Organic Fertilizer Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.Organic fertilizers are made from mineral deposits along with bone meal, plant meal, or composted manure, while synthetic fertilizers are made by processing raw materials. The numeric ratio listed on a fertilizer, whether it's organic or synthetic, indicates the proportions of the nutrients inside. For example, a bag of fertilizer labeled "4-8-6" contains 4 pounds of nitrate, 8 pounds of phosphate, and 6 pounds of potash. A 100-pound bag of 4-8-6 organic fertilizer and a 100-pound bag of 4-8-6 synthetic fertilizer may differ in other respects, but not in the amount of nutrients they deliver into your soil. Which of the following, if true, most strengthens the argument above? Organic fertilizers are produced with an equivalent bag size and nutrient ratio for every synthetic fertilizer bag size and nutrient ratio that is produced. The mechanisms by which organic and synthetic fertilizers are absorbed in soil are not substantially different. The total number of pounds of organic nitrate, phosphate, and potash delivered into soil each year in organic fertilizer equals the total number of pounds of each delivered in synthetic fertilizer. A variety of different tests conducted last year found that levels of nutrients or contaminants other than nitrate, phosphate, and potash in distinct soils that had been treated with a volume of 4-8-6 synthetic fertilizer were no higher than those in samples treated with a volume of 4-8-6 organic fertilizer. The design and the use of organic fertilizer are in no way motivated by a desire to deliver a different amount of nutrients into soil for a given nutrient ratio. Review Answer