eli5 : If plants can make their food with water and carbon dioxide using photosynthesis why do they need manure and fertilisers ?

Question

eli5 : If plants can make their food with water and carbon dioxide using photosynthesis why do they need manure and fertilisers ?

In: Biology

Answer 1

They work better in soil that has those trace chemicals. Agriculture isn’t about leaving plants alone to do their thing, it’s about maximizing the yield produced by the plants.