Commercial Hydroponics 3rd Edition by John Mason

By John Mason

How you can develop greens, fruit, reduce plants, herbs and different vegetation hydroponically. This vintage is now re-published with new photos, a brand new structure and revised textual content. vital source for somebody who desires to develop hydropincally.

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This must be taken into consideration when deciding if it is worthwhile reusing the slabs. Hanging Gutter System In the hanging gutter system, PVC gutters (similar to rain gutters) are filled with rockwool. The gutter is supported above the ground by a strong frame, and plants grow on a trellis. Because plants are off the ground, ventilation is very good, which reduces disease prospects. Nutrient solution can be fed into the gutter at the base of each plant with a dripper; any excess nutrient can be run to waste.

Reusing rockwool slabs If the slab hasn’t been penetrated too much by an invasive root system and the previous crops weren’t seriously affected by major root diseases and pests, it can be sterilised and reused. There may be a gradual loss of slab height after slabs have been steam sterilised. This must be taken into consideration when deciding if it is worthwhile reusing the slabs. Hanging Gutter System In the hanging gutter system, PVC gutters (similar to rain gutters) are filled with rockwool.

The nutrient solution is delivered by a micro irrigation tube at the top end and unused solution collects into a return pipe at the bottom. ■■ Black polythene (both sides) has been used, though this will heat up the solution if exposed to the direct sunlight and can ‘cook’ the roots in a young crop over summer. Once the crop grows and begins to shade the plastic this problem disappears. In hot conditions, shading may be used in the interim period until the crop is large enough. ■■ Moisture adheres to the aggregate.

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