Agricultural ecology of savanna: a study of west Africa / Kowal, J. M.

Public ISBD Titre : Agricultural ecology of savanna: a study of west Africa Type de document : texte imprimé Auteurs : Kowal, J. M. ; Kassam, A. H. Mention d'édition : Clarendan Press Editeur : Clarendan Press Année de publication : 1978 ISBN/ISSN/EAN : 978-0-19-859462-8 Note générale : The authors have set out to provide a source of reference for those workers engaged dirctly or indirectly with the development of agriculture and the eficient utilization of natural resources in the savana, especially in the west Africa. The book stresses what is specific or unique in the environment of the west African savannafor eficient crop production and agricultural development therein, and considers some of the important aspects of the transition from traditional agriculture to modern agriculture which involve economic, social and potential considerations. Langues : Anglais (eng) Mots-clés : Agroécologie  Savane  Ressource en eau  Sol  Evaluation  Erosion  Production agricole  Pratique culturale  Produit forestier  Bétail  Climatologie  Agronomie  Génie rural Index. décimale : 631.45 Erosion et lutte anti-érosion 631.46 Résumé : The authors have set out to provide a source of reference for those workers engaged dirctly or indirectly with the development of agriculture and the eficient utilization of natural resources in the savana, especially in the west Africa. The book stresses what is specific or unique in the environment of the west African savannafor eficient crop production and agricultural development therein, and considers some of the important aspects of the transition from traditional agriculture to modern agriculture which involve economic, social and potential considerations. Note de contenu : The authors have set out to provide a source of reference for those workers engaged dirctly or indirectly with the development of agriculture and the eficient utilization of natural resources in the savana, especially in the west Africa. The book stresses what is specific or unique in the environment of the west African savannafor eficient crop production and agricultural development therein, and considers some of the important aspects of the transition from traditional agriculture to modern agriculture which involve economic, social and potential considerations. Agricultural ecology of savanna: a study of west Africa [texte imprimé] / Kowal, J. M. ; Kassam, A. H.  . -  Clarendan Press . - Clarendan Press, 1978. ISBN : 978-0-19-859462-8 The authors have set out to provide a source of reference for those workers engaged dirctly or indirectly with the development of agriculture and the eficient utilization of natural resources in the savana, especially in the west Africa. The book stresses what is specific or unique in the environment of the west African savannafor eficient crop production and agricultural development therein, and considers some of the important aspects of the transition from traditional agriculture to modern agriculture which involve economic, social and potential considerations. Langues : Anglais (eng) Mots-clés : Agroécologie  Savane  Ressource en eau  Sol  Evaluation  Erosion  Production agricole  Pratique culturale  Produit forestier  Bétail  Climatologie  Agronomie  Génie rural Index. décimale : 631.45 Erosion et lutte anti-érosion 631.46 Résumé : The authors have set out to provide a source of reference for those workers engaged dirctly or indirectly with the development of agriculture and the eficient utilization of natural resources in the savana, especially in the west Africa. The book stresses what is specific or unique in the environment of the west African savannafor eficient crop production and agricultural development therein, and considers some of the important aspects of the transition from traditional agriculture to modern agriculture which involve economic, social and potential considerations. Note de contenu : The authors have set out to provide a source of reference for those workers engaged dirctly or indirectly with the development of agriculture and the eficient utilization of natural resources in the savana, especially in the west Africa. The book stresses what is specific or unique in the environment of the west African savannafor eficient crop production and agricultural development therein, and considers some of the important aspects of the transition from traditional agriculture to modern agriculture which involve economic, social and potential considerations.

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Agricultural Meteorology, 12. A simple device for analusing the enrtgy load and intensity of rainstorms / Kowal, J. M.

