Skip to main content Accessibility help
×
Home

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

  • A. Wahbi (a1), A. E. Matar (a1) and M. J. Jones (a1)

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

Copyright

References

Hide All
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 28:6387.
Matar, A. E. (1985). Phosphate fixation and management in rainfed calcareous soils. In Annual Report for 1985, 5966. Aleppo, Syria: ICARDA.
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, 1223 (Eds Matar, A. E., Soltanpour, P. N. and Chouinard, A.). Ankara, Turkey.
Mazid, A. (1990). Economic analysis of researcher-managed trial. In Farm Resource Management Program, Annual Report for 1989, 6267. Aleppo, Syria: ICARDA.

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

  • A. Wahbi (a1), A. E. Matar (a1) and M. J. Jones (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed