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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.

Public ISBD Titre de série : Cotton Grow. Rev. Titre : Cotton production in Northern states of Nigeria in relation of water availability and crop water use Type de document : texte imprimé Auteurs : Kowal, J. M. ; Faulkmer, R. C. Année de publication : 1975 ISBN/ISSN/EAN : CI-10536 Note générale : Cotton growing and the main zones of production in Nigeria are described and previous work on crop water rela is reviwed. Water availability and water use by cotton arev presented in the form of a water budget, and as the continuous function ET/EO during the growing season, using data obtained from a weighing hysimeter at samaru, a typical site in a major cotton growing zone. In addition, observations on the height of the water table, measurements of soil water status made with a neutron probe, and data on crop development (in terms of leaf area index and flowering) are considered. Cotton production is discussed in relation to some phases, in particulier the effects of sawing date and length of the rainy season on the duration of the second phase in the various productions zones. Langues : Anglais (eng) Mots-clés : Production agricole  Coton  Récolte  Ressource en eau  Pluviométrie  Sol  Evapotranspiration Index. décimale : 630 Agriculture et techniques connexes Résumé : Cotton growing and the main zones of production in Nigeria are described and previous work on crop water rela is reviwed. Water availability and water use by cotton arev presented in the form of a water budget, and as the continuous function ET/EO during the growing season, using data obtained from a weighing hysimeter at samaru, a typical site in a major cotton growing zone. In addition, observations on the height of the water table, measurements of soil water status made with a neutron probe, and data on crop development (in terms of leaf area index and flowering) are considered. Cotton production is discussed in relation to some phases, in particulier the effects of sawing date and length of the rainy season on the duration of the second phase in the various productions zones. Note de contenu : Cotton growing and the main zones of production in Nigeria are described and previous work on crop water rela is reviwed. Water availability and water use by cotton arev presented in the form of a water budget, and as the continuous function ET/EO during the growing season, using data obtained from a weighing hysimeter at samaru, a typical site in a major cotton growing zone. In addition, observations on the height of the water table, measurements of soil water status made with a neutron probe, and data on crop development (in terms of leaf area index and flowering) are considered. Cotton production is discussed in relation to some phases, in particulier the effects of sawing date and length of the rainy season on the duration of the second phase in the various productions zones. Cotton Grow. Rev.. Cotton production in Northern states of Nigeria in relation of water availability and crop water use [texte imprimé] / Kowal, J. M. ; Faulkmer, R. C. . - 1975. ISSN : CI-10536 Cotton growing and the main zones of production in Nigeria are described and previous work on crop water rela is reviwed. Water availability and water use by cotton arev presented in the form of a water budget, and as the continuous function ET/EO during the growing season, using data obtained from a weighing hysimeter at samaru, a typical site in a major cotton growing zone. In addition, observations on the height of the water table, measurements of soil water status made with a neutron probe, and data on crop development (in terms of leaf area index and flowering) are considered. Cotton production is discussed in relation to some phases, in particulier the effects of sawing date and length of the rainy season on the duration of the second phase in the various productions zones. Langues : Anglais (eng) Mots-clés : Production agricole  Coton  Récolte  Ressource en eau  Pluviométrie  Sol  Evapotranspiration Index. décimale : 630 Agriculture et techniques connexes Résumé : Cotton growing and the main zones of production in Nigeria are described and previous work on crop water rela is reviwed. Water availability and water use by cotton arev presented in the form of a water budget, and as the continuous function ET/EO during the growing season, using data obtained from a weighing hysimeter at samaru, a typical site in a major cotton growing zone. In addition, observations on the height of the water table, measurements of soil water status made with a neutron probe, and data on crop development (in terms of leaf area index and flowering) are considered. Cotton production is discussed in relation to some phases, in particulier the effects of sawing date and length of the rainy season on the duration of the second phase in the various productions zones. Note de contenu : Cotton growing and the main zones of production in Nigeria are described and previous work on crop water rela is reviwed. Water availability and water use by cotton arev presented in the form of a water budget, and as the continuous function ET/EO during the growing season, using data obtained from a weighing hysimeter at samaru, a typical site in a major cotton growing zone. In addition, observations on the height of the water table, measurements of soil water status made with a neutron probe, and data on crop development (in terms of leaf area index and flowering) are considered. Cotton production is discussed in relation to some phases, in particulier the effects of sawing date and length of the rainy season on the duration of the second phase in the various productions zones.

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IITA Technical bulletin. Role of mulching techniques in tropical soil and water management / Lal, R.

