Technical Bulletin, 114. Natural and artificial sources of nitrogen and phosphate pollution of waters in the Netherlands surface / Steenvoorden, J. H. A. M.

Public ISBD Titre de série : Technical Bulletin, 114 Titre : Natural and artificial sources of nitrogen and phosphate pollution of waters in the Netherlands surface Type de document : texte imprimé Auteurs : Steenvoorden, J. H. A. M. ; Oosterom, H. P. Mention d'édition : ILWMR IVCW Editeur : ILWMR IVCW Année de publication : 1979 ISBN/ISSN/EAN : CI-08773 Note générale : Nitrogen and phosphate pollution of surface water by various potential sources is discussed in general attention is paid to the more or less natural sources: precipitation, leaching of natural soil constituents, seepage of saline groundwater and to the artificial sources: domestic waste water, inlet water from storage canals, leaching of fertilizers, surface runoff and discharge of dune water. For three polders and three book catchmont areas the total nitrogen and phosphate load has been calculated. Polders and catchmant areas differ with respect to the geo - hydrological situation, soil,type, agricultural soil use and population density. In the sandy soil of the brook cathment areas on the other hand, the nitrogen pollution originates for the largest part from scattered agricultural sources. The contribution to the phosphate laod by domestic sewage depends on the population density and the treatment method of waste water, out generally speaking it is an important factor. Langues : Anglais (eng) Mots-clés : Pollution  Eau de surface  Phosphate  Géologie  Hydrologie  Eau souterraine  Fertilisation  Nitrogène Index. décimale : 363.73 Pollution Résumé : Nitrogen and phosphate pollution of surface water by various potential sources is discussed in general attention is paid to the more or less natural sources: precipitation, leaching of natural soil constituents, seepage of saline groundwater and to the artificial sources: domestic waste water, inlet water from storage canals, leaching of fertilizers, surface runoff and discharge of dune water. For three polders and three book catchmont areas the total nitrogen and phosphate load has been calculated. Polders and catchmant areas differ with respect to the geo - hydrological situation, soil,type, agricultural soil use and population density. In the sandy soil of the brook cathment areas on the other hand, the nitrogen pollution originates for the largest part from scattered agricultural sources. The contribution to the phosphate laod by domestic sewage depends on the population density and the treatment method of waste water, out generally speaking it is an important factor. Note de contenu : Nitrogen and phosphate pollution of surface water by various potential sources is discussed in general attention is paid to the more or less natural sources: precipitation, leaching of natural soil constituents, seepage of saline groundwater and to the artificial sources: domestic waste water, inlet water from storage canals, leaching of fertilizers, surface runoff and discharge of dune water. For three polders and three book catchmont areas the total nitrogen and phosphate load has been calculated. Polders and catchmant areas differ with respect to the geo - hydrological situation, soil,type, agricultural soil use and population density. In the sandy soil of the brook cathment areas on the other hand, the nitrogen pollution originates for the largest part from scattered agricultural sources. The contribution to the phosphate laod by domestic sewage depends on the population density and the treatment method of waste water, out generally speaking it is an important factor. Technical Bulletin, 114. Natural and artificial sources of nitrogen and phosphate pollution of waters in the Netherlands surface [texte imprimé] / Steenvoorden, J. H. A. M. ; Oosterom, H. P.  . -  ILWMR IVCW . - ILWMR IVCW, 1979. ISSN : CI-08773 Nitrogen and phosphate pollution of surface water by various potential sources is discussed in general attention is paid to the more or less natural sources: precipitation, leaching of natural soil constituents, seepage of saline groundwater and to the artificial sources: domestic waste water, inlet water from storage canals, leaching of fertilizers, surface runoff and discharge of dune water. For three polders and three book catchmont areas the total nitrogen and phosphate load has been calculated. Polders and catchmant areas differ with respect to the geo - hydrological situation, soil,type, agricultural soil use and population density. In the sandy soil of the brook cathment areas on the other hand, the nitrogen pollution originates for the largest part from scattered agricultural sources. The contribution to the phosphate laod by domestic sewage depends on the population density and the treatment method of waste water, out generally speaking it is an important factor. Langues : Anglais (eng) Mots-clés : Pollution  Eau de surface  Phosphate  Géologie  Hydrologie  Eau souterraine  Fertilisation  Nitrogène Index. décimale : 363.73 Pollution Résumé : Nitrogen and phosphate pollution of surface water by various potential sources is discussed in general attention is paid to the more or less natural sources: precipitation, leaching of natural soil constituents, seepage of saline groundwater and to the artificial sources: domestic waste water, inlet water from storage canals, leaching of fertilizers, surface runoff and discharge of dune water. For three polders and three book catchmont areas the total nitrogen and phosphate load has been calculated. Polders and catchmant areas differ with respect to the geo - hydrological situation, soil,type, agricultural soil use and population density. In the sandy soil of the brook cathment areas on the other hand, the nitrogen pollution originates for the largest part from scattered agricultural sources. The contribution to the phosphate laod by domestic sewage depends on the population density and the treatment method of waste water, out generally speaking it is an important factor. Note de contenu : Nitrogen and phosphate pollution of surface water by various potential sources is discussed in general attention is paid to the more or less natural sources: precipitation, leaching of natural soil constituents, seepage of saline groundwater and to the artificial sources: domestic waste water, inlet water from storage canals, leaching of fertilizers, surface runoff and discharge of dune water. For three polders and three book catchmont areas the total nitrogen and phosphate load has been calculated. Polders and catchmant areas differ with respect to the geo - hydrological situation, soil,type, agricultural soil use and population density. In the sandy soil of the brook cathment areas on the other hand, the nitrogen pollution originates for the largest part from scattered agricultural sources. The contribution to the phosphate laod by domestic sewage depends on the population density and the treatment method of waste water, out generally speaking it is an important factor.

