Nitrogen losses and surface run-off from landspreading of manures : proceedings of a workshop in the EEC Programme of Coordination of Research on Effluents from Livestock, held at the Agricultural Institute, Johnstown Castle Research Centre, Wexford, Ireland, May 20-22, 1980 / sponsored by the Commission of the European Communities, Directorate-General for Agriculture and Directorate-General for Research, Science and Education ; edited by J.C. Brogan.

Includes bibliographical references.

Preface -- SURFACE RUN-OFF SECTION -- SECTION I: SURFACE RUN-OFF -- Nutrient Content of Surface Run-off Water from Land Treated with Animal Wastes / Marie Sherwood and A. Fanning -- The Spreading of Animal Manure without Run-off: the Interest of a Soil Survey / C. Buson -- Landspreading of Animal Manure and Run-off: Comments on the Draft Guidelines / J.H.A.M. Steenvoorden -- Surface Run-off and the Use of Farm Manure / G. Uhlen -- The Influence of Applications of Slurries on Soil Properties Related to Run-off: Experimental Approach in Italy / M. Pagliai and P. Sequi -- The Avoidance of Run-off Problems with Animal Manures and Slurries in the United Kingdom / K.G. Gostick -- Water Pollution Caused by Run-off of Manure and Fertiliser / A. Dam Kofoed -- Discussion of the Proposed Guidelines to Reduce the Pollution of Surface Water by Run-off of Manure and Nutrients from Animal Manure / R. de Borger -- Surface Run-off / H. Vetter and G. Steffens -- Catchment Pollution / P.V. Kiely -- Draft Guidelines for the Prevention of Water Pollution Caused by Run-off of Animal Manures / J.H. Voorburg -- Discussion -- Guidelines for the Prevention of Water Pollution Caused by Run-off of Animal Manures / J.H. Voorburg -- NITROGEN LOSSES SECTION -- SESSION II: CROP UPTAKE -- Crop Uptake of Nitrogen / A. Dam Kofoed -- Nitrogen Uptake by Crop: Grassland / H. Tunney -- Nutrient Uptake from Pig Slurry by a Grass Crop / J.R. O’Callaghan and T.H. Flowers -- Nitrogen Uptake by Crops Manured with Pig Slurry / P. Spallacci -- Nitrogen Uptake by Crops / C. Duthion -- Discussion -- SESSION III: LEACHING OF NITROGEN -- Leaching of Nitrogen in Agriculture / G.J. Kolenbrander -- A Model for the Simulation of the Fate of Nitrogen in Farm Wastes on Land Application / K.K.S. Bhat, T.H. Flowers and J.R. O’Callaghan -- Discussion -- Leaching of Nitrogen After Spreading of Slurry / H. Vetter and G. Steffens -- Discussion -- Leaching of Nitrogen from Animal Manures under Irish Conditions / Marie Sherwood -- Nitrogen Leaching After Spreading Pig Manure / C. Duthion -- Nitrogen Losses by Leaching on Different Soils Manured with Pig Slurry / P. Spallacci -- The Nature and Origin of Leached Nitrogen in Cultivated Land / J. Guiot -- Natural and Artificial Sources of Nitrogen and Phosphate Pollution of Surface Waters in the Netherlands / J.H.A.M. Steenvoorden and H.P. Oosterom -- Introduction to General Discussion / R.J. Dowdell -- Discussion -- SESSION IV: SOIL ORGANIC NITROGEN -- Effect of Animal Manures on Organic Matter and Nitrogen Contents of Soils: A Short Review / G. Catroux -- Organic Nitrogen in the Soil / H. Vetter and G. Steffens -- Accumulation of Organic Nitrogen in Soils after Application to Grassland: Some Studies in England and Wales / K.G. Gostick -- Accumulation of Organic Carbon and Nitrogen in Soil as a Consequence of Pig Slurry Application to Grassland / D. McGrath -- Nitrogen Accumulation in Different Soils after Repeated Applications of Pig Slurry / P. Spallacci -- Mineralisation of Nitrogen as Influenced by Decomposition Rate of Soil Organic Matter / G.J. Kolenbrander -- SESSION V: GASEOUS LOSSES -- Denitrification in Soils Treated with Animal Slurry / R.J. Dowell -- Gaseous N-Losses / H. Vetter and G. Steffens -- Gaseous Nitrogen Losses from Slurry / P.V. Kiely -- Effects of Repeated Landspreading of Pig Slurry on the Nitrifying and Denitrifying Activities in Soils / J.C. Germon and Y. Couton -- Effect of Injection of Animal Waste on Ammonia Losses by Volatilisation on Arable Land and Grassland / G.J. Kolenbrander -- Discussion -- SESSION VI: SUMMARY AND CONCLUSIONS -- Limits to the Spreading of Animal Excrement on Agricultural Land / G.J. Kolenbrander -- Discussion -- List of Participants.

This publication contains the proceedings of a workshop held at the Johnstown Castle, Wexford, Ireland, on 20-22 May, 1980, under the auspices of the Commission of the European Communities as a part of the EEC programme of co-ordination of research on effluents from livestock, and at the request of the Effluents from Livestock Committee. The workshop covered the following topics:

• surface run-off of nitrogen and phosphorus
• nitrogen losses by leaching
• nitrogen losses to the atmosphere
• nitrogen storage in the soil
• nitrogen uptake by the crops

The workshop was structured to ensure a direct comparison between each member country of the experimental results obtained over a three year period, 1977-1979, thus highlighting areas of consensus and uncertainty. Discussion took place on a draft guideline for the landspreading of animal manures - this followed previous discussions in Brussels. Further detailed discussions with individual member countries are planned.

GRETA POINT: 628.193:631.86 INT