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Southwest Wisconsin Technical College needed a visual aid for some of their ag classes. Rather than simply showing students pictures of nutrient deficient alfalfa, they wanted to offer a three-dimensional view of crop nutrition. So we created these alfalfa nutrient deficiency models.
The alfalfa set included two plants. One shows the macronutrient deficiencies of phosphorus, potassium, magnesium, sulfur, and calcium. The other displays the boron micronutrient deficiency as well as leafhopper damage.
The leaves of the alfalfa nutrient deficiency models are painted and sculpted by hand. The plant models are enclosed in a removable clear plastic case that is attached to the base with thumbscrews. When the case is in place, the lightweight display can be easily transported using the handle at the top of the case.