DEPARTMENT OF AGRICULTURAL ENGINEERING AHMADU BELLO UNIVERSITY ZARIA: A TIME-BASED STRESS-DAY INDEX CONCEPT FOR IRRIGATION SCHEDULING
DEPARTMENT OF AGRICULTURAL ENGINEERING AHMADU BELLO UNIVERSITY ZARIA: A TIME-BASED STRESS-DAY INDEX CONCEPT FOR IRRIGATION SCHEDULING
| dc.contributor.author | BUNGWON, Z. D. | |
| dc.date.accessioned | 2014-11-05T08:46:00Z | |
| dc.date.available | 2014-11-05T08:46:00Z | |
| dc.date.issued | 1992-11 | |
| dc.description | Being a thesis submitted to the Postgraduate School, Ahmadu Bello University, in partial fulfillment of the requirements for the award of M.Sc Degree in Agricultural Engineering. November, 1993 | en_US |
| dc.description.abstract | A time-based concept which provides a quantitative means for estimating the plant water stress imposed on a crop during its growing season to provide a criterion for characterising the need for irrigation is presented, based on the stress -Day Index (SDI) concept. Wheat (Triticum aestivum L.) was used as the experimental crop, at the Ahmadu Bello University Farm during the 1991/92 irrigation season. The Time-based concept was evaluated by comparing; (1) estimates of plant-based plant water deficits corresponding to specified time intervals at different crop growth stages; (2) the values of water used efficiencies from the time-based concept for irrigation scheduling with results obtained from a conventional irrigation scheduling approach; and (3) Estimating the Correlation Coefficient between seasonal crop water stress and grain yield from the time-based concept. The results indicated that the time-based form of characterising plant water deficit is less effective with regards to the definition of crop susceptibilities to water deficits as a function of the timing of occurance of the deficit. However, using the time-based concept for irrigation scheduling, an increase of 20.5 per cent in water use efficincy was obtained over that of the conventional approach to irrigation scheduling. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/5550 | |
| dc.language.iso | en | en_US |
| dc.subject | DEPARTMENT, | en_US |
| dc.subject | AGRICULTURAL, | en_US |
| dc.subject | ENGINEERING, | en_US |
| dc.subject | AHMADU BELLO UNIVERSITY ZARIA | en_US |
| dc.title | DEPARTMENT OF AGRICULTURAL ENGINEERING AHMADU BELLO UNIVERSITY ZARIA: A TIME-BASED STRESS-DAY INDEX CONCEPT FOR IRRIGATION SCHEDULING | en_US |
| dc.type | Thesis | en_US |