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Soil and Plant Analysis lab - Iowa State University

The Iowa State University Soil and Plant Analysis Laboratory (SPAL) is part of the Department of Agronomy in the College of Agriculture at Iowa State University. We provide soil, plant, water and environmental testing services to farmers, fruit and vegetable growers, landscape managers, home gardeners, researchers, etc. in the State of Iowa and to researchers across the nation. The lab provides cost-effective analytical testing and research-based limestone and fertilizer recommendations to support sustainable management decisions.