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Faire une suggestion Affiner la rechercheSamaru Miscellaneous Paper, 44. Construction and prformance of a hydraulic weighing lysimeter at Samaru, Nigeria / Kowal, J.
Titre de série : Samaru Miscellaneous Paper, 44 Titre : Construction and prformance of a hydraulic weighing lysimeter at Samaru, Nigeria Type de document : texte imprimé Auteurs : Kowal, J. ; Stoskinger, K. R. Mention d'édition : Institute for Agricultural Research, Samaru/ahmadu Bello University Editeur : Institute for Agricultural Research, Samaru/Ahmadu Bello University Année de publication : 1973 ISBN/ISSN/EAN : CI-04511 Note générale : A critical factor affecting crop production in the savana zone of west Africa is the availability of water to crops. To estimate the amount of water available for crops it is necessary to know the amount of supply by rainfall or irrigation, the amount used in evapotranspiration can be estimated by measuring changes in soil moisture by direct sampling, with tensiometers or a neutron probe or by calculation from meteorological data using formulae such as that of Penman (1948) or thornthwaite (1954). Penman's method only estimates the evaporation from a free water surface and Thornthwaite's formula is not very accusate for short periods. This paper describes the construction and performance of an hydraulic weighing bysineter that has been used successfully at Samaru since 1968. Langues : Anglais (eng) Mots-clés : Hydrologie Pluviométrie Production agricole Evaporation Evapotranspiration Mesure et observation Limnimétrie Méthode de Penman Index. décimale : 551.48 Hydrologie : Résumé : A critical factor affecting crop production in the savana zone of west Africa is the availability of water to crops. To estimate the amount of water available for crops it is necessary to know the amount of supply by rainfall or irrigation, the amount used in evapotranspiration can be estimated by measuring changes in soil moisture by direct sampling, with tensiometers or a neutron probe or by calculation from meteorological data using formulae such as that of Penman (1948) or thornthwaite (1954). Penman's method only estimates the evaporation from a free water surface and Thornthwaite's formula is not very accusate for short periods. This paper describes the construction and performance of an hydraulic weighing bysineter that has been used successfully at Samaru since 1968. Note de contenu : A critical factor affecting crop production in the savana zone of west Africa is the availability of water to crops. To estimate the amount of water available for crops it is necessary to know the amount of supply by rainfall or irrigation, the amount used in evapotranspiration can be estimated by measuring changes in soil moisture by direct sampling, with tensiometers or a neutron probe or by calculation from meteorological data using formulae such as that of Penman (1948) or thornthwaite (1954). Penman's method only estimates the evaporation from a free water surface and Thornthwaite's formula is not very accusate for short periods. This paper describes the construction and performance of an hydraulic weighing bysineter that has been used successfully at Samaru since 1968. Samaru Miscellaneous Paper, 44. Construction and prformance of a hydraulic weighing lysimeter at Samaru, Nigeria [texte imprimé] / Kowal, J. ; Stoskinger, K. R. . - Institute for Agricultural Research, Samaru/ahmadu Bello University . - Institute for Agricultural Research, Samaru/Ahmadu Bello University, 1973.
ISSN : CI-04511
A critical factor affecting crop production in the savana zone of west Africa is the availability of water to crops. To estimate the amount of water available for crops it is necessary to know the amount of supply by rainfall or irrigation, the amount used in evapotranspiration can be estimated by measuring changes in soil moisture by direct sampling, with tensiometers or a neutron probe or by calculation from meteorological data using formulae such as that of Penman (1948) or thornthwaite (1954). Penman's method only estimates the evaporation from a free water surface and Thornthwaite's formula is not very accusate for short periods. This paper describes the construction and performance of an hydraulic weighing bysineter that has been used successfully at Samaru since 1968.
