Can the world be fed using organic fertilizers?
Organic farming is less efficient and lower yielding than farming with mineral fertilizers. This is partly because mineral fertilizers deliver far more essential nutrients per unit than does organic matter. In many countries the depleted soils can no longer deliver enough organic matter to maintain soil health. If the world’s 1.5 billion acres of farmland were to be farmed organically, we would have enough food for about 2.4 billion people – leaving more than 50% of the worlds 6 billion people without food. In addition, it is difficult to guarantee an optimal balance among or quality of vital crop nutrients using only organic sources. For example, providing enough nitrogen for a crop by applying manure would mean adding 4 to 5 times more potassium and phosphorous than is needed. Runoff can pollute waterways and the life they support. Mineral fertilizers are generally cost effective but require an up front investment that may be difficult for small farmers without credit. Ideally, miner
