Download or read book The Effect of Six Soil Microorganisms Upon Three Selected Herbicides written by Thomas F. Grafton and published by . This book was released on 1967 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction of Herbicides and Soil Microorganisms written by Boyce Thompson Institute for Plant Research and published by . This book was released on 1971 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction of microorganisms with specific degradative capacities into the soil was shown to be a possible means of ridding the soil of contaminating chemicals. An investigation of the interactions of soil microorganisms and several groups of herbicidal compounds, primarily chlorinated derivatives, was made. In pure culture and in soils the addition of 2,3,5,6-tetrachloroterephthalate (DCPA) had little effect upon bacterial growth, and several microorganisms appeared to use the herbicide as a carbon source. The encouragement of the soil microflora by the addition of nutrient broths resulted in a reduction of toxicity to plants of a number of herbicides. Isopropyl N-phenylcarbamate (IPC) degrading organisms, when added to soil, accelerated the degradation of IPC and related compounds. A membrane 'biologicalilter' device for reducing waterborne biodegradable pollutants was also demonstrated using these organisms.
Download or read book The Effects of Selected Herbicides on the Numbers of Microorganisms in the Soil written by John Frederick Miller and published by . This book was released on 1980 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Some Commercial Herbicides Upon Certain Soil Fungi and Bacteria written by Gordon L. Reigelman and published by . This book was released on 1951 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physiological Effects of a Specific Herbicide on Soil Microorganisms written by Loy M. Nelson and published by . This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determinations of the Effect of Several Herbicides on Soil Microorganisms written by Donald E. Kratochvil and published by . This book was released on 1950 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction of Herbicides and Soil Microorganisms written by Boyce Thompson Institute for Plant Research and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction of microorganisms with specific degradative capacities into the soil was shown to be a possible means of ridding the soil of contaminating chemicals. An investigation of the interactions of soil microorganisms and several groups of herbicidal compounds, primarily chlorinated derivatives, was made. In pure culture and in soils the addition of 2,3,5,6-tetrachloroterephthalate (DCPA) had little effect upon bacterial growth, and several microorganisms appeared to use the herbicide as a carbon source. The encouragement of the soil microflora by the addition of nutrient broths resulted in a reduction of toxicity to plants of a number of herbicides. Isopropyl N-phenylcarbamate (IPC) degrading organisms, when added to soil, accelerated the degradation of IPC and related compounds. A membrane 'biologicalilter' device for reducing waterborne biodegradable pollutants was also demonstrated using these organisms.
Download or read book Effects of Soil Microorganisms and Soil Properties on the Dissipation of Selected Pesticides written by Donald Austin Addison and published by . This book was released on 1968 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Effects of Certain Insecticides and Herbicides on Soil Bacteria written by Elvy Earl Johns and published by . This book was released on 1951 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Certain Insecticides on Selected Soil Microorganisms written by William Edmond Fletcher and published by . This book was released on 1978 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biological Detoxification of Herbicides in the Soil and the Effect of Several Herbicides on Soil Microorganisms written by Jean Smith Whiteside and published by . This book was released on 1958 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction Between Dipyridylium Herbicides and Microbes in Soil written by Chin-ming Tu and published by . This book was released on 1966 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The herbicides Diquat (1, 1'-ethylene-2, 2'-dipyridylium dibromide), Paraquat (1, 1'-dimethyl-4, 4'-dipyridylium dichloride), and Gramoxone (1, 1'-dimethyl-4, 4'-dipyridylium dimethyl sulphate), and the spreader X-77, a mixture of alkylaryl-polyethylene glycol, free fatty acids and isopropanol, were tested by several soil microbial methods in an attempt to find out if concentrations of these compounds at field ratio, and at higher ratio that might result from over-application or reapplication, would either stimulate or inhibit the microorganisms and hence affect soil fertility. Three different soils were used: Chehalis silt loam, Woodburn silt loam, and Chehalis silty clay loam. Plate counts of bacteria and molds in the soils treated with 0.25, 0.5 and 2.5 ppm of the herbicides for periods ranging from 0 to 20 days averaged higher than counts from untreated control samples. The dipyridylium slightly depressed ammonification and sulfur oxidation in Chehalis silty clay loam soil. In the two silt loam soils minor increases resulted. Nitrification was stimulated by the lowest rate, 0.25 ppm, of the herbicides; the higher rates had little influence. A respiration study using carbon dioxide evolution as an index of the metabolic activity of microorganisms in the soil showed that addition of the herbicides resulted in some decrease in microbial activity. The spreader X-77, depressed CO2 evolution only at the excessive rate of 100 ppm in one soil; otherwise it had essentially no effect. Four of six bacterial cultures were able to use Gramoxone as the sole source of carbon and nitrogen in synthetic media. Nitrogen in this herbicide promoted growth better than did the carbon. This should be true for Paraquat also, which differs only in the anion. Analytical recovery of Paraquate and Gramoxone from the different soils was correlated with soil type, more specifically with cation exchange capacity, amount and kind of clay, and content of organic matter. Recoveries ranged from 54 to 114 percent depending upon concentration and soil type. Recoveries generally were greater for lower concentrations. Higher concentrations of the herbicides were recovered less completely. Gramoxone appeared to persist in soil longer than Paraquat. In complete recoveries after incubation are attributed in part to some microbial degradation of the herbicides, and in part to certain soil properties responsible for losses in various stages of the assay. The most significant conclusion from these results is that the dipyridylium herbicides and X-77 spreader when used at recommended rates would produce no serious changes in microbial activities and their contributions to soil fertility.
Download or read book Methods of Analysis for Determining the Effects of Herbicides on Soil Micro organisms and Their Activities written by and published by . This book was released on 1978 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Interactions of Selected Soil Bacteria with the Herbicide Fluometuron written by John Hampton Warner and published by . This book was released on 1974 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Toxicity of Herbicides to Mammals Aquatic Life Soil Microorganisms Beneficial Insects and Cultivated Plants 1950 65 A List of Selected Refere written by Patricia Aten Condon and published by Forgotten Books. This book was released on 2018-03-18 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Toxicity of Herbicides to Mammals, Aquatic Life, Soil Microorganisms, Beneficial Insects and Cultivated Plants, 1950-65: A List of Selected References For the purpose of this bibliography, toxicity is broadly interpreted to mean an unusual effect of an herbicide ona plant or animal. However, especially in the section on mammalian toxicity, articles are included even when the herbicide studied has had no discernible effect on an animal. Whenever possible, chemicals are designated by their common name as approved by the Weed Society of America's Terminology Committee. Toxicity data for many herbicides are available in unpublished reports. These report have been cited only when there is a published abstract of the material which they contain. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book The Effect of Herbicides on Soil Micro organisms written by Jean L. Shennan and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Herbicides Ecological Effects 1979 85 written by Jayne T. MacLean and published by . This book was released on 1986 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
