Hydroponic Crop Production by Rob Smith

Author:Rob Smith
Language: eng
Format: epub
Tags: hydroponic, hydroponic nutrients, hydroponics how to, hydroponic tomatoes, hydroponic grow systems, hydroponic setup, hydroponic farming, hydroponic lettuce, cropping, hydroponics lighting, hydroponics growing systems
Publisher: Rob Smith

Three methods of fitting microtubes into PVC pipe. While all methods are used, the purpose made rubber grommet fixing results in a far superior, leak proof installation.

The slope required on return drains is minimal, 1:100 generally being quite acceptable, make sure that where ever possible, all feeds and drains are so installed as to allow the contents to completely drain out during a shut down.

The return drains should be laid into a trench which in itself provides a drain for any surface water which will obviously flow down the 1:40 sloped floor. The return drain pipes should be so installed as to prevent any surface water from entering into the nutrient drains which if allowed could be the source of disease contamination, (See drawing) When utilising panda film gullies it is essential that a support wire be installed to allow for the panda to be adequately supported to prevent it from collapsing onto the root mat thereby trapping waste gases and preventing the free access of fresh air (refer chap 7).

When crops are going to be layered (see chap 19) a second wire is installed above the first wire for the purpose of supporting the weight of the stems of the plants so that the panda gully will not be collapsed, these wires can in turn will be tied at intervals along their length, up to the top, crop support wire, to prevent any possible sagging. Various systems have been used for clipping the 'panda' up, over the supporting wire, clothes pegs, ‘Dennison’ clips, etc, my own selection is the standard office stapler, which in my view is as good as any, it is cheap, very fast and easy to use and stainless steel staples are now readily available.

The top end of the gully is folded up, a bit like an envelope, to prevent any leakage. The bottom end is lapped over itself, similar to a dressmakers quilt, and inserted into a 'letter box’ type slot in the return collection drain.

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