eli5 why does manure make good fertiliser if excrement is meant to be the bad parts and chemicals that the body cant use
In: 7183
There’s a few good reasons for this, but the main one is that plants produce their own energy from sunlight, and can use that energy to build all of the complex molecules they need essentially from scratch.
Manure is very useful to plants because it already contains little fragments of things that they need (mostly Nitrogen compounds) to rebuild larger molecules that are essential for like. Sure they’re smashed to bits by the time they’re in poop, but it’s still much better than breaking N2’s extremely powerful triple bonds that hold nitrogen gas (air) together.
Animals, on the other hand, do not produce their own energy and instead need to eat things they can rip apart and burn (oxidize) for fuel. What we poop out contains whatever is left over after this process that we didn’t need, plus a bunch of complex nitrogen compounds that are broken and no longer useful to us.
Such is the cycle of life
Latest Answers