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Effects Of Time Of Application Of Glyphosate In The Control Of Johnsongrass, Marlin Moody

Masters Theses & Specialist Projects

Investigations were conducted to determine the effects of the herbicide glyphosate and its time of application on the control of johnsongrass.

Johnsongrass plots were divided into areas designated undisturbed, spring plowed, and clipped. These areas were compared to determine differences in control of johnsongrass when using glyphosate with different management procedures. Glyphosate was applied at weekly intervals and treatment effects were statistically analyzed. There were three replications of each treatment.

It appears from the results that:

1. Glyphosate kills approximately 100% of the johnsongrass topgrowth regardless of the application date.

2. Height of the johnsongrass plant at the time of glyphosate application …

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Evaluation Of Glyphosate In No-Till Double Crop Soybeans Using Varying Volumes & Pressures, Charles Rogers

Masters Theses & Specialist Projects

No-tillage production of crops has developed and become widespread since the late 1950/s. No-till is dependent upon the use of broad spectrum herbicides to kill weeds already growing at planting time. Until recently, this has almost exclusively been paraquat (1,1'-dimethy1-4,4'-bipyridinium ion). Glyphosate [N-(phosphonomethyl)glycine] is a new herbicide which has great potential for use in no -tillage production.

Soybeans (Glycine max L.) were planted in the stubble after wheat (Triticum aestivum L.) was harvested. All plots received applications of the residual herbicides alachlor [2-chioro-2',6'-diethyl-N-(methoxymethyl)acetanilide] and linuron [3-(3,4-dichlorophenv1)-1-methoxy-1-methylurea]. Each plot also received either paraquat or glyphosate or was designated as …

Iron Requirement Of Pigs Farrowed In Metal Farrowing Stalls, Rebecca Walker

Masters Theses & Specialist Projects

Pigs farrowed and reared in metal farrowing stalls were studied to determine the need for iron. Three treatments were studied, namely—T-O (pigs given no iron injection), T-1 (pigs given 1 iron-dextran injection at 2 days of age) and T-2 (pigs given 2 injections of iron-dextran, the first at day 2 and the second at day 7). Hemoglobin levels were analyzed to determine the incorporation of iron in the bloodstream in the form of hemoglobin. Pig weights were used as a measure of production.

The hemoglobin levels did not differ (p>0.1) among the 3 treatments at birth, 4 days, 6 …