http://i65.fastpic.ru/big/2014/1217/1b/58b56764f0fc22f8685bd6ada62ca51b.jpg

Grown in Gravel 2014 Edition (The Study of Geological Agriculture) by Richard Campbell
English | July 30, 2014 | ASIN: B00MADIPAC | ISBN-10: 0578142112 | 118 Pages | EPUB/MOBI/AZW3/PDF (Converted) | 50 MB

Geological agriculture is a new science defined as the study of using rocks to grow crops without soil and fertilizer. Commonly known as gravel gardening, this form of crop cultivation will bring significant sustainable agriculture benefits to populations around the world.