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University of Arizona (1965)

Effects of rainfall on soil surface characteristics following range seeding practices

Williams, Gerald,

Titre : Effects of rainfall on soil surface characteristics following range seeding practices

Auteur : Williams, Gerald,

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1965

Résumé
Data were collected from twenty-four 6x12 foot study plots during June late August 3 and early September of 196^ sear Tombatone , .Arizona These data were used to indicate relationships that exist between soil surface’ characteristics, • range improvement treatments-, and - crown cover, and overland runoff and soil erosion » Overland runoff and soil erosion are a result of summer rainfall of about average amount and intensity, Analyses of the data - indicate that : 1. After treatments soil surface characteristics tended to ap proach equilibrium conditions with the environment after one summer o f •rainfall. 2. Runoff shows very little correlation with treatments, but ’shows a significant correlation with c r o w cover. , 3- Crown-’cover reduces the. force of raindrop impact, which reduces the microrotopography changes. ,4. Crown cover appears to have no effect on changes in surface materials after summer rainfall. 5. Soil movement generally increases at the lower end of the plots, possibly due to increased velocity of surface flow. 6. Further basic research involving vegetation, runoff, and soil surface characteristics is needed to substantiate results obtained from this study.

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