Physical and chemical properties of agricultural soils from diverse growing regions of Oregon

Table 1: Physical and chemical properties of agricultural soils from diverse growing regions of Oregon.

Soil order	Alifisols				Aridisols	Mollisols
Soil Series	Quatama^a		Latourell^a		Adkins^b	Willamette^a	Madras^c		Cullius^c
USDA Taxonomic Subgroup	Aquultic Haploxeralfs		Ultic Haploxeralfs		Xeric Haplocalcids	Pachic Ultic Argixerolls	Aridic Argixerolls		Aridic Lithic Argixerolls
Drainage and Permeability	Well drained; moderate		Well drained; moderate		Well drained; moderate	Well drained; moderately slow	Well drained; moderately slow		Well drained; slow
Precipitation and Air Temperature	1150 mm/45 in 12 ℃ /53°F		1270 mm/50 in 12 ℃ /53 °F		203 mm/8 in 11 ℃ /52 °F	1150 mm/45 in 11 ℃ /52 °F	254 mm/10 in 9 ℃ /48 °F		254 mm/10 in 9 ℃ /48 °F
Total Acreage of Soil Series^d	21,058		15,241		93,879 OR: ~31,500	38,735	75,367		19,606
Crops	Berries, row crops, vegetables, orchards, nursery, grains		Vegetables, nursery stock, fruits		Wheat	Fruit and nut trees, berries, vegetables	Irrigated cropland		Irrigated cropland
Soil Physical Properties^e
Clay%^f		23.1		13.5		6.0	24.6	24.3		39.1
Silt %^f		37.6		42.0		34.0	66.6	36.3		33.8
Sand %^f		39.3		44.5		60.0	8.8	39.4		27.1
Particle size		Fine-loamy		Fine-loamy		Coarse-loamy	Fine-silty	Fine-loamy		Clayey
Available Water Capacity (cm/cm)^g		0.17		0.18		0.16	0.20	0.16		0.17
Organic Matter (%)^h		4.3 (1.50)		4.3 (2.50)		1.8 (0.85)	3.9 (5.00)	2.6 (1.50)		2.6 (1.50)
Mineralogy		Mixed		Mixed		Mixed	Mixed	Mixed		Smectitic
Hydrologic Soil Group		C		B		B	C	C		D
Soil Chemical Properties
Cation Exchange Capacity (meq/100 g)^d		12.9		8.7		7.5	20.0	21.3		25.8
pH^g		5.0 (5.8)		5.4 (5.8)		6.1 (7.2)	5.1 (6.1)	6.5 (7.4)		6.6 (7.4)
NO₃-N (ppm)		18		26		126	30	21		9
P Weak Bray (ppm)		78		89		69	91	35		32
P NaHCO₃-P (ppm)		93		130		55	125	44		38
K (ppm)		205		228		560	289	485		491
Mg (ppm)		162		129		212	92	587		595
Ca (ppm)		1157		1140		1050	1071	1507		1509
Na (ppm)		4		3		33	2	37		39
SO₄-S (ppm)		10		6		17	5	4		3
Zn (ppm)		2.9		0.8		2	0.9	0.8		0.8
Mn (ppm)		3		2		5	5	8		14
Fe (ppm)		84		75		29	117	49		49
Cu (ppm)		1		0.7		0.8	0.4	2		2.1
B (ppm)		0.1		0.2		0.7	0.2	0.3		0.3

^aSoil obtained from North Willamette Research and Extension Center,

Aurora, OR.

^bSoil obtained from Hermiston Agricultural Research and Extension Center, Hermiston, OR.

^cSoil obtained from Central Oregon Agricultural Research Center,

Madras, OR.

^dAcreage of soil series obtained from the Series Extent Explorer (https://casoilresource.lawr.ucdavis.edu/see). Adkins soil series is present in OR and WA with estimated OR acreage from web soil survey (https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx). All other series are only present in OR.

^eComposition obtained through NRCS (U.S. Natural Resources Conservation Service)) using 0-50 cm depth.

^fClay% is the percentage of mineral soil particles less than 0.002 mm in diameter. Silt% is the percentage of mineral soil particles between 0.002 and 0.05 mm in diameter. Sand% is the percentage of mineral soil particles between 0.05 and 2 mm in diameter.

^gAWC-quantity of water that the soil is capable of storing for use by plants. The capacity for water storage is given in cm of water per cm of soil for each soil layer.

^hpH and organic matter are reported from analytical measurements from Edge Analytical and from the USGS-NRCS database. USGS reference information is presented in parentheses.