126855-Thumbnail Image.png

Student capstone and applied projects from ASU's School of Sustainability.

Displaying 1 - 2 of 2
Filtering by

Clear all filters

Adding a Soil Fertility Dimension to Locust and Grasshopper Management, a Case Study in West Africa

Description
In Senegal, West Africa, soils are a vital resource for livelihoods and food security in smallholder farming communities. Low nitrogen (N) soils pose obvious challenges for crop production but may also, counterintuitively, promote the abundance of agricultural pests like the Senegalese locust, Oedaleus senegalensis. In this study I investigated how…

In Senegal, West Africa, soils are a vital resource for livelihoods and food security in smallholder farming communities. Low nitrogen (N) soils pose obvious challenges for crop production but may also, counterintuitively, promote the abundance of agricultural pests like the Senegalese locust, Oedaleus senegalensis. In this study I investigated how the abundance of locusts and grasshoppers are impacted by soil fertility through plant nutrients and how these variables change across land use types. We worked in two rural farming villages in the Kaffrine region of Senegal. Overall, there was little variation in soil properties and an agricultural landscape low in soil organic matter (SOM) and inorganic soil nitrogen. I corroborated that SOM is a significant driver of soil inorganic N, which had a positive relationship to plant N content. Of the management practices we surveyed, fallowing fields was important for soil nutrient restoration and years spent fallow was significantly correlated to inorganic soil N and SOM. O. senegalensis was least abundant in groundnut areas where plant N was highest. Additionally, I found a significant negative correlation between O. senegalensis abundance and plant N, suggesting that plant nutrients are an important driver of their populations. Grasshoppers, excluding O. senegalensis, were more numerous in grazing areas and fallow areas, perhaps due to a higher diversity of ecological niches and host plants. These results connect land use, soil, and vegetation to herbivores and suggest that improving soil fertility could be used as an alternative to pesticides to keep locusts at bay and improve crop yields.
ContributorsWord, Mira (Author) / Hall, Sharon (Contributor) / Robinson, Brian (Contributor) / Manneh, Balanding (Contributor) / Beye, Alioune (Contributor) / Cease, Arianne (Contributor)
Created2018-04-10
126621-Thumbnail Image.png

Leveraging Knowledge for Zero Waste @ ASU

Description
Arizona State University had established a set of institutional sustainability goals of which Circular Resources or zero waste was one. The university currently has an established department and subsequent programs and initiatives to drive success towards university wide zero waste, however there was still opportunity for growth to help the…

Arizona State University had established a set of institutional sustainability goals of which Circular Resources or zero waste was one. The university currently has an established department and subsequent programs and initiatives to drive success towards university wide zero waste, however there was still opportunity for growth to help the university achieve the goal. This paper examines the process taken to assess organizational conditions used to justify the implementation of a new engagement strategy to advance the Circular Resources/Zero Waste goal. Readers should walk away with an understanding of how to translate this same process into other organizational structures.
ContributorsSchumacher, Katie (Writer of accompanying material)
Created2020-05-13