By Graham Merrington, Dr Linton Winder Nfa, R. Parkinson, Mark Redman, L. Winder
This entire textual content presents a concise evaluation of environmental difficulties as a result of agriculture (such as pesticide toxins and elevated nitrate degrees) and gives sensible suggestions to them. it's good illustrated and incorporates a fully-referenced creation to the most modern agricultural toxins concerns within the united kingdom. it's going to aid offer transparent, clinical and technical figuring out of an important resources of agricultura pollutants.
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Extra info for Agricultural Pollution Problems and Practical Solutions
Swedes and turnips) (Conway and Pretty, 1991). How much NO3− is in the harvested crop depends upon the amount of fertiliser N added, the crop characteristics and a variety of environmental factors, including season, sunlight and drought. , 1976). g. some meats and cheeses) to which NO3− and nitrite are routinely added as preservatives. , 1995). While organically grown vegetables have higher DM contents and lower NO3− concentrations than those receiving synthetic fertilisers, there is little difference in regard to the parameters which affect sensory assessment and nutrition (Isherwood, 2000).
1999). 9). In each of the zones, which in total cover an area of 600,000 ha, farmers are required to control fertiliser N inputs and ensure the appropriate and timely application of manure. , 2000). These zones are located in areas that are prone to NO3− leaching. For example, they may have sandy or course textured soils overlying unconfined aquifers that are significant sources of drinking water but are at particular risk of exceeding 50 mg NO3−l−1 (Davies, 2000). In contrast to the NSA scheme, the NVZ measures equate to good practice and so there are no financial incentives.
The principle objective of sowing a cover crop must be to establish soil cover as soon as possible, thereby obtaining the maximum autumn growth. Ideally, cover should be established and actively growing by mid-September; sowing any later than mid-October is likely to have little effect on NO3− leaching. , 1997). 36 CHAPTER 2 In Sweden, undersown catch crops, such as a grass crop sown with spring cereals, have been shown to be particularly effective in limiting N leakage. Reductions of 40–50% of leached N were measured from beneath the plots sown with the catch crop when compared with the control tillage treatment.
Agricultural Pollution Problems and Practical Solutions by Graham Merrington, Dr Linton Winder Nfa, R. Parkinson, Mark Redman, L. Winder