Sky Greens Vertical Farm in Singapore; commercial hydroponic farms utilize control systems like iPonic system, to manage and control all equipment.
Soil Testing The Pioneer Way (No Equipment Needed) | Gardening and Homesteading Ideas by Pioneer Settler at http://pioneersettler.com/soil-testing/
Super simple method to root roses! No fancy equipment and great for a kids project. I have had great success with this method, I LOVE it.
Learn how to build an ebb and flow hydroponics system, one of the simplest and cheapest ways to start growing plants in your own home.