44-0-0 25% XCU ? 25-0-0 (35% XCU + 65% Aluminum sulfate) ? 46-0-0 granular urea (a) ? 46-0-0 prilled urea (b) ? (a) (b) what't's the difference? I realize that fall is the best time to "load up" with heavy rates of N in the upper Midwest, and we need to order more fert now, so I'd like opinions from users. Is the A sulfate truly beneficial in late fall (winterizer), or is urea the best bang for the buck? I kinda need an answer within 3 days. Thanks very much in advance.