An agroclimatological atlas of the northerm states of Nigeria , with explanatory notes / Kowal, J.

Public ISBD Titre : An agroclimatological atlas of the northerm states of Nigeria , with explanatory notes Type de document : texte imprimé Auteurs : Kowal, J. ; Knabe, D. T. Mention d'édition : Ahmadou Bello University Press Editeur : Ahmadou Bello University Press Année de publication : 1972 ISBN/ISSN/EAN : CI-11641 Note générale : The objectif of this study is to provide a conciste account of the climatic ressources in the six northern states pertinent to the development of agriculture. The study is intented in the first instance to provide detailed tables and maps showing amongst other important agronomic parameters: the pattern of radiation temperature and potential photosynthesis,/ the amount seasonal distribution and reliability of rainfall / variation and patterns in potential evapotranspiration/ the start/ the end and the duration of rains/ length of the growing season annual water budget. Langues : Anglais (eng) Mots-clés : Agroécologie  Climatologie  Géographie  Géologie  Végétation  Pluviométrie  Population  precipitations  Evapotranspiration  Eau  Budget  Atlas  Radiation Index. décimale : 551.6 Climatologie et temps Résumé : The objectif of this study is to provide a conciste account of the climatic ressources in the six northern states pertinent to the development of agriculture. The study is intented in the first instance to provide detailed tables and maps showing amongst other important agronomic parameters: the pattern of radiation temperature and potential photosynthesis,/ the amount seasonal distribution and reliability of rainfall / variation and patterns in potential evapotranspiration/ the start/ the end and the duration of rains/ length of the growing season annual water budget. Note de contenu : The objectif of this study is to provide a conciste account of the climatic ressources in the six northern states pertinent to the development of agriculture. The study is intented in the first instance to provide detailed tables and maps showing amongst other important agronomic parameters: the pattern of radiation temperature and potential photosynthesis,/ the amount seasonal distribution and reliability of rainfall / variation and patterns in potential evapotranspiration/ the start/ the end and the duration of rains/ length of the growing season annual water budget. An agroclimatological atlas of the northerm states of Nigeria , with explanatory notes [texte imprimé] / Kowal, J. ; Knabe, D. T.  . -  Ahmadou Bello University Press . - Ahmadou Bello University Press, 1972. ISSN : CI-11641 The objectif of this study is to provide a conciste account of the climatic ressources in the six northern states pertinent to the development of agriculture. The study is intented in the first instance to provide detailed tables and maps showing amongst other important agronomic parameters: the pattern of radiation temperature and potential photosynthesis,/ the amount seasonal distribution and reliability of rainfall / variation and patterns in potential evapotranspiration/ the start/ the end and the duration of rains/ length of the growing season annual water budget. Langues : Anglais (eng) Mots-clés : Agroécologie  Climatologie  Géographie  Géologie  Végétation  Pluviométrie  Population  precipitations  Evapotranspiration  Eau  Budget  Atlas  Radiation Index. décimale : 551.6 Climatologie et temps Résumé : The objectif of this study is to provide a conciste account of the climatic ressources in the six northern states pertinent to the development of agriculture. The study is intented in the first instance to provide detailed tables and maps showing amongst other important agronomic parameters: the pattern of radiation temperature and potential photosynthesis,/ the amount seasonal distribution and reliability of rainfall / variation and patterns in potential evapotranspiration/ the start/ the end and the duration of rains/ length of the growing season annual water budget. Note de contenu : The objectif of this study is to provide a conciste account of the climatic ressources in the six northern states pertinent to the development of agriculture. The study is intented in the first instance to provide detailed tables and maps showing amongst other important agronomic parameters: the pattern of radiation temperature and potential photosynthesis,/ the amount seasonal distribution and reliability of rainfall / variation and patterns in potential evapotranspiration/ the start/ the end and the duration of rains/ length of the growing season annual water budget.

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Conference Paper. National evater budget in the six northern states of Nigeria / Kowal, J.