Public ISBD Titre de série : Agricultural Meteorology, 12 Titre : A simple device for analusing the enrtgy load and intensity of rainstorms Type de document : texte imprimé Auteurs : Kowal, J. M. ; Kijewski, W. ; Kassam, A. H. Année de publication : 1973 ISBN/ISSN/EAN : CI-04512 Note générale : A simple apparatus is described for evaluating the energy load and intensity pf rainstorms relevant to studies of soil erosion and surface run-off. The instrument records graphically, on a time scale, the amplitude of electric pulses originating from the impact of raindrops on the surface of a tansducer dise, by making use of the piezo-electric effect. The size distribution of raindrops is calculated by analysing the graphic records of pulses on the chart from the number and the amplitude of pulses, and from the measured volume of total rainfall. The apparatus can be assembled using commercially available materials and recorders. It combines easy handling with acceptable accuracy. Langues : Anglais (eng) Mots-clés : Agroécologie  Agriculture  Météorologie  Energie  Erosion  Sol  Pluviométrie  Mesure et observation  Méthodologie  Pluie torrentielle Index. décimale : 631.45 Erosion et lutte anti-érosion 631.46 Résumé : A simple apparatus is described for evaluating the energy load and intensity pf rainstorms relevant to studies of soil erosion and surface run-off. The instrument records graphically, on a time scale, the amplitude of electric pulses originating from the impact of raindrops on the surface of a tansducer dise, by making use of the piezo-electric effect. The size distribution of raindrops is calculated by analysing the graphic records of pulses on the chart from the number and the amplitude of pulses, and from the measured volume of total rainfall. The apparatus can be assembled using commercially available materials and recorders. It combines easy handling with acceptable accuracy. Note de contenu : A simple apparatus is described for evaluating the energy load and intensity pf rainstorms relevant to studies of soil erosion and surface run-off. The instrument records graphically, on a time scale, the amplitude of electric pulses originating from the impact of raindrops on the surface of a tansducer dise, by making use of the piezo-electric effect. The size distribution of raindrops is calculated by analysing the graphic records of pulses on the chart from the number and the amplitude of pulses, and from the measured volume of total rainfall. The apparatus can be assembled using commercially available materials and recorders. It combines easy handling with acceptable accuracy. Agricultural Meteorology, 12. A simple device for analusing the enrtgy load and intensity of rainstorms [texte imprimé] / Kowal, J. M. ; Kijewski, W. ; Kassam, A. H. . - 1973. ISSN : CI-04512 A simple apparatus is described for evaluating the energy load and intensity pf rainstorms relevant to studies of soil erosion and surface run-off. The instrument records graphically, on a time scale, the amplitude of electric pulses originating from the impact of raindrops on the surface of a tansducer dise, by making use of the piezo-electric effect. The size distribution of raindrops is calculated by analysing the graphic records of pulses on the chart from the number and the amplitude of pulses, and from the measured volume of total rainfall. The apparatus can be assembled using commercially available materials and recorders. It combines easy handling with acceptable accuracy. Langues : Anglais (eng) Mots-clés : Agroécologie  Agriculture  Météorologie  Energie  Erosion  Sol  Pluviométrie  Mesure et observation  Méthodologie  Pluie torrentielle Index. décimale : 631.45 Erosion et lutte anti-érosion 631.46 Résumé : A simple apparatus is described for evaluating the energy load and intensity pf rainstorms relevant to studies of soil erosion and surface run-off. The instrument records graphically, on a time scale, the amplitude of electric pulses originating from the impact of raindrops on the surface of a tansducer dise, by making use of the piezo-electric effect. The size distribution of raindrops is calculated by analysing the graphic records of pulses on the chart from the number and the amplitude of pulses, and from the measured volume of total rainfall. The apparatus can be assembled using commercially available materials and recorders. It combines easy handling with acceptable accuracy. Note de contenu : A simple apparatus is described for evaluating the energy load and intensity pf rainstorms relevant to studies of soil erosion and surface run-off. The instrument records graphically, on a time scale, the amplitude of electric pulses originating from the impact of raindrops on the surface of a tansducer dise, by making use of the piezo-electric effect. The size distribution of raindrops is calculated by analysing the graphic records of pulses on the chart from the number and the amplitude of pulses, and from the measured volume of total rainfall. The apparatus can be assembled using commercially available materials and recorders. It combines easy handling with acceptable accuracy.

