Pistachio Shells: A Gardener’s Little-Known Mineral Treasure
The pistachio shell is not inert waste. It is the fruit’s lignocellulosic armor, designed by millennia of evolution to be durable and concentrated in minerals. This biodegradable structure, composed mainly of lignin and cellulose, decomposes slowly in the soil, creating permanent aeration without causing the nitrogen depletion that characterizes fast-decomposing organic matter.
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