Degradation of Phenolic Acids by Azotobacter Species Isolated from Sorghum Fields

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Sorghum plants excrete phenolic acids which reduce subsequent crop yields. These acids accumulate in field soil by combining with soil and clay particles to form stable complexes which remain until degraded by bacterial metabolism. The amount of phenolic acids in soil samples were obtained by gas chromatography measurements, while Azotobacter populations were obtained by plate counts in 40 sorghum field samples from Denton County, Texas. One can conclude that increasing the Azotobacter population in the soil increased the degradation rate of phenolic acids proportionally. It is proposed that seed inoculation will introduce selected strains of Azotobacter into the soil. The ... continued below

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vi, 44 leaves : ill., maps

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Al-Hadhrami, Mohamed N. (Mohamed Nasser) August 1989.

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  • Al-Hadhrami, Mohamed N. (Mohamed Nasser)

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Sorghum plants excrete phenolic acids which reduce subsequent crop yields. These acids accumulate in field soil by combining with soil and clay particles to form stable complexes which remain until degraded by bacterial metabolism. The amount of phenolic acids in soil samples were obtained by gas chromatography measurements, while Azotobacter populations were obtained by plate counts in 40 sorghum field samples from Denton County, Texas. One can conclude that increasing the Azotobacter population in the soil increased the degradation rate of phenolic acids proportionally. It is proposed that seed inoculation will introduce selected strains of Azotobacter into the soil. The presence of Azotobacter should increase crop size in subsequent plantings.

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vi, 44 leaves : ill., maps

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  • August 1989

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  • March 9, 2015, 8:15 a.m.

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Al-Hadhrami, Mohamed N. (Mohamed Nasser). Degradation of Phenolic Acids by Azotobacter Species Isolated from Sorghum Fields, thesis, August 1989; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc501189/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .