New Table of Contents

• Survey of Literature and Experience on the Disposal of Sewage Sludge on Land

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• Summary

• . Background to the Doyle Report

• 2. Potential Benefits to be Derived from the Utilisation of Sewage Sludges on Agricultural Land

• 2.1. Soil Structure

• 2.2 Manurial Value

• 2.3 Soil Fertility

• 2.4 Crop Yields

• 3. Potentially Toxic Elements in Sewage Sludges, Occurrence in Soils and Sludges and Assimilation by Food Crops

• 3(a) Effect of Soil Properties

• 3.1 Cadmium

• Vegetable Crops

• Grass and Cereal Crops

• Soil Properties Affecting the Availability of Cadmium to Plants

• 3.2 Lead

•              Vegetable Crops

• Grass and Cereal Crops

• Soil Properties Affecting the Availability of Lead to Plants

• 3.3 Zinc

•               Vegetable Crops

• Grass and Cereal Crops

• Soil Properties Affecting the Availability of Zinc to Plants

• 3.4 Copper

• Vegetable Crops

• Grass and Cereal Crops

• Soil Properties Affecting the Availability of Copper to Plants

• 3.5 Nickel

• 3.6 Metal Availability

• 3.7 - Arsenic

• 3.8 Silver

• 3.9 Barium

• 3.10 Beryllium

• 3.11 Bismuth

• 3.12 Boron

• 3.13 Cobalt

• 3.14 Chromium

• 3.15 Mercury

• 3.16 Manganese

• 3.17 Molybdenum

• 3.18 Selenium

• 3.19 Tin

• 3.20 Vanadium

• 4. Review of Current Practices and Past Experience of the Disposal of Sewage Sludge to Agricultural Land in the United Kingdom

• 4.1 Application of Sludge to Land

• 4.2 Monitoring of Sludges

• 4.3 Monitoring of Soils and Crops

• 4.4 Practical Implication of Guidelines for Sewage Sludge Disposal to Agricultural Land

• 4.5 Farmers Views and Comments

• 5. Conclusions

• 6. Recommendations

• 6.7 Research into the following topics is urgently required.

• 6. Bibliography