Langues : Anglais (eng)
Mots-clés : Hydrologie Pluviométrie Production agricole Evaporation Evapotranspiration Mesure et observation Limnimétrie Méthode de Penman Index. décimale : 551.48 Hydrologie : Résumé : A critical factor affecting crop production in the savana zone of west Africa is the availability of water to crops. To estimate the amount of water available for crops it is necessary to know the amount of supply by rainfall or irrigation, the amount used in evapotranspiration can be estimated by measuring changes in soil moisture by direct sampling, with tensiometers or a neutron probe or by calculation from meteorological data using formulae such as that of Penman (1948) or thornthwaite (1954). Penman's method only estimates the evaporation from a free water surface and Thornthwaite's formula is not very accusate for short periods. This paper describes the construction and performance of an hydraulic weighing bysineter that has been used successfully at Samaru since 1968. Note de contenu : A critical factor affecting crop production in the savana zone of west Africa is the availability of water to crops. To estimate the amount of water available for crops it is necessary to know the amount of supply by rainfall or irrigation, the amount used in evapotranspiration can be estimated by measuring changes in soil moisture by direct sampling, with tensiometers or a neutron probe or by calculation from meteorological data using formulae such as that of Penman (1948) or thornthwaite (1954). Penman's method only estimates the evaporation from a free water surface and Thornthwaite's formula is not very accusate for short periods. This paper describes the construction and performance of an hydraulic weighing bysineter that has been used successfully at Samaru since 1968. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI03B511.140003 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140004 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140005 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140006 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140007 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140008 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140009 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B511.140010 CI-04511 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible
Titre de série : Samaru Research bulletin Titre : Wheat cultivation and research in Nigeria Type de document : texte imprimé Auteurs : Andrews, D. J. Mention d'édition : Institute for Agricultural Research, Samaru/Ahmadu Bello University Editeur : Institute for Agricultural Research, Samaru/Ahmadu Bello University Année de publication : 1970 ISBN/ISSN/EAN : CI-03014 Note générale : The location in the north of Nigeria which have been developed since 1960 to grow wheat under irrigation in the dry season are indicated and the method of cultivation described. Farmers obtain yields of between 1,200 to 1,800 1b of grain/acre (1,345 - 2,018 kg/ha). The problems which have been investigated and are reported here include variety assessment, fertiliser response, date of planting, and the disease situation. A larger number of varieties have been screened and two have been recommended in place of the local variety. Langues : Anglais (eng) Mots-clés : Système de culture Irrigation Alimentation en eau Fertilité Sélection variétale Index. décimale : 631.58 Méthodes de culture : jachère, assolement irrigation Résumé : The location in the north of Nigeria which have been developed since 1960 to grow wheat under irrigation in the dry season are indicated and the method of cultivation described. Farmers obtain yields of between 1,200 to 1,800 1b of grain/acre (1,345 - 2,018 kg/ha). The problems which have been investigated and are reported here include variety assessment, fertiliser response, date of planting, and the disease situation. A larger number of varieties have been screened and two have been recommended in place of the local variety. Note de contenu : The location in the north of Nigeria which have been developed since 1960 to grow wheat under irrigation in the dry season are indicated and the method of cultivation described. Farmers obtain yields of between 1,200 to 1,800 1b of grain/acre (1,345 - 2,018 kg/ha). The problems which have been investigated and are reported here include variety assessment, fertiliser response, date of planting, and the disease situation. A larger number of varieties have been screened and two have been recommended in place of the local variety. Samaru Research bulletin. Wheat cultivation and research in Nigeria [texte imprimé] / Andrews, D. J. . - Institute for Agricultural Research, Samaru/Ahmadu Bello University . - Institute for Agricultural Research, Samaru/Ahmadu Bello University, 1970.
ISSN : CI-03014
The location in the north of Nigeria which have been developed since 1960 to grow wheat under irrigation in the dry season are indicated and the method of cultivation described. Farmers obtain yields of between 1,200 to 1,800 1b of grain/acre (1,345 - 2,018 kg/ha). The problems which have been investigated and are reported here include variety assessment, fertiliser response, date of planting, and the disease situation. A larger number of varieties have been screened and two have been recommended in place of the local variety.
Langues : Anglais (eng)
Mots-clés : Système de culture Irrigation Alimentation en eau Fertilité Sélection variétale Index. décimale : 631.58 Méthodes de culture : jachère, assolement irrigation Résumé : The location in the north of Nigeria which have been developed since 1960 to grow wheat under irrigation in the dry season are indicated and the method of cultivation described. Farmers obtain yields of between 1,200 to 1,800 1b of grain/acre (1,345 - 2,018 kg/ha). The problems which have been investigated and are reported here include variety assessment, fertiliser response, date of planting, and the disease situation. A larger number of varieties have been screened and two have been recommended in place of the local variety. Note de contenu : The location in the north of Nigeria which have been developed since 1960 to grow wheat under irrigation in the dry season are indicated and the method of cultivation described. Farmers obtain yields of between 1,200 to 1,800 1b of grain/acre (1,345 - 2,018 kg/ha). The problems which have been investigated and are reported here include variety assessment, fertiliser response, date of planting, and the disease situation. A larger number of varieties have been screened and two have been recommended in place of the local variety. Réservation
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Exemplaires(8)
Code-barres Cote Support Localisation Section Disponibilité CI03B014.155211 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155212 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155213 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155214 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155215 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155216 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155217 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B014.155218 CI-03014 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible