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Agricultural Meteorology, 12. Water use, energy balance and Growth of maize at Samaru, northein Nigeria / Kowal, J. M.

Public ISBD Titre de série : Agricultural Meteorology, 12 Titre : Water use, energy balance and Growth of maize at Samaru, northein Nigeria Type de document : texte imprimé Auteurs : Kowal, J. M. ; Kassam, A. H. Année de publication : 1973 ISBN/ISSN/EAN : CI-04502 Note générale : Energy and water budget of maize crop grown in a dry sub-humid climate of northen Nigeria were assessed and related to crop performance. The pattein ofcrop water availability. The period of maximum water requierements by the crop occured when the leaf area index was greater than 2.1 and coincided with the period when the amount and frequency of rainfall was greatest. However, undr the prevailing climatic conditins, with potential evapotranspiration rates of 4-6 mm per day, the crop may experience water stress, if there is no rain for a period of 5 days or more. The rate of crop growth was drastically reduced when siol water potential decreased below - 0.5 bar. The total water used by the crop during 117 days from sowing to harvest was 486 mm, of wich 345 mm transpired ttrough the plants. Crop water use eficiency was 353g of water per gram of dry matter. Langues : Anglais (eng) Mots-clés : Utilisation de l'eau  Equilibre énergétique  Croissance du maïs  Observation météorologique Index. décimale : 630 Agriculture et techniques connexes Résumé : Energy and water budget of maize crop grown in a dry sub-humid climate of northen Nigeria were assessed and related to crop performance. The pattein ofcrop water availability. The period of maximum water requierements by the crop occured when the leaf area index was greater than 2.1 and coincided with the period when the amount and frequency of rainfall was greatest. However, undr the prevailing climatic conditins, with potential evapotranspiration rates of 4-6 mm per day, the crop may experience water stress, if there is no rain for a period of 5 days or more. The rate of crop growth was drastically reduced when siol water potential decreased below - 0.5 bar. The total water used by the crop during 117 days from sowing to harvest was 486 mm, of wich 345 mm transpired ttrough the plants. Crop water use eficiency was 353g of water per gram of dry matter. Note de contenu : Energy and water budget of maize crop grown in a dry sub-humid climate of northen Nigeria were assessed and related to crop performance. The pattein ofcrop water availability. The period of maximum water requierements by the crop occured when the leaf area index was greater than 2.1 and coincided with the period when the amount and frequency of rainfall was greatest. However, undr the prevailing climatic conditins, with potential evapotranspiration rates of 4-6 mm per day, the crop may experience water stress, if there is no rain for a period of 5 days or more. The rate of crop growth was drastically reduced when siol water potential decreased below - 0.5 bar. The total water used by the crop during 117 days from sowing to harvest was 486 mm, of wich 345 mm transpired ttrough the plants. Crop water use eficiency was 353g of water per gram of dry matter. Agricultural Meteorology, 12. Water use, energy balance and Growth of maize at Samaru, northein Nigeria [texte imprimé] / Kowal, J. M. ; Kassam, A. H. . - 1973. ISSN : CI-04502 Energy and water budget of maize crop grown in a dry sub-humid climate of northen Nigeria were assessed and related to crop performance. The pattein ofcrop water availability. The period of maximum water requierements by the crop occured when the leaf area index was greater than 2.1 and coincided with the period when the amount and frequency of rainfall was greatest. However, undr the prevailing climatic conditins, with potential evapotranspiration rates of 4-6 mm per day, the crop may experience water stress, if there is no rain for a period of 5 days or more. The rate of crop growth was drastically reduced when siol water potential decreased below - 0.5 bar. The total water used by the crop during 117 days from sowing to harvest was 486 mm, of wich 345 mm transpired ttrough the plants. Crop water use eficiency was 353g of water per gram of dry matter. Langues : Anglais (eng) Mots-clés : Utilisation de l'eau  Equilibre énergétique  Croissance du maïs  Observation météorologique Index. décimale : 630 Agriculture et techniques connexes Résumé : Energy and water budget of maize crop grown in a dry sub-humid climate of northen Nigeria were assessed and related to crop performance. The pattein ofcrop water availability. The period of maximum water requierements by the crop occured when the leaf area index was greater than 2.1 and coincided with the period when the amount and frequency of rainfall was greatest. However, undr the prevailing climatic conditins, with potential evapotranspiration rates of 4-6 mm per day, the crop may experience water stress, if there is no rain for a period of 5 days or more. The rate of crop growth was drastically reduced when siol water potential decreased below - 0.5 bar. The total water used by the crop during 117 days from sowing to harvest was 486 mm, of wich 345 mm transpired ttrough the plants. Crop water use eficiency was 353g of water per gram of dry matter. Note de contenu : Energy and water budget of maize crop grown in a dry sub-humid climate of northen Nigeria were assessed and related to crop performance. The pattein ofcrop water availability. The period of maximum water requierements by the crop occured when the leaf area index was greater than 2.1 and coincided with the period when the amount and frequency of rainfall was greatest. However, undr the prevailing climatic conditins, with potential evapotranspiration rates of 4-6 mm per day, the crop may experience water stress, if there is no rain for a period of 5 days or more. The rate of crop growth was drastically reduced when siol water potential decreased below - 0.5 bar. The total water used by the crop during 117 days from sowing to harvest was 486 mm, of wich 345 mm transpired ttrough the plants. Crop water use eficiency was 353g of water per gram of dry matter.

