NSIS Volume 35 - Part 2
Permanent URI for this collectionhttps://hdl.handle.net/10222/15108
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Item Open Access Fate of Glyposate in a Sandy Loam Soil and Analysis for Residues in Field-Grown Crops(Dalhousie Printing Press, 1985-12) Ragab, M.T.H.; Abdel-Kader, M.K.H.; Stiles, David A., 1938-Following application in the spring to a sandy loam soil, residues of glyphosate (N-phosphonomethyl glycine) decreased rapidly and degraded into aminomethylphosphonic acid which also was short lived. Analysis for glyphosate and its metabolite as their methyl trifluoroacetate derivatives was by the flame specific phosphorus gas chromatography. Glyphosate and its metabolite in the soil at 1, 10, 19, 29, 52, 86 and 122 days after application was 69.5, 29.6, 22.1, 14.1, 11.7, 4.2 and 0.0% and 2.3, 31.0, 35.2, 24.0, 15.0, 9.4 and 6.1%, respectively, of the 4.25 kg a.i./ha applied. Neither compound was found in field-grown barley, oat, wheat, sweet corn, beans, peas, red beet or carrots. No injury symptoms were observed on any of the crops during the growing season.Item Open Access Fall and Winter Food Habits of the Eastern Coyote Canis latrans in Southereastern New Brunswick(Dalhousie Printing Press, 1985-12) Lapierre, L.E.Food habits of coyotes in southeastern New Brunswick were investigated during the fall and winter trapping seasons from 1979 to 1982. Based on analyses of 128 specimens, snowshoe hare, white-tailed deer and rodents accounted for 37.5, 27.9 and 27.3% of stomach contents receptively. These data indicate that the coyote shares a common food base with the red fox and the bobcat in the study area.Item Open Access Deterioration of Materials in a Quarter-Megawatt Strawburner(Dalhousie Printing Centre, 1985-12) Whiteway, S.G.; Caley, W. F.; Peill, J.An outline is given of the deterioration of refractories and stainless steels during the operation of a large strawburning furnace. The deterioration was caused by high temperatures, which sometimes exceeded 1400°C, and by a corrosive slagged ash. The use of different materials in alleviating these problems is described. Laboratory experiments on the corrosion of metals by straw slag are discussed, including work to determine the influence of chloride on the extent of corrosion.Item Open Access Experimental Studies of the Effects of Acidity and Associated Water Chemistry on Amphibians(Dalhousie Printing Centre, 1985-12) Kerekes, Joseph J.; Dale, J.M.; Freedman, B.Laboratory bioassays with 5 species of Nova Scotian amphibians (Ambystoma maculatum, Hyla crucifer, Rana sylvatica, R. palustris, and Bufo americana) and Xenopus laevis revealed pH 4.0 to 5.0 as the critical range within which developing embryos showed reduced hatching success, and below which hatching did not occur. Bioassays revealed differences in acid tolerance among various species of Nova Scotia amphibians. For some species, aluminum in combination with pH< 5, had a deleterious effect. Calcium ameliorated pH toxicity, but in some cases mortality was increased at very high Ca concentrations (?50 ppm). Larvae of Rana clamitans and adult Notophthalmus viridescens survived exposure to pH as low as 3.3, but this tolerance was reduced at low temperatures.