An appraisal of sod suppression techniques on clover establishment and grass recovery /
| Main Author: | |
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| Other Authors: | , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1988.
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| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | Alicia bermudagrass (Cynodon dactylon (L.) Pers.) was used to conduct two separate experiments to evaluate the effects of desiccants, clover, and planting method treatments on fall desiccation, clover survival and production, botanical composition changes and bermudagrass productivity in 1984 and 1985. In the first experiment, a split-split-split plot arrangement was designed with whole plots as Yuchi arrowleaf clover (Trifolium vesiculosum Savi), Mt. Barker subterranean clover (Trifolium subterraneum L.) and Dixie crimson clover (Trifolium incarnatum L.). Subplot treatments were planting methods including drilling, disking-broadcasting seed-cultipacking, and broadcasting seed on soil surface. Sub-sub plot treatments were desiccants, including: control (no chemical), fusilade at 0.3 kg active ingredient (a.i.) ha^-1, glyphosate at 0.6 kg a.i. ha^-1 and paraquat at 0.6 kg a.i. ha^-1. Paraquat was the most effective desiccant in 1984 but could not be statistically separated from glyphosate in 1985. Paraquat was generally more effective at reducing weed populations than either fusilade or glyphosate. Early yields of bermudagrass were reduced by the fall applied rates of glyphosate and fusilade used in this study. In the second experiment, a split-split plot design was arranged with main plots planted with or without subterranean clover. Subplot treatments received the following chemical treatments and their rates: 0, 0.15, 0.30, and 0.60 kg a.i. ha^-1 fusilade, 0.30, 0.60, and 1.2 kg a.i. ha^-1 glyphosate, and 0.60, 1.20, and 0.60 kg a.i. ha^-1 paraquat followed by burning. Paraquat proved to be the most effective material for desiccation purposes and had the additional benefit of providing excellent weed control. Neither burning nor the higher rate of paraquat gave an advantage over the lower rate in any respect. The higher rates of fusilade and glyphosate appear to have resulted in phytotoxicity to the grass as indicated by the next season's growth. The.60 kg ha^-1 rate of fusilade proved especially detrimental to the bermudagrass. These results show that paraquat could be used at low rates to effectively desiccate bermudagrass and possibly other warm season grass sods, for the purpose of obtaining an earlier, more productive stand of clover while causing no loss in productivity of the warm season grass. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Agronomy." |
| Physical Description: | x, 80 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references (leaves 63-65). |