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Agricultural Meteorology. Water use, energy balance and growth of gero millet at Sumaru, notthern Nigeria / Kassam, A. H.

Public ISBD Titre de série : Agricultural Meteorology Titre : Water use, energy balance and growth of gero millet at Sumaru, notthern Nigeria Type de document : texte imprimé Auteurs : Kassam, A. H. ; Kowal, J. M. Mention d'édition : Elsevier Scientific Company Editeur : Elsevier Scientific Company Année de publication : 1975 ISBN/ISSN/EAN : CI-04263 Note générale : Energy and water budget of photo-insensitive millet crop grown in a dry-humid climate of nothern Nigeria were assessed and related to crop performance. The total water used by crop during 85 days from sowing to harvest was 330 mm equivalent to water use efficiency of 148 and 863 g water per gramme dry matter for total dry weigh and grain dry weigh, respectively. Langues : Anglais (eng) Mots-clés : Evapotranspiration  Besoin en eau des plantes  Rayonnement solaire  Productivité agricole  Utilisation de l'eau Index. décimale : 621.47 energie solaire Résumé : Energy and water budget of photo-insensitive millet crop grown in a dry-humid climate of nothern Nigeria were assessed and related to crop performance. The total water used by crop during 85 days from sowing to harvest was 330 mm equivalent to water use efficiency of 148 and 863 g water per gramme dry matter for total dry weigh and grain dry weigh, respectively. Note de contenu : Energy and water budget of photo-insensitive millet crop grown in a dry-humid climate of nothern Nigeria were assessed and related to crop performance. The total water used by crop during 85 days from sowing to harvest was 330 mm equivalent to water use efficiency of 148 and 863 g water per gramme dry matter for total dry weigh and grain dry weigh, respectively. Agricultural Meteorology. Water use, energy balance and growth of gero millet at Sumaru, notthern Nigeria [texte imprimé] / Kassam, A. H. ; Kowal, J. M.  . -  Elsevier Scientific Company . - Elsevier Scientific Company, 1975. ISSN : CI-04263 Energy and water budget of photo-insensitive millet crop grown in a dry-humid climate of nothern Nigeria were assessed and related to crop performance. The total water used by crop during 85 days from sowing to harvest was 330 mm equivalent to water use efficiency of 148 and 863 g water per gramme dry matter for total dry weigh and grain dry weigh, respectively. Langues : Anglais (eng) Mots-clés : Evapotranspiration  Besoin en eau des plantes  Rayonnement solaire  Productivité agricole  Utilisation de l'eau Index. décimale : 621.47 energie solaire Résumé : Energy and water budget of photo-insensitive millet crop grown in a dry-humid climate of nothern Nigeria were assessed and related to crop performance. The total water used by crop during 85 days from sowing to harvest was 330 mm equivalent to water use efficiency of 148 and 863 g water per gramme dry matter for total dry weigh and grain dry weigh, respectively. Note de contenu : Energy and water budget of photo-insensitive millet crop grown in a dry-humid climate of nothern Nigeria were assessed and related to crop performance. The total water used by crop during 85 days from sowing to harvest was 330 mm equivalent to water use efficiency of 148 and 863 g water per gramme dry matter for total dry weigh and grain dry weigh, respectively.