Public ISBD Titre de série : Conference Paper Titre : National evater budget in the six northern states of Nigeria Type de document : texte imprimé Auteurs : Kowal, J. Mention d'édition : Institute for Agriculture Research Editeur : Institute for Agriculture Research Année de publication : 1972 ISBN/ISSN/EAN : CI-05679 Note générale : The present paper attempts to assess the water budget in the six northern states by means of water budget accountring. The assessment excludes water supplied by rivers flowing into Nigeria from neighbouring countries or supplies which could be drawn from lake chad or artesian wells Langues : Anglais (eng) Mots-clés : Budget  Evaluation  Ressource en eau  PRECIPITATIONS  Evaporation  Politique de l'eau Index. décimale : 658.15 Gestion financière, capital, investissements, budget Résumé : The present paper attempts to assess the water budget in the six northern states by means of water budget accountring. The assessment excludes water supplied by rivers flowing into Nigeria from neighbouring countries or supplies which could be drawn from lake chad or artesian wells Note de contenu : The present paper attempts to assess the water budget in the six northern states by means of water budget accountring. The assessment excludes water supplied by rivers flowing into Nigeria from neighbouring countries or supplies which could be drawn from lake chad or artesian wells Conference Paper. National evater budget in the six northern states of Nigeria [texte imprimé] / Kowal, J.  . -  Institute for Agriculture Research . - Institute for Agriculture Research, 1972. ISSN : CI-05679 The present paper attempts to assess the water budget in the six northern states by means of water budget accountring. The assessment excludes water supplied by rivers flowing into Nigeria from neighbouring countries or supplies which could be drawn from lake chad or artesian wells Langues : Anglais (eng) Mots-clés : Budget  Evaluation  Ressource en eau  PRECIPITATIONS  Evaporation  Politique de l'eau Index. décimale : 658.15 Gestion financière, capital, investissements, budget Résumé : The present paper attempts to assess the water budget in the six northern states by means of water budget accountring. The assessment excludes water supplied by rivers flowing into Nigeria from neighbouring countries or supplies which could be drawn from lake chad or artesian wells Note de contenu : The present paper attempts to assess the water budget in the six northern states by means of water budget accountring. The assessment excludes water supplied by rivers flowing into Nigeria from neighbouring countries or supplies which could be drawn from lake chad or artesian wells

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Journal of Soil and Water Conservation. Usefulness of ridge cultivation in Nigerian agriculture / Kowal, J.

Public ISBD Titre de série : Journal of Soil and Water Conservation Titre : Usefulness of ridge cultivation in Nigerian agriculture Type de document : texte imprimé Auteurs : Kowal, J. ; Stockinger, K. Année de publication : may -june 1973 ISBN/ISSN/EAN : CI-04171 Note générale : This article is a contribution from the institute, USDA, and USDA/Aid major cereals west african project. Crops in Nigeria traditionally are grown on ridges, occasionally on hills, and in frequently on flat cultivated land. The pratice of ridge cropping is not related to climate, soils, or topography and is only partly dictated by crop requirements. Mots-clés : Agriculture  Montagne  Recolte  Productivité agricole  Céréale Index. décimale : 630 Agriculture et techniques connexes Résumé : This article is a contribution from the institute, USDA, and USDA/Aid major cereals west african project. Crops in Nigeria traditionally are grown on ridges, occasionally on hills, and in frequently on flat cultivated land. The pratice of ridge cropping is not related to climate, soils, or topography and is only partly dictated by crop requirements. Note de contenu : This article is a contribution from the institute, USDA, and USDA/Aid major cereals west african project. Crops in Nigeria traditionally are grown on ridges, occasionally on hills, and in frequently on flat cultivated land. The pratice of ridge cropping is not related to climate, soils, or topography and is only partly dictated by crop requirements. Journal of Soil and Water Conservation. Usefulness of ridge cultivation in Nigerian agriculture [texte imprimé] / Kowal, J. ; Stockinger, K. . - may -june 1973. ISSN : CI-04171 This article is a contribution from the institute, USDA, and USDA/Aid major cereals west african project. Crops in Nigeria traditionally are grown on ridges, occasionally on hills, and in frequently on flat cultivated land. The pratice of ridge cropping is not related to climate, soils, or topography and is only partly dictated by crop requirements. Mots-clés : Agriculture  Montagne  Recolte  Productivité agricole  Céréale Index. décimale : 630 Agriculture et techniques connexes Résumé : This article is a contribution from the institute, USDA, and USDA/Aid major cereals west african project. Crops in Nigeria traditionally are grown on ridges, occasionally on hills, and in frequently on flat cultivated land. The pratice of ridge cropping is not related to climate, soils, or topography and is only partly dictated by crop requirements. Note de contenu : This article is a contribution from the institute, USDA, and USDA/Aid major cereals west african project. Crops in Nigeria traditionally are grown on ridges, occasionally on hills, and in frequently on flat cultivated land. The pratice of ridge cropping is not related to climate, soils, or topography and is only partly dictated by crop requirements.

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Journal of the geographical Association of Nigeria. Effect of an exceptionnal storn on soil conservation at Samom, Nigeria / Kowal, J.

Public ISBD Titre de série : Journal of the geographical Association of Nigeria Titre : Effect of an exceptionnal storn on soil conservation at Samom, Nigeria Type de document : texte imprimé Auteurs : Kowal, J. Année de publication : December 1970 ISBN/ISSN/EAN : CI-04503 Note générale : Exceptionality heavy storns at Samaru are rare. On the average eighty-five per cent of annual rains recordd during the past forty-five years are falls of below one inch, twelve per cent are between 1.0-2.0 inches and only the remaining three per cent are falls of greater than two inches. Recently a record fall of 6.01 inches was measured at the Samaru meteorological station. This has provided a rare opportunity for assessing the characteristics of heavy storms, and its effect on water economy in a small catchment basin, in terms of rainfall acceptance and the proportion lost in run-off. The storm also provided a unique opportunity for assessing the adequacy of the existing soil conservation and flood control measures at Samaru farm and for observing the utility of various land management fractices in preventing damage to land and crops. Langues : Anglais (eng) Mots-clés : Conservation des sols  Erosion  Pluviométrie  Station météorologique  Météorologie  Débit fluvial  Ruissellement Index. décimale : 631.45 Erosion et lutte anti-érosion 631.46 Résumé : Exceptionality heavy storns at Samaru are rare. On the average eighty-five per cent of annual rains recordd during the past forty-five years are falls of below one inch, twelve per cent are between 1.0-2.0 inches and only the remaining three per cent are falls of greater than two inches. Recently a record fall of 6.01 inches was measured at the Samaru meteorological station. This has provided a rare opportunity for assessing the characteristics of heavy storms, and its effect on water economy in a small catchment basin, in terms of rainfall acceptance and the proportion lost in run-off. The storm also provided a unique opportunity for assessing the adequacy of the existing soil conservation and flood control measures at Samaru farm and for observing the utility of various land management fractices in preventing damage to land and crops. Note de contenu : Exceptionality heavy storns at Samaru are rare. On the average eighty-five per cent of annual rains recordd during the past forty-five years are falls of below one inch, twelve per cent are between 1.0-2.0 inches and only the remaining three per cent are falls of greater than two inches. Recently a record fall of 6.01 inches was measured at the Samaru meteorological station. This has provided a rare opportunity for assessing the characteristics of heavy storms, and its effect on water economy in a small catchment basin, in terms of rainfall acceptance and the proportion lost in run-off. The storm also provided a unique opportunity for assessing the adequacy of the existing soil conservation and flood control measures at Samaru farm and for observing the utility of various land management fractices in preventing damage to land and crops. Journal of the geographical Association of Nigeria. Effect of an exceptionnal storn on soil conservation at Samom, Nigeria [texte imprimé] / Kowal, J. . - December 1970. ISSN : CI-04503 Exceptionality heavy storns at Samaru are rare. On the average eighty-five per cent of annual rains recordd during the past forty-five years are falls of below one inch, twelve per cent are between 1.0-2.0 inches and only the remaining three per cent are falls of greater than two inches. Recently a record fall of 6.01 inches was measured at the Samaru meteorological station. This has provided a rare opportunity for assessing the characteristics of heavy storms, and its effect on water economy in a small catchment basin, in terms of rainfall acceptance and the proportion lost in run-off. The storm also provided a unique opportunity for assessing the adequacy of the existing soil conservation and flood control measures at Samaru farm and for observing the utility of various land management fractices in preventing damage to land and crops. Langues : Anglais (eng) Mots-clés : Conservation des sols  Erosion  Pluviométrie  Station météorologique  Météorologie  Débit fluvial  Ruissellement Index. décimale : 631.45 Erosion et lutte anti-érosion 631.46 Résumé : Exceptionality heavy storns at Samaru are rare. On the average eighty-five per cent of annual rains recordd during the past forty-five years are falls of below one inch, twelve per cent are between 1.0-2.0 inches and only the remaining three per cent are falls of greater than two inches. Recently a record fall of 6.01 inches was measured at the Samaru meteorological station. This has provided a rare opportunity for assessing the characteristics of heavy storms, and its effect on water economy in a small catchment basin, in terms of rainfall acceptance and the proportion lost in run-off. The storm also provided a unique opportunity for assessing the adequacy of the existing soil conservation and flood control measures at Samaru farm and for observing the utility of various land management fractices in preventing damage to land and crops. Note de contenu : Exceptionality heavy storns at Samaru are rare. On the average eighty-five per cent of annual rains recordd during the past forty-five years are falls of below one inch, twelve per cent are between 1.0-2.0 inches and only the remaining three per cent are falls of greater than two inches. Recently a record fall of 6.01 inches was measured at the Samaru meteorological station. This has provided a rare opportunity for assessing the characteristics of heavy storms, and its effect on water economy in a small catchment basin, in terms of rainfall acceptance and the proportion lost in run-off. The storm also provided a unique opportunity for assessing the adequacy of the existing soil conservation and flood control measures at Samaru farm and for observing the utility of various land management fractices in preventing damage to land and crops.

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Niger Agric. J.. 2- Water storage characteristics / Kowal, J.

Public ISBD Titre de série : Niger Agric. J. Titre : 2- Water storage characteristics Type de document : texte imprimé Auteurs : Kowal, J. Année de publication : 1968 ISBN/ISSN/EAN : CI-03604 Note générale : This study falls into two parts: one is concerned with evaluating the of the comoments in the above equation for successive. 1-ft depth intervals of soil profile, and is based on one site where total porosity, field capacity and macroporosity values with their confidence limits have been assessed. The other part is concerned with evaluating the dry season water-table gradient in relation to the topographical shope of the catchment basin. Langues : Anglais (eng) Mots-clés : Evapotranspiration  Drainage  Pluviometrie  Sol  Topographie  Infiltration  Bilan hydrique  Physique du sol  Recherche AGRONOMIE  Porosité Index. décimale : 526.9 Topométrie. Levés et arpentage, Photogrammétrie Résumé : This study falls into two parts: one is concerned with evaluating the of the comoments in the above equation for successive. 1-ft depth intervals of soil profile, and is based on one site where total porosity, field capacity and macroporosity values with their confidence limits have been assessed. The other part is concerned with evaluating the dry season water-table gradient in relation to the topographical shope of the catchment basin. Note de contenu : This study falls into two parts: one is concerned with evaluating the of the comoments in the above equation for successive. 1-ft depth intervals of soil profile, and is based on one site where total porosity, field capacity and macroporosity values with their confidence limits have been assessed. The other part is concerned with evaluating the dry season water-table gradient in relation to the topographical shope of the catchment basin. Niger Agric. J.. 2- Water storage characteristics [texte imprimé] / Kowal, J. . - 1968. ISSN : CI-03604 This study falls into two parts: one is concerned with evaluating the of the comoments in the above equation for successive. 1-ft depth intervals of soil profile, and is based on one site where total porosity, field capacity and macroporosity values with their confidence limits have been assessed. The other part is concerned with evaluating the dry season water-table gradient in relation to the topographical shope of the catchment basin. Langues : Anglais (eng) Mots-clés : Evapotranspiration  Drainage  Pluviometrie  Sol  Topographie  Infiltration  Bilan hydrique  Physique du sol  Recherche AGRONOMIE  Porosité Index. décimale : 526.9 Topométrie. Levés et arpentage, Photogrammétrie Résumé : This study falls into two parts: one is concerned with evaluating the of the comoments in the above equation for successive. 1-ft depth intervals of soil profile, and is based on one site where total porosity, field capacity and macroporosity values with their confidence limits have been assessed. The other part is concerned with evaluating the dry season water-table gradient in relation to the topographical shope of the catchment basin. Note de contenu : This study falls into two parts: one is concerned with evaluating the of the comoments in the above equation for successive. 1-ft depth intervals of soil profile, and is based on one site where total porosity, field capacity and macroporosity values with their confidence limits have been assessed. The other part is concerned with evaluating the dry season water-table gradient in relation to the topographical shope of the catchment basin.

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Nigeria Journal of Science, 1. Study of soil surface causts in the loess plain soils of Northen Nigeria / Kowal, J.

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Nigerian Agric. J., 1. Some physical properties of soil at Samaru, Zaria, Nigeria : Storage of water and ITS use by crops.1. Physical status of soils / Kowal, J.

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Nigerian Agricultural journal. Some physical properties of soils at Samaru, Zaria, Nigeria / storage of water and its use bycrops. 3- Seasonal pattern in soil water changes under various vegetation covers and base fallow / Kowal, J.

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Samaru Miscellaneous Paper, 44. Construction and prformance of a hydraulic weighing lysimeter at Samaru, Nigeria / Kowal, J.

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Savanna. Radiation and potential crop production at Samaru, Nigeria / Kowal, J.

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Soil-water-plant relationship at Samaru. / Kowal, J.

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Solar energy, water availability and crop prpduction in west Africa / Kowal, J.

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Utilité de la culture sur billon dans le cas de l'agriculture Nigériane / Kowal, J.

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