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| Alfalfa shoot exhibiting the marginal chlorosis/spotting indicative of K deficiency. Photo credit: J.J. Volenec | Shoot regrowth of K-deficient alfalfa plants is stunted (left) when compared to regrowth of plants provided adequate P and K (right). Photo credit: J.J. Volenec | |
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| Close up of alfalfa leaf displaying marginal chlorosis/spotting indicative of K deficiency. Photo credit: J.J. Volenec | Reduced alfalfa regrowth in plots provided P fertilizer, but under K-limiting conditions. Plots in the rear that were provided both P and K have rapid regrowth and high forage yield. Photo credit: J.J. Volenec | Poor persistence of a 5-yr-old alfalfa stand fertilized with P, but not provided K fertilizer. Photo credit: J.J. Volenec |
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| Poor alfalfa persistence and weed encroachment of 5-yr-old alfalfa plots fertilized with P but not provided K fertilizer. Photo credit: J.J. Volenec | ||