When it comes to agriculture, crop yields depend heavily on the type and condition of the soil on the land being used for cultivation. In efforts to alter the soil and improve crop yields, the use of agricultural machinery has exponentially increased in the last century. However, the heavy machinery has lead to compacted soils that inhibit crop growth. Simulate the effects of soil compaction on plant growth to examine the impacts of agricultural mechanization on the environment. This kit contains enough materials for 8 groups of students and comes with a Teacher's Manual and student study guide copymaster. The activity covers AP Environmental Science primary learning objectives EIN-2.C and EIN-2.D. Kit Includes: Pea Seeds, 50 g 32 Growing Cups, 9 oz. Soil, Bag Sand, 3 kg Clay Powder, 1 kg 8 Scooping Cups 16 Mixing Bags, 8” x 10” 4 Misting Bottles DOT Info: Non-regulated. WARNING: This product can expose you to chemicals including Strong inorganic acid mists containing sulfuric acid, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov. *AP® and the Advanced Placement Program are registered trademarks of the College Entrance Examination Board. The activities and materials in these kits were developed and prepared by Aldon, which bears sole responsibility for their contents