In 1860, Julius von Sachs, a prominent German botanist, demonstrated, for the first time, that plants could be grown to maturity in a defined nutrient solution in complete absence of soil. The essence of all these methods involves the culture of plants in a soil-free, defined mineral solution. These methods require purified water and mineral nutrient salts.
Purification of water and nurtients salt is important to rule out other influencing factors. The presence of pure nutrients will give clear cut scientific results. This will help in making a sound basis for the right prediction.