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Technical Bulletin. An integrated model approach to the effect of water management on crop yield / Feddes, R. A.

Public ISBD Titre de série : Technical Bulletin Titre : An integrated model approach to the effect of water management on crop yield Type de document : texte imprimé Auteurs : Feddes, R. A. ; Wijk, A. L. M. (van) Mention d'édition : ILWMR IVCW Editeur : ILWMR IVCW Année de publication : 1977 ISBN/ISSN/EAN : CI-09440 Note générale : Quanttifying the effectof drainage on crop yield is of essential importance in agricultural management. In this article a model is described with which this effect can be computed for both arable land and grassland, the factor acting in spring, summer and autumn are deal with separately arable land. In spring sowing date is the main factor affecting the crop yield. Sowing date depends to the village conditions of the soil to player. In autumn crop yield is influenced by the working conditions during harvest yields are derived from an experimental relationship between yield depression and number of days of earlier harvesting grassland. The effect of shallow groundwater table depths in winter and spring an the yield of the first and second cut can be determined with the workability model in an identical manner to that given for arable land. An example representative for the Netherlands is given for grass on peat soil. Langues : Anglais (eng) Mots-clés : Agriculture  Récolte  Drainage  Modèle mathématique  Simulation  Eau souterraine  Agroécologie Index. décimale : 630 Agriculture et techniques connexes Résumé : Quanttifying the effectof drainage on crop yield is of essential importance in agricultural management. In this article a model is described with which this effect can be computed for both arable land and grassland, the factor acting in spring, summer and autumn are deal with separately arable land. In spring sowing date is the main factor affecting the crop yield. Sowing date depends to the village conditions of the soil to player. In autumn crop yield is influenced by the working conditions during harvest yields are derived from an experimental relationship between yield depression and number of days of earlier harvesting grassland. The effect of shallow groundwater table depths in winter and spring an the yield of the first and second cut can be determined with the workability model in an identical manner to that given for arable land. An example representative for the Netherlands is given for grass on peat soil. Note de contenu : Quanttifying the effectof drainage on crop yield is of essential importance in agricultural management. In this article a model is described with which this effect can be computed for both arable land and grassland, the factor acting in spring, summer and autumn are deal with separately arable land. In spring sowing date is the main factor affecting the crop yield. Sowing date depends to the village conditions of the soil to player. In autumn crop yield is influenced by the working conditions during harvest yields are derived from an experimental relationship between yield depression and number of days of earlier harvesting grassland. The effect of shallow groundwater table depths in winter and spring an the yield of the first and second cut can be determined with the workability model in an identical manner to that given for arable land. An example representative for the Netherlands is given for grass on peat soil. Technical Bulletin. An integrated model approach to the effect of water management on crop yield [texte imprimé] / Feddes, R. A. ; Wijk, A. L. M. (van)  . -  ILWMR IVCW . - ILWMR IVCW, 1977. ISSN : CI-09440 Quanttifying the effectof drainage on crop yield is of essential importance in agricultural management. In this article a model is described with which this effect can be computed for both arable land and grassland, the factor acting in spring, summer and autumn are deal with separately arable land. In spring sowing date is the main factor affecting the crop yield. Sowing date depends to the village conditions of the soil to player. In autumn crop yield is influenced by the working conditions during harvest yields are derived from an experimental relationship between yield depression and number of days of earlier harvesting grassland. The effect of shallow groundwater table depths in winter and spring an the yield of the first and second cut can be determined with the workability model in an identical manner to that given for arable land. An example representative for the Netherlands is given for grass on peat soil. Langues : Anglais (eng) Mots-clés : Agriculture  Récolte  Drainage  Modèle mathématique  Simulation  Eau souterraine  Agroécologie Index. décimale : 630 Agriculture et techniques connexes Résumé : Quanttifying the effectof drainage on crop yield is of essential importance in agricultural management. In this article a model is described with which this effect can be computed for both arable land and grassland, the factor acting in spring, summer and autumn are deal with separately arable land. In spring sowing date is the main factor affecting the crop yield. Sowing date depends to the village conditions of the soil to player. In autumn crop yield is influenced by the working conditions during harvest yields are derived from an experimental relationship between yield depression and number of days of earlier harvesting grassland. The effect of shallow groundwater table depths in winter and spring an the yield of the first and second cut can be determined with the workability model in an identical manner to that given for arable land. An example representative for the Netherlands is given for grass on peat soil. Note de contenu : Quanttifying the effectof drainage on crop yield is of essential importance in agricultural management. In this article a model is described with which this effect can be computed for both arable land and grassland, the factor acting in spring, summer and autumn are deal with separately arable land. In spring sowing date is the main factor affecting the crop yield. Sowing date depends to the village conditions of the soil to player. In autumn crop yield is influenced by the working conditions during harvest yields are derived from an experimental relationship between yield depression and number of days of earlier harvesting grassland. The effect of shallow groundwater table depths in winter and spring an the yield of the first and second cut can be determined with the workability model in an identical manner to that given for arable land. An example representative for the Netherlands is given for grass on peat soil.

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