Public ISBD Titre de série : IITA Technical bulletin Titre : Role of mulching techniques in tropical soil and water management Type de document : texte imprimé Auteurs : Lal, R. Mention d'édition : IITA Editeur : IITA Année de publication : 1975 ISBN/ISSN/EAN : CI-10029 Note générale : Surface mulching with crop residue at the rate of 4 to 6 tons/ha decrease soil temperature and maintains favorable soil structure through enhanced biological activity. Continuous surface cover can be maintained by growing and least competitive cover crops or by the use of crop residue through rotation and tillage techniques. Mulch tillage such as minimum tillage based on the zonal tillage concept of maintaining crop residue in the inter-row zone and simultaneously providing a good seed bed meets most soil management requirements for many upland crops. Yields of maize, cowpeas, pigeon peas, soybeans and sweet potatoes on mulch tillage plots equal yields from plowed ploto. A the same time the soil erosion is minimal and soil structure is maintained by more intensive soil flora fauna activity. Langues : Anglais (eng) Mots-clés : Gestion de l'eau  Sol  Récolte  Erosion  Matière organique  Agriculture  Température  Rotation des cultures  Mil  Riz  Maïs  Céréale  Besoin en eau des plantes Index. décimale : 630 Agriculture et techniques connexes Résumé : Surface mulching with crop residue at the rate of 4 to 6 tons/ha decrease soil temperature and maintains favorable soil structure through enhanced biological activity. Continuous surface cover can be maintained by growing and least competitive cover crops or by the use of crop residue through rotation and tillage techniques. Mulch tillage such as minimum tillage based on the zonal tillage concept of maintaining crop residue in the inter-row zone and simultaneously providing a good seed bed meets most soil management requirements for many upland crops. Yields of maize, cowpeas, pigeon peas, soybeans and sweet potatoes on mulch tillage plots equal yields from plowed ploto. A the same time the soil erosion is minimal and soil structure is maintained by more intensive soil flora fauna activity. Note de contenu : Surface mulching with crop residue at the rate of 4 to 6 tons/ha decrease soil temperature and maintains favorable soil structure through enhanced biological activity. Continuous surface cover can be maintained by growing and least competitive cover crops or by the use of crop residue through rotation and tillage techniques. Mulch tillage such as minimum tillage based on the zonal tillage concept of maintaining crop residue in the inter-row zone and simultaneously providing a good seed bed meets most soil management requirements for many upland crops. Yields of maize, cowpeas, pigeon peas, soybeans and sweet potatoes on mulch tillage plots equal yields from plowed ploto. A the same time the soil erosion is minimal and soil structure is maintained by more intensive soil flora fauna activity. IITA Technical bulletin. Role of mulching techniques in tropical soil and water management [texte imprimé] / Lal, R.  . -  IITA . - IITA, 1975. ISSN : CI-10029 Surface mulching with crop residue at the rate of 4 to 6 tons/ha decrease soil temperature and maintains favorable soil structure through enhanced biological activity. Continuous surface cover can be maintained by growing and least competitive cover crops or by the use of crop residue through rotation and tillage techniques. Mulch tillage such as minimum tillage based on the zonal tillage concept of maintaining crop residue in the inter-row zone and simultaneously providing a good seed bed meets most soil management requirements for many upland crops. Yields of maize, cowpeas, pigeon peas, soybeans and sweet potatoes on mulch tillage plots equal yields from plowed ploto. A the same time the soil erosion is minimal and soil structure is maintained by more intensive soil flora fauna activity. Langues : Anglais (eng) Mots-clés : Gestion de l'eau  Sol  Récolte  Erosion  Matière organique  Agriculture  Température  Rotation des cultures  Mil  Riz  Maïs  Céréale  Besoin en eau des plantes Index. décimale : 630 Agriculture et techniques connexes Résumé : Surface mulching with crop residue at the rate of 4 to 6 tons/ha decrease soil temperature and maintains favorable soil structure through enhanced biological activity. Continuous surface cover can be maintained by growing and least competitive cover crops or by the use of crop residue through rotation and tillage techniques. Mulch tillage such as minimum tillage based on the zonal tillage concept of maintaining crop residue in the inter-row zone and simultaneously providing a good seed bed meets most soil management requirements for many upland crops. Yields of maize, cowpeas, pigeon peas, soybeans and sweet potatoes on mulch tillage plots equal yields from plowed ploto. A the same time the soil erosion is minimal and soil structure is maintained by more intensive soil flora fauna activity. Note de contenu : Surface mulching with crop residue at the rate of 4 to 6 tons/ha decrease soil temperature and maintains favorable soil structure through enhanced biological activity. Continuous surface cover can be maintained by growing and least competitive cover crops or by the use of crop residue through rotation and tillage techniques. Mulch tillage such as minimum tillage based on the zonal tillage concept of maintaining crop residue in the inter-row zone and simultaneously providing a good seed bed meets most soil management requirements for many upland crops. Yields of maize, cowpeas, pigeon peas, soybeans and sweet potatoes on mulch tillage plots equal yields from plowed ploto. A the same time the soil erosion is minimal and soil structure is maintained by more intensive soil flora fauna activity.

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Samaru Research bulletin. The use of fertilisers in the maintenance of soil fertility under intensive cropping in northern Nigeria / Heathcote, R.G.

Public ISBD Titre de série : Samaru Research bulletin Titre : The use of fertilisers in the maintenance of soil fertility under intensive cropping in northern Nigeria Type de document : texte imprimé Auteurs : Heathcote, R.G. Mention d'édition : IAR/SABU Editeur : IAR/SABU Année de publication : 1975 ISBN/ISSN/EAN : CI-10832 Note générale : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Langues : Anglais (eng) Mots-clés : Fertilisation  Sol  Maintenance  Récolte  Pollution  Culture intensive Index. décimale : 628.55 Pollution du sol Résumé : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Note de contenu : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Samaru Research bulletin. The use of fertilisers in the maintenance of soil fertility under intensive cropping in northern Nigeria [texte imprimé] / Heathcote, R.G.  . -  IAR/SABU . - IAR/SABU, 1975. ISSN : CI-10832 Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Langues : Anglais (eng) Mots-clés : Fertilisation  Sol  Maintenance  Récolte  Pollution  Culture intensive Index. décimale : 628.55 Pollution du sol Résumé : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Note de contenu : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas.

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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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