Fallow Posted on 11th November 201529th August 2020 by ThePD (The Project Definition) Fallow is to leave land as unseeded or not planted for a period of time in order to improve the soil quality for the future. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in General and tagged improve. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.