I collected a small soil sample (a spoonful) from an alfalfa field in Erda, Utah on January 9, 2021. (GPS Coordinates: Latitude: 40.602075 Longitude: -112.335877). I stored the soil in a Ziploc bag for 5 days. The alfalfa field is said to be treated with the following insecticides per acre; 16 oz of Lorasban, 3.8 oz of Lamabacy, 3.2 oz of Methylated Seed Oil.