Analysis of Solution, Tissue, and Media
Knowledge of the nutritional status of all
components of a soilless culture system is important
for two reasons: (1) it is the only means of judging
how successful management practices have been in
attaining the objectives of the fertilizer program in
terms of the availability of nutrients and the nutrient
levels in the tissue; and (2) it helps diagnose the
causes of any abnormal plant symptoms that may
occur. The costs of this knowledge are a form of
insurance toward success. Periodic laboratory
analysis of the nutrient solution is imperative in
recirculated hydroponic systems, especially if use of
the solution is extended over a period of weeks. It is
equally important in solid-medium systems in order
to evaluate the operation of the fertilizer
proportioner and the preparation of concentrates.