Phosphorus (P) is an essential macronutrient for potato growth and development. In Florida’s Tri-County Agricultural Area (TCAA) P is applied annually at high rates to ensure yields. This practice has led to a buildup of soil P with Mehlich-3 soil nutrient P levels as high as 475 mg/kg. Potato farmers customarily apply P fertilizers despite their soil likely already containing high levels of this nutrient. Current fertilization programs do not account for legacy P fixed by minerals in the soil making it unavailable to crops. Published articles show that soil amendments such as biochar, compost, gypsum, and humic acid could increase bioavailable P by decreasing the amount of the nutrient that is fixed to soil minerals. Cover cropping or mulching could also be beneficial. To increase bioavailable P and maximize fertilizer utilization, re-evaluation and revision of current farm practices and fertilizer recommendations for potato production in the TCAA is required.

磷（P）是马铃薯生长发育必不可少的常量营养素。在佛罗里达州的三县农业区 (TCAA)，每年以高比例施用磷以确保产量。这种做法导致土壤磷积累，Mehlich-3 土壤养分磷水平高达 475 毫克/公斤。尽管马铃薯种植者的土壤可能已经含有高水平的这种养分，但他们通常会施用磷肥。当前的施肥计划没有考虑土壤中矿物质固定的遗留磷，使其无法用于作物。已发表的文章表明，生物炭、堆肥、石膏和腐殖酸等土壤改良剂可以通过减少固定在土壤矿物质上的养分量来增加生物可利用的磷。覆盖作物或覆盖也可能是有益的。为了增加生物可利用 P 并最大限度地提高肥料利用率，