The Diviner™ accurately measures soil-water content across the full range of soil moisture conditions through a portable inserted into an access tubes in the ground.

Some of the features of the Diviner 2000™:

• Uses the same sensor and access tube as EnviroSCAN™
• Accuracy better than 1% of Volumetric Soil water content
• Alarm system to detect presence of water in the access tube
• Repeatability of readings
• Patented, automatic depth recognition
• Smooth continuous insertion and removal of sensors for automatic logging at each depth (no need to pause - up to 16 depths reading in less than 2 seconds)
• Large display featuring numeric or graphical output (can be read in sunlight, or backlit for those who work the long hours)
• No computer necessary, but data can be saved to a PC and viewed.

Diviner 2000 consists of a hand-held, portable data logger display unit, connected by cable to a depth-scaled probe rod with sensor attached.

Additional requirements are in the form of installation kits, which comprise the following:

• Access tubes, Top cap (to prevent ingress of moisture)
• Bottom stopper (to seal access tubes)
  

Sphere of influence is critical to the correct understanding and management of water in a profile. If it is too large there is too much averaging, and if too small there are inaccuracies with too little coverage. Diviner 2000 has a sphere of influence typically 4 inches (10cm) into the horizontal plane of the soil profile, giving extremely accurate management information.

The EnviroSCAN™ and Diviner 2000™ are not affected by the following:

Sentek provides a standard 'default' calibration equation for sands, loams and clay loams. Sentek points out that the accuracy of the existing EnviroSCAN standard default calibration with an R2 value of 0.9737. Climate inside the PVC access tubes can be controlled by silicon bags and the new Diviner 2000 has an alarm system with alert operates of ingress of water into the access tubes.

The following two graphs show the sort of graphs that can be produced from Diviner data taken every few days. The more often the readings are taken the better the graphs and the easier to interpret.

These next two graphs are an example of the detail you can get by taking readings more often. They are from drip irrigated potatoes, showing how the soil was filled in the top 20cm for scab control and then as the crop rooted deeper the watering was kept in the top 20cm only. This strategy was used by the grower, but it does not mean this is necessarily the best way according to Peter White Water Management.
This next graph is a perfect example of good water management - the grower did his own trials - after advice from Peter White water Management, proved to himself the way to water and then this is what he does - you should be doing the same!

An excellent tool if used regularly and with suitable training and support.

There are many excellent growers using this equipment:

• A W Mortier Farms Ltd. Suffolk.
• Wm Kerr Farms Ltd, Suffolk.
• R H & R Pauls, Suffolk.
• Mann Potatoes, Suffolk.
• Notcutts Nurseries Ltd, Suffolk.
• G's, Norfolk.
• G's Salads, Cambs
• Brooms Barn Experimental Station, Suffolk.
• ADAS Gleadthorpe, Nottinghamshire.
• Silsoe Soil Survey and Research, Bedfordshire.
• Bomfords, Worcestershire.
• Oakley Irrigation Ltd, Shropshire.
• Chris Kitchen, Lincolnshire.
• Roger Rendall, Essex.
• Stangroom Brothers, Norfolk.
• James Goring, Hereffordshire.
• Peter Stirling Ltd, Arbroath, Scotland.
• Tio Ltd, Inverness, Scotland.
• HRI Wellesbourne, Warwickshire.
• Hereward Growers Group in the Shotley Peninsular, Suffolk.
• Martin Parkes, consultant, Scotland.
• Vegetable Consultancy Services. Norfolk.
• Wroot Irrigation, Wroot, Lincolnshire.
• Banjo Potatoes, Devon
• S&A Produce, Hereford, Herefordshire.
• David Langmead, Chichester, Sussex.
• Martin Parkes, Consultant, Scotland.
• Chambers Farming, Rushford Estate, Suffolk.
• E.S. Black Ltd and Associates, Coldstream, Scotland.
• G.R. Ward Ltd, Tim Deans
• Branston Potatoes, Lincolnshire.
• David Norman, March. (Agronomist)
• A Hammond, Nottingham.
• J E Piccavar Co. Ltd, Holbeach.
• A Rockcliffe, Kings Lynn.
• SAC Scotland
• Harper Adams University
• North Norfolk Potatoes
• Silsoe College
• G.H.Emerson and Son, Boston
• Richard Austin Associates
• T Redsall Kent
• Langmead Farms Ltd
• A Howard, Notts
• Farmspeed, Norfolk
• CWS Broadoak, Goole Estate

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