| Titre de série : |
Nigerian Agricultural journal |
| Titre : |
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 |
| Type de document : |
texte imprimé |
| Auteurs : |
Kowal, J. |
| Mention d'édition : |
Abiodun printing works LTD |
| Editeur : |
Abiodun printing works LTD |
| Année de publication : |
April 1969 |
| ISBN/ISSN/EAN : |
CI-04504 |
| Note générale : |
Seasonal pattern in soil water changes under various vegetation covers and bare follow was studied using a neutron meter during the 1967-8 season. At the begining of the growing season the soil moisture deficit ranged from 4.6 in. for bare follow to 10.7 in. for indigenous bush vegetation with crops occupying an intermediate position. Recharge of soil profile was gradual and was completed by the end of july when cumulative rainfall of the season reached 21 in. During the period of recharge, the amount and distribution of rainfall was such tht full potential evapo-transpiration rates were maintained. The surface run off during this period was negligible. The main growing season in August and September was characterised by surplus rainfall well in excess of evapo-transpiration demands, the surplus water was stored in the form of a raised water- table, but considerable amounts may be lost in surface run-off. |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Bilan hydrique Saison des pluies Pluviométrie Evapotranspiration Besoin en eau des plantes Physique du sol Méthodologie Stockage d'eau Utilisation de l'eau Calcul hydraulique |
| Index. décimale : |
621.2 Hydraulique : turbines, pompes, accumulateurs, transmission hydraulique |
| Résumé : |
Seasonal pattern in soil water changes under various vegetation covers and bare follow was studied using a neutron meter during the 1967-8 season. At the begining of the growing season the soil moisture deficit ranged from 4.6 in. for bare follow to 10.7 in. for indigenous bush vegetation with crops occupying an intermediate position. Recharge of soil profile was gradual and was completed by the end of july when cumulative rainfall of the season reached 21 in. During the period of recharge, the amount and distribution of rainfall was such tht full potential evapo-transpiration rates were maintained. The surface run off during this period was negligible. The main growing season in August and September was characterised by surplus rainfall well in excess of evapo-transpiration demands, the surplus water was stored in the form of a raised water- table, but considerable amounts may be lost in surface run-off. |
| Note de contenu : |
Seasonal pattern in soil water changes under various vegetation covers and bare follow was studied using a neutron meter during the 1967-8 season. At the begining of the growing season the soil moisture deficit ranged from 4.6 in. for bare follow to 10.7 in. for indigenous bush vegetation with crops occupying an intermediate position. Recharge of soil profile was gradual and was completed by the end of july when cumulative rainfall of the season reached 21 in. During the period of recharge, the amount and distribution of rainfall was such tht full potential evapo-transpiration rates were maintained. The surface run off during this period was negligible. The main growing season in August and September was characterised by surplus rainfall well in excess of evapo-transpiration demands, the surplus water was stored in the form of a raised water- table, but considerable amounts may be lost in surface run-off. |
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 [texte imprimé] / Kowal, J. . - Abiodun printing works LTD . - Abiodun printing works LTD, April 1969. ISSN : CI-04504 Seasonal pattern in soil water changes under various vegetation covers and bare follow was studied using a neutron meter during the 1967-8 season. At the begining of the growing season the soil moisture deficit ranged from 4.6 in. for bare follow to 10.7 in. for indigenous bush vegetation with crops occupying an intermediate position. Recharge of soil profile was gradual and was completed by the end of july when cumulative rainfall of the season reached 21 in. During the period of recharge, the amount and distribution of rainfall was such tht full potential evapo-transpiration rates were maintained. The surface run off during this period was negligible. The main growing season in August and September was characterised by surplus rainfall well in excess of evapo-transpiration demands, the surplus water was stored in the form of a raised water- table, but considerable amounts may be lost in surface run-off. Langues : Anglais ( eng)
| Mots-clés : |
Bilan hydrique Saison des pluies Pluviométrie Evapotranspiration Besoin en eau des plantes Physique du sol Méthodologie Stockage d'eau Utilisation de l'eau Calcul hydraulique |
| Index. décimale : |
621.2 Hydraulique : turbines, pompes, accumulateurs, transmission hydraulique |
| Résumé : |
Seasonal pattern in soil water changes under various vegetation covers and bare follow was studied using a neutron meter during the 1967-8 season. At the begining of the growing season the soil moisture deficit ranged from 4.6 in. for bare follow to 10.7 in. for indigenous bush vegetation with crops occupying an intermediate position. Recharge of soil profile was gradual and was completed by the end of july when cumulative rainfall of the season reached 21 in. During the period of recharge, the amount and distribution of rainfall was such tht full potential evapo-transpiration rates were maintained. The surface run off during this period was negligible. The main growing season in August and September was characterised by surplus rainfall well in excess of evapo-transpiration demands, the surplus water was stored in the form of a raised water- table, but considerable amounts may be lost in surface run-off. |
| Note de contenu : |
Seasonal pattern in soil water changes under various vegetation covers and bare follow was studied using a neutron meter during the 1967-8 season. At the begining of the growing season the soil moisture deficit ranged from 4.6 in. for bare follow to 10.7 in. for indigenous bush vegetation with crops occupying an intermediate position. Recharge of soil profile was gradual and was completed by the end of july when cumulative rainfall of the season reached 21 in. During the period of recharge, the amount and distribution of rainfall was such tht full potential evapo-transpiration rates were maintained. The surface run off during this period was negligible. The main growing season in August and September was characterised by surplus rainfall well in excess of evapo-transpiration demands, the surplus water was stored in the form of a raised water- table, but considerable amounts may be lost in surface run-off. |
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