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Photo Station #181



MAR381_1 MAR 1938 1

Photo Archive No. 181.1.1938.03.1

C-222. P.S. 181. Study Area #133, NW corner, 18 inch contour furrow area. Grass density not over 0.02, badly depleted. Photo just prior to trenching. See C-267. 3/10/38. 301.

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MAR381_2 MAR 1938 1

Photo Archive No. 181.1.1938.03.2

C-267. P.S. 181. Study Area #133. Northwest corner of 18 inch contour furrow area. See C-222. 3/28/38. 301.

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NOV20001 NOV 2000 1

Photo Archive No. 181.1.2000.11

PS 181. November 21, 2000, 11:00 a.m. Facing southeast. Pasture 2S. ASA 125 Plus X film. 35mm lens focal length. Fence post is in photo as in March 10, 1938, about 200 paces west of road 486. Rocks on soil surface following 1938 root-plowing. Eragrostis lehmanniana is dominant grass; snakeweed dominant shrub. Scattered burroweed; Muhlenbergia porteri under larger mesquites. M. McClaran.

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181_1_2007_03 MAR 2007 1

Photo Archive No. 181.1.2007.03

PS. 181. 23 March 2007. Facing southeast, Azimuth 150. Pasture 2SW. Elevation 1120 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present in picture as in 1938. Mesquite alive, some dead of burroweed and snakeweed. Other small shrubs are Calliandra and velvet pod mimosa at witness and near prickly pear right midground. Prickly pear and at distant find small cholla. Small Lehmann lovegrass dominate open areas and black grama plants near witness. Under larger mesquites find cottontop, bush muhly and Setaria. Cloudy conditions. Compared to 2000, less burroweed, more prickly pear now. M. McClaran photographer, no assistant.

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181_1_2009_03 MAR 2009 1

Photo Archive No. 181.1.2009.03

PS. 181. 17 March 2009. Facing southeast, Azimuth 150. Pasture 2SW. Elevation 1121 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present in picture as in 1938 and placed a white painted rebar at location of camera which is ~15 m north of witness post. Mesquite alive, some burroweed and snakeweed. Other small shrubs are Calliandra and velvet pod mimosa at witness and near prickly pear right midground. At distant find small cholla that is not in photograph. Lehmann lovegrass dominant grass, the same black grama plants near witness as in 2007. Under larger mesquites find cottontop, bush muhly and Setaria. Rocl on surface were likely results of contour plowing in 1938. Large tree in left midground is present in 1938 photograph. Compared to 2007, more cottontop increased. M. McClaran photographer, A. Peterson assistant.

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Last updated - August 2009
Mitchel McClaran - mcclaran@u.arizona.edu