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Climatic adaptability of crops / Kassam, A. H.

Public ISBD Titre : Climatic adaptability of crops Type de document : texte imprimé Auteurs : Kassam, A. H. ; Kowal, J. M. ; Sarrof, S. Mention d'édition : FAO Editeur : FAO Année de publication : 1977 ISBN/ISSN/EAN : CI-02515 Note générale : This report deals with the interrelationships between climatic facteurs and crop characteristics in terms of climatic adaptability of crops and productivity for agriculture. Mots-clés : Production agricole  Photosynthèse  Recolte  Rendement agricole  Agronomie  Adaptation climatique  Agronomie tropicale Index. décimale : 551.6 Climatologie et temps Résumé : This report deals with the interrelationships between climatic facteurs and crop characteristics in terms of climatic adaptability of crops and productivity for agriculture. Note de contenu : This report deals with the interrelationships between climatic facteurs and crop characteristics in terms of climatic adaptability of crops and productivity for agriculture. Climatic adaptability of crops [texte imprimé] / Kassam, A. H. ; Kowal, J. M. ; Sarrof, S.  . -  FAO . - FAO, 1977. ISSN : CI-02515 This report deals with the interrelationships between climatic facteurs and crop characteristics in terms of climatic adaptability of crops and productivity for agriculture. Mots-clés : Production agricole  Photosynthèse  Recolte  Rendement agricole  Agronomie  Adaptation climatique  Agronomie tropicale Index. décimale : 551.6 Climatologie et temps Résumé : This report deals with the interrelationships between climatic facteurs and crop characteristics in terms of climatic adaptability of crops and productivity for agriculture. Note de contenu : This report deals with the interrelationships between climatic facteurs and crop characteristics in terms of climatic adaptability of crops and productivity for agriculture.

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Cotton Grow. Rev.. Cotton production in Northern states of Nigeria in relation of water availability and crop water use / Kowal, J. M.

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Outlook on Agriculture. Improving food crop production in the Sudan savanna zone of northern Nigeria / Kassam, A. H.

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Report on research proposals for the soil physics and soil chemistry sections of the savana forestry research station Samaru / Kowal, J. M.

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Samaru Miscellaneous Paper, 13. Some preliminary observations on the performance of sugar-cane at agricultural irrigation research station, Kpong, Ghana / Kowal, J. M.

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Samaru Research bulletin 229, 229. Rainfall in the Sudan savana region of Nigeria / Kowal, J. M.

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Savana, 1. Productivity of crops in the savana and rain forest zones in Nigeria / Kassoum, A. H.

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Savana, 2. An assessment pf aridity and the severity of the 1972 drough in northern Nigeria and Neigh bouring countries / Kowal, J. M.

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Sawanna, 2. An appraisal of drought in 1973 affecting groundnut production in the Guinea and Sudan sawanna areas of Nigeria / Kowal, J. M.

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Trop. Agric., 3. Energy load and instantaneous intensity of rainstorms at Samaru, Northem Nigeria / Kowal, J. M.

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Tropical Agriculture. Water use and growth of groundnut, at Samaru, Northern Nigeria / Kassam, A. H.

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