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صورة:Soil profile.jpg


Summary

Description

Graphic of a soil profile showing O, A, B, and C horizons.

Source

http://soils.usda.gov/education/resources/k_12/lessons/profile/profile.jpg

Date

unknown

Author

unknown

Permission
(Reusing this image)

PD-USGov-USDA


Licensing

Public domain This image is a work of a United States Department of Agriculture employee, taken or made during the course of the person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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