Book 5. Hydroponic Systems

Leonardo da Vinci (1452 - 1519) stated: “Water is as if it were the soul of plants, as mineral elements are as if the soul of soil.”
By the end of this century, farmers will need to produce double the amount of food using much less water, energy and labour; and on smaller land areas while facing sharp increases in the cost of energy, labour, mechanisation, fertilisers, etc.
Hydroponics (Nutrient Culture) is a method of growing plants without soil, which can solve these challenges).