Breakfast cereal Oats Company made a candy-coated puffed cereal, a wheat-based product similar to Cracker Jack's candy-coated popcorn. Ranger Joe, the first pre-sweetened breakfast cereal, and little more than candy-coated puffed wheat or rice, was introduced in the US in 1939. After World War II, the big breakfast cereal companies—now including General Mills, who entered the market in 1924 with Wheaties—increasingly started to target children. The flour was refined to remove fiber, which at the time was considered to undermine digestion and absorption of nutrients, and sugar was added to improve the flavor for children. The new breakfast cereals began to look
Crop residue whereas cereal straw would reduce next year's soil supply of available nutrients. Over time, the nutrients fixed by soil microbes and humus are released and available to crops. Nutrients from residue are not fully recovered by crops. Just like fertilizer nutrients, nutrients released from crop residue into the soil are susceptible to losses such as leaching (N and S), denitrification (N), immobilization (N, P, K and S), and fixation (P and K). The efficiency of nutrient uptake by crops from fertilizers or residue release is generally thought to be similar. For example, about 50 percent recovery of N in the