Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-23T10:23:20.431Z Has data issue: false hasContentIssue false
  • English
  • Français

Responses of a Forage Hay Crop to the Residual Effects of Nitrogen and Phosphorus Fertilizers in On-Farm Trials in Northern Syria

Published online by Cambridge University Press:  03 October 2008

A. Wahbi ,
A. E. Matar  and
M. J. Jones
A. Wahbi
Affiliation:
International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
A. E. Matar
Affiliation:
International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
M. J. Jones
Affiliation:
International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
Get access Rights & Permissions [Opens in a new window]

Summary

Fourteen on-farm sites used in barley fertilizer trials were retained for a second year and, without further fertilizer, sown with a mixed vetch/barley forage crop. Rainfall at the sites ranged from 149 to 451 mm, and linear regression on rainfall accounted for 76% of the variation in hay yield between the sites, with a greater rain-related increase in vetch than barley. Soil nitrogen and phosphorus content at planting time in the second year was significantly affected by the rate of fertilizer application in the previous year. Previous phosphate fertilization tended to increase hay yields, particularly at sites where levels of native available phosphate were poor. However, responses to residual fertilizer nitrogen were small and variable.

Respuesta al N y P residual en el norte de Siria

Type
Research Article
Information
Experimental Agriculture , Volume 29 , Issue 4 , October 1993 , pp. 429 - 435
Copyright
Copyright © Cambridge University Press 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Jones, M. J. & Wahbi, A. (1992). Site-factor influence on barley response to fertilizer in on-farm trials in northern Syria: descriptive and predictive models. Experimental Agriculture 28:63–87.Google Scholar
Matar, A. E. (1985). Phosphate fixation and management in rainfed calcareous soils. In Annual Report for 1985, 59–66. Aleppo, Syria: ICARDA.Google Scholar
Matar, A. E., Jabbour, E. & El-Hajj, K. (1987). Prediction of barley response to fertilizers by means of soil nitrogen and phosphorus tests. In Proceedings of Workshop, Soil Test Calibration in West Asia and North Africa, 12–23 (Eds Matar, A. E., Soltanpour, P. N. and Chouinard, A.). Ankara, Turkey.Google Scholar
Mazid, A. (1990). Economic analysis of researcher-managed trial. In Farm Resource Management Program, Annual Report for 1989, 62–67. Aleppo, Syria: ICARDA.Google Scholar