https://www.theguardian.com/environment/2019/jul/13/pigs-radical-farming-system-trees-climate-crisis?CMP=share_btn_fb&fbclid=IwAR0obgCf9f4c4oEkxQrljg_F0xGueqonP4gOofxWfKA-jnOqeaqZNZBtMMI
Sowing and harvesting together
https://www.theguardian.com/environment/2019/jul/13/pigs-radical-farming-system-trees-climate-crisis?CMP=share_btn_fb&fbclid=IwAR0obgCf9f4c4oEkxQrljg_F0xGueqonP4gOofxWfKA-jnOqeaqZNZBtMMI