watercress & chalk stream headwaters charles barter chairman, nfu watercress association 13 june...
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Watercress &
Chalk Stream Headwaters
Charles Barter
Chairman, NFU Watercress Association
13 June 2007
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NFU Watercress Association
• Formed in 1936 under the Hertfordshire branch of the NFU
• Objective is to regulate, protect and promote the watercress industry
• Watercress Festival
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History
• Watercress has been farmed commercially in England for almost 200 years
• 2008 is the bi-centenary of the first commercial watercress farm
• Watercress has been farmed from the Test & Itchen for over 150 years
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Abstraction or Augmentation?
• All sites originally fed by natural springs or artesian boreholes
• Lowering of groundwater by consumptive abstractions has led to a number of farms now incurring pumping costs
• Outflows from watercress farms augment receiving waters
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The Rural Economy
• Over 50% of UK watercress is grown in Hampshire on the headwaters of the Test & Itchen
• The watercress industry is worth over £50m at retail
• Over 500 rural jobs dependent on the industry
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Nature’s Superfood
• More vitamin C than oranges; calcium than whole milk; iron than spinach etc
• PEITC – confers unique and powerful anti-cancer properties to watercress
• A real and significant impact upon the health of the nation
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Impact on Receiving Waters
• Positive in terms of augmenting flow and decreasing nitrate load
• Past concern re the industry’s use of pesticides, zinc and release of silt
• Concern now focuses on phosphates
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Watercress and Phosphates
• Groundwater contains insufficient P to grow watercress
• Traditionally supplied by basic slag
• Since mid 1980s supplied by slow release fertilisers such as Fibrophos
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• NFU Watercress Growers’ Association has commissioned work by ADAS to identify and refine best practice use of phosphate fertilisers
• The Association is re-writing its Code of Practice, incorporating phosphate control requirements
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Watercress and Invertebrates
• Caddis and Gammarus thrive in undisturbed watercress beds
• Repeat cropping / bed cleaning significantly reduces populations on and below farms
• Work sponsored by Vitacress has clearly demonstrated the causal factor is the mustard oil, PEITC
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• PEITC breaks down quickly. Most farms have settlement lagoons
• Farms without lagoons may need to consider reed beds / wetlands – await outcome of Pete Shaw’s work with interest
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Other Issues
• Diverse Pollution
• Effects caused by increasing number of swans
• Overseas Watercress Production
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In Summary
• Watercress farming is an historic and key element of the Test & Itchen’s upper headwaters
• Watercress is important to the rural economy and to the health of the nation
• Farmed responsibly watercress is an asset to the river system