Submitted to: Society for Range Management Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/21/2017
Publication Date: 1/27/2018
Citation: Blank, R.R., Clements, D.D., Morgan, T.A., Harmon, D.N. 2018. The effect of herbicide application on rangeland soil nutrient availability. Society for Range Management Meeting Abstracts. 71:394.
Interpretive Summary: Not applicable
Technical Abstract: Very sparse literature exists on the effect of soil active herbicides on nutrient availability. As part of a larger rangeland rehabilitation project, on four sites in northern Nevada, we quantified the effect of the herbicides Landmark®, Perspective®, and Plateau® relative to controls on surface soil (0-10 cm) nutrient availability. Samples were collected multiple times over two years. The data set is complex and herbicide treatments interacted with site and time of sampling. Overall, relative to the controls, mineral N, soil-solution sulfate, and bicarbonate-extractable phosphorus quantities were often elevated on herbicide-treated plots. In addition, on some sites, herbicide treatments affected micronutrient availability. We believe these changes in nutrient availability are largely a function of vegetation loss (lack of nutrient uptake) due to the herbicides. We will continue to monitor plots for at least one more year.