Established in 1978, Weld Laboratories has served the analytical needs of the agricultural and environmental industries for over 40 years. We have found that the key to good chemistry is having great chemists. Weld Labs offers a comprehensive list of analytical services including packages for: Feed and Forage testing, plant tissue, agricultural soil, manure, compost, fertilizer, livestock water, irrigation water, drinking water, wastewater, and gas/oil spill testing.