Human and animal weirdness.
Reptiles have very inefficient digestive systems so much of the original input remains intact. Would serve the purpose even better than panda at less cost.
Personally, I use a concoction of avian and ungulate manures, rough compost and discretion. Provides all the necessary nutrients, lightens the soil, enhances water retention and is sustainable (30 years so far).
“...secured a patent to grow tea leaves with panda dung.”
What the...?
If any or all of the hundreds of millions of enterprising young folk in China are now either required or allowed to patent the process of using poop to feed plants, then I’m not too worried that they will out-compete us any time soon.
Folks use composted cow manure all the time for their gardens. How is this any different?