Download or read book Seed Quality of Guayule Parthenium Argentatum Gray written by Claude Ron Bekaardt and published by . This book was released on 2006 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Germination and characterization of guayule Parthenium argentatum Gray seed written by M. H. A. Jorge and published by . This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guayule (Parthenium argentatum Gray) is a natural rubber producing plant presently being commercialized for production in arid and semi-arid regions of the world. Inconsistent seed (achenes) quality and the lack of methods to discriminate between good and bad seed lots are significant problems, allowing commercial stands to be established only by transplants, reather than by more cost effective direct-seeding. The objective of this study was to investigate why guayule seed and seed lots vary significantly in quality. The laboratory and greenhouse experiments involved separation of seed based on physical attributes (Diameter, color and weight) and the confirmation of internal structures (embryo and endosperm) by x-ray analysis. The effect of different conditioning treatments of seed lots was also tested. Separation of seed by size (diameter) was shown to be less efficient than separation by color. Color was the most effective means of separating heavier and darker (opaque-black and gray color grades) seed, and these seed were confirmed to be filled containing internal structures by x-ray analysis. Germination percentage and rate were greater for seed with these characteristics than for yellow and bright-black seed, which are lighter and predominately partially filled or unfilled. Conditioning treatments used for guayule seed older than two years had no effect on seed germination and emergence percentage or rate. However, differences in germination and emergence were found among lines, therefore, differences among seed lots appear to be due to variation in the number of filled seed. The quality of seed lots was significantly improved when seed were separated bases on color first, then by weight. The separation of good quality seed (filled) from poor quality seed (unfilled) is crucial to lower the costs of stand establishment by direct seeding. Therefore, the quality of seed lots can be improved significantly (higher proportion of filled seed) by separating first by color, then by weight.
Download or read book L Incurie gouvernementale written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guayule Parthenium Argentatum Gray written by Francis Ernest Lloyd and published by . This book was released on 1911 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stimulation of Guayule Parthenium argentatum Gray seed germination and seedling development written by Richard Francis Hurley and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Germination and Physical Properties of Guayule Parthenium Argentatum Gray Seed written by Marcos Da Cruz and published by . This book was released on 2003 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potential New Crop written by Jerry Rafats and published by . This book was released on 1991 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research on Guayule Parthenium Argentatum 1942 1959 written by Bayard Louis Hammond and published by . This book was released on 1965 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Honey Bee Pollination on the Seed Quantity and Quality of Cultivated Guayule Parthenium Argentatum Gray written by Ahmed Noori Mahmood and published by . This book was released on 1987 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potential New Crop Guayule 1970 85 written by Jerry Rafats and published by . This book was released on 1985 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potential New Crop written by Jerry Rafats and published by . This book was released on 1988 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guayule Parthenium Argentatum Gray written by Francis Ernest Lloyd and published by . This book was released on 2015-07-26 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Guayule (Parthenium Argentatum Gray): Rubber-Plant of the of Desert the Desert In 1907 the author of the present paper was engaged by the Continental-Mexican Rubber Company and the Intercontinental Rubber Company to organize investigations looking toward the successful cultivation of a Mexican desert rubber plant, the guayule (Parthenium argentatum Gray). Dr. Theodore Whittelsey and Dr. J. E. Kirkwood later became identified with this undertaking, the former as chemist, the latter as assistant botanist. The headquarters for the investigations were established at the Hacienda de Cedros, Partido de Mazapil, Zacatecas, Mexico. It was not a matter for congratulation that, at the close of a year, the directors found it inadvisable, for financial reasons consequent on the panic of 1907, to continue the department of investigation. By the courtesy of the company, however, the author carried on his studies for some three months beyond the termination of his business relations with it, and this period, falling during the growing season of 1908, brought to light many important facts. Still further observations of capital importance, in part on experiments begun in 1907 and 1908, were made by the writer in April 1909, while representing the United States Rubber Company, a commission which could not have been prosecuted without the kind concurrence of President C. C. Thach and a number of the writers colleagues at the Alabama Polytechnic Institute. As silence was not imposed by the United States Rubber Company, it has been possible to include these observations. No less than hearty recognition is due also to Mr. W. H. Stay ton, formerly captain, U. S. Navy, sometime president of the Continental-Mexican Rubber Company, and now president of the Texas Rubber Company. It is stating an open secret to say that it was through the initiative and enthusiasm of this gentleman that the work of the investigation was undertaken and would have been continued but for circumstances beyond his control. Mr. Stayton has shown a liberal and scientific spirit, qualities not of necessity nor at all times associated. Thanks are due further to Prof. J. C. Arthur and Prof. W. G. Farlow for reports on various pathological matters; to Dr. M. T. Cook for contributing manuscript on the galls found on guayule; to Dr. A. D. Hopkins for a report on the guayule bark-borer; to Dr. L. O. Howard and Dr. J. G. Sanders for the identification of certain insects; and to Prof. B. L. Robinson for his courtesy in causing a photograph of the type specimen of guayule to be made. Mr. Charles S. Ridgway has rendered substantial aid in the preparation of certain figures. 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 Factors Affecting the Productivity of Cultivated Guayule Parthenium Argentatum Gray written by George Alan Stewart and published by CSIRO Publishing. This book was released on 1989 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interspecific Hybridization in the Genus Parthenium written by Jan Edward West and published by . This book was released on 1986 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guayule written by Francis Ernest Lloyd and published by . This book was released on 1911 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guayule Parthenium argentatum written by Maria Aparecida S. Soares and published by . This book was released on 1986 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potential New Crop written by Jerry Rafats and published by . This book was released on 1991 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
