SPADA Meeting Book

( b ) Manufactured Soil 2 (88% sand + 8 % clay + 4 % humus).— In each of two 1 L 498 acid-washed jars, place 440 g silica sand. To each jar, add 40 g Montmorillonite clay and 499 20 g humus. Tightly close each jar with a Teflon-lined lid and mix on a 3-dimensional 500 soil mixer for at least 18 h.

501 502 503 504

9.0 Additional Soil Resources

9.1 Nonprofit, Laboratory, and Archival Resources 505 archived soils. Included are active academic soil science departments at leading 506 universities, governmental organizations, and nonprofit nongovernmental organizations. 507 Nearly all of the universities listed have extension services for their communities and 508 some include laboratory testing services as indicated. Table 2, however, is not intended to 509 be comprehensive of all available resources. 510 511 Table 2. U.S. academic and nonacademic resources for soil information, testing, data, and 512 archives 513 Organization Website a Comments Academic soil science departments Michigan State U. https://www.canr.msu.edu/psm/ Table 2 lists available nonprofit resources for information, analytical testing, and/or

Soil and plant nutrient laboratory Particle size and water retention analyses Soil testing laboratory Soil fertility laboratory Soil testing laboratory

North Carolina State U. at Raleigh North Dakota State U.

https://cals.ncsu.edu/crop-and-soil-sciences/

https://www.ndsu.edu/soils/

Ohio State U.

https://senr.osu.edu http://pss.okstate.edu

Oklahoma State U. Pennsylvania State U.

https://ecosystems.psu.edu/graduateprograms/soil- science

Soil testing laboratory https://agsci.psu.edu/aasl/s oil-testing

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