)
  	< 1
  	1 - 38
  	38 - 48
  	48 - 56
  	56 - 86
  	86 - 134
  	> 134

  Köppen-Geiger Climate?

  	Climate
  	Tropical, rainforest
  	Tropical, monsoon
  	Tropical, savannah
  	Arid, desert, hot
  	Arid, desert, cold
  	Arid, steppe, hot
  	Arid, steppe, cold
  	Temperate, dry summer, hot summer
  	Temperate, dry summer, warm summer
  	Temperate, no dry season, hot summer
  	Temperate, no dry season, warm summer
  	Cold, dry summer, hot summer
  	Cold, dry summer, warm summer
  	Cold, dry summer, cold summer
  	Cold, dry winter, hot summer
  	Cold, dry winter, warm summer
  	Cold, no dry season, hot summer
  	Cold, no dry season, warm summer
  	Cold, no dry season, cold summer
  	Polar, tundra

  Survey Type?

  	Survey Type
  	SSURGO
  	STATSGO

• ▼▲  Soil Color

  Soil Color (10 cm)?

  	Rock
  	Water
  	Playa

  Soil Color (25 cm)?

  	Rock
  	Water
  	Playa

  Soil Color (50 cm)?

  	Rock
  	Water
  	Playa

  Soil Color (75 cm)?

  	Rock
  	Water
  	Playa

  Soil Color (125 cm)?

  	Rock
  	Water
  	Playa

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