This Mosaic Crop Nutrition article summarizes University of Illinois research (Dr. Fred Below and Dr. Ross Bender, 20 trials over 3 years across 3 Illinois maturity zones) on soybean nutrition using MicroEssentials SZ fertilizer, which supplies P, K, and micronutrients including zinc and sulfur. The research is framed around correcting a common practice of fertilizing only for the preceding corn crop and under-fertilizing soybean, which can "mine" nutrients from the soil. Combined agronomic management (fertility, foliar disease/insect protection, variety selection, row spacing, seed treatments) was shown to increase soybean yield by about 10 bushels/acre, with roughly half attributable to proper nutrient application. The most detailed micronutrient discussed is boron: soybean requires about 0.3 oz B/acre for a 60-bushel crop, compared with only 1.8 oz B/acre needed for a 230-bushel corn crop — noted as a meaningfully different B demand per bushel between the two crops. Boron is described as mobile in the soil (unlike P and K, which are held more tightly), so it can leach through the soil profile and needs ongoing attention even though total removal is low. The article notes soil testing should account for both macro- and micronutrients, and that foliar application can supplement but not replace adequate soil-available micronutrient levels. No specific soil-test thresholds, deficiency symptoms, or application rates/timing for zinc or other micronutrients are given for soybean or corn; the piece is a research-summary/marketing article rather than a technical guideline, emphasizing balanced P/K/micronutrient management and variety/maturity selection as complementary yield levers alongside boron nutrition.