Download or read book Relation of Seed Size and Specific Gravity to Germination and Emergence in Sorghum written by Arnaldo Lucena Alvim and published by . This book was released on 1975 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relation of Seed Size and Specific Gravity to Germination and Emergence in Sorghum Sorghum Bicolor L Moench written by A. L. Alvim and published by . This book was released on 1975 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two seed characteristics of grain and forage sorghum were studied to determine the extent to which they were associated with viability and vigor. These characteristics were seed size and specific gravity. Fifty seed were obtained from the Mississippi State Seed Testing Laboratory. Twenty-five lots were separated into three size classes designated as large, medium, and small. The other twenty-five lots were separated into three specific gravity cclasses and designated as light, medium, and heavy. The physiological quality of seed from various seed sizes and specific gravity classes of each lot was evaluated for vaibility by the standar germination test and for vigor by the accelerate aging technique and filed emergence response. There was no consistent relationhip between seed size and viability of processed lots of seed. Each seed lot reacted differently, and there was considerable variations among the lots. Specific gravity seemed to be more consistently related to viability in processed lots than was seed size. In general, in each seed lot, an increase in specific gravity of the seed was accompanied by an increase in germination. Accelerated aging technique as a test for seed (capacity to germinate and emerge after being stressed) revelated that seed of the small size and those of light weight were more inferior after accelerated aging than the other size ans weight classes. In general, large, heavy seed gave better responses than did small, light seed. In the field emergence experiment, the relationships (...).
Download or read book Variation in Seed Specific Gravity in Sorghum Sorghum Bicolor L Moench written by A.S. Goggi and published by . This book was released on 1990 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seeds of seven hybrid and open pollinated sorghum cultivars were separated with sucrose density solutions into four specific gravity (SG) classes for studies on the effects of seed SG on field performance. The seeds were planted at different densities to provide three levels of competition: "normal" planting density; one high and one low SG seeds in the same hill; and single seeds in widely spaced hills, no competition. There were no differences among the high, medium-low and unseparated (control) seed SG treatments for emergence, vegetative and reproductive development for the normal density plantings. Yield, however, was significantly lower for plants of the unseparated (control) seeds as compared to the SG separated seeds. When high and low SG seeds were planted in the same hill, emergence of the high SG seeds was higher and they produced more vigorous plants that produced more tillers, matured earlier and yielded more as compared to those from low SG seeds. In the case of high and low SG seeds planted at non-competitive spacing, emergence, plant height, number of tillers and yield were higher and the number of days to panicle exsertion and anthesis were fewer for the plants from the high SG seeds as compared to those from the low SG seeds. Priming of high SG seeds did not enhance plant performance above the level of the high SG unprimed seeds. Seed SG was greatly affected by the degreee of weathering and immaturity. As the degree of weathering or immaturity increased, the percentages of seeds in the two highest SG classes sharply declined, while those for the two lowest SG classes sharply increased. Seeds from the intense weathering treatments exhibited cavitation and profuse fungal growth in the placental sac area and in the embryo. Similar cavitation was observed in seeds from the immaturity treatments. Differences in the speed of germination among the unweathered, mature, high SG seeds appeared to be related to differences in permeability of the pericarp to water and/or oxygen.
Download or read book Abstracts of Theses and Dissertations written by and published by . This book was released on 1973 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Library Publication written by Mitchell Memorial Library and published by . This book was released on 1975 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by and published by . This book was released on 1995 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by Mississippi. Agricultural and Forestry Experiment Station, State College and published by . This book was released on 1995 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Grain Sorghum Field Emergence and Seed Vigor Tests written by C.E. Detoni and published by . This book was released on 1997 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poor emergence of sorghum [(Sorghum bicolor (L) Moench] affects the stand and potential yields. The major objective of this research was to find correlations among field emergence data and laboratory seed vigor tests. Thirty-two and 30 hybrids of sorghum were planted at three Virginia locations in 1995 and 1996, respectively. Field emergence was subsequently compared with results from laboratory tests that included: 1) standard germination; 2) osmotic-stress using polyethylene glycol 8000 (mw); 3) heat-shock using 2 hr at 50o.C stress; 4) electrical conductivity of steep water of germinating seeds; and 5) seed mass. Field emergence of grain sorghum differed among hybrids years and locations. Mean emergence across years and locations was 67.5%, whereas mean germination in the laboratory was 87.8%. There were interaction between hybrid and loction and between hybrid and year. Germination under optimal conditions (standard germination test) and with osmotic or heat-shock stress differed among hybrids. Regression analyses showed a weak correlation between laboratory germination (with or without stress) and field emergence in both years. The fresh weight of seedlings whether from standard germination or stress tests also differed among hybrids in both years, and the associations with field emergence were weakly correlated in 1996. Hybrids showed significant differences in radicle length when grown under laboratory stress in both years following standard germination. There was weak correlation with field emergence and radicle length following heat-shock treatment in 1996. The measurement of electrical conductivity in the seed steep water showed significant differences among hybrids. A weak correlation with field emergence was seen in 1996. Conductivity values per gram of seed and per cm2 of seed area revealed differences among hybrids. The correlation of these parameters with field emergence was higher than conductivity per seed. Seed mass varied among hybrids in both years, but was no correlation between seed mass and emergence. Of the laboratory parameters examined, germination proved to be the most consistent predictor of variations in field emergence of sorghum hybrids.
Download or read book Bulletin written by Charles Edward Snipes and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationships of Seed Size and Density to Seed Quality in Sorghum Sorghum Bicolor L Moench written by Joseph E. Cortes and published by . This book was released on 1987 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strategies for Improving Physiological Seed Quality written by Charles Edward Snipes and published by . This book was released on 1995 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy Abstracts written by and published by . This book was released on 1995 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).
Download or read book Transactions of the ASAE written by American Society of Agricultural Engineers and published by . This book was released on 1991 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvement of Sorghum Seed Germination and Emergence Under Stress Conditions by Seed Treatments written by Quanchit Santipracha and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sorghum Newsletter written by and published by . This book was released on 1984 with total page 1314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation in Seed Specific Gravity in Sorghum Sorghum Bicolor L Moench written by Alcira Susana Goggi and published by . This book was released on 1990 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Field Emergence of Grain Sorghum written by Charles Christopher Baskin and published by . This book was released on 1993 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
