Soil and Hydroponics

Scientifically speaking, plant growth in any rooting medium, including soil, is hydroponic, since the elements absorbed by plant roots must be in a water-based solution. The concentration and movement of the elements within this solution depend on the nature of the surrounding medium. For example, in soil, the soil solution and its elemental composition are the result of many interacting factors an ever-changing, dynamic system of complex equilibrium chemistry (Lindsay, 1979 Tan, 1998 Peverill...

How Plants Grow

The ancient thinkers wondered about how plants grow. They concluded that plants obtained nourishment from the soil, calling it a particular juyce existent in the soil for use by plants. In the 16th century, van Helmont regarded water as the sole nutrient for plants. He came to this conclusion after conducting the following experiment Growing a willow in a large carefully weighed tub of soil, van Helmont observed at the end of the experiment that only 2 ounces of soil was lost during the period...

Its Roles and Functions

Plant roots have two major functions They physically anchor the plant to the growing medium. They are the avenue through which water and ions enter into the plant for redistribution to all parts of the plant. Although the first role given above is important, it is the second role that deserves our attention in this discussion. The book edited by Carson 1974 provides detailed information on plant roots and their many important functions, and the book chapter by Wignarajah 1994 discusses the...

Hydroponics Information

This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission, and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information, but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. Neither this book nor any part may be reproduced or transmitted in any form or by any...

Inert Soil Definition

The word hydroponics has its derivation from the combining of two Greek words, hydro meaning water and ponos meaning labor, i.e., working water. The word first appeared in a scientific magazine article Science, Feb 178 1 published in 1937 and authored by W.F. Gericke, who had accepted this word as was suggested by Dr. W.A. Setchell at the University of California. Dr. Gericke began experimenting with hydroponic growing techniques in the late 1920s and then published one of the early books on...