A Whole-Farm Model Based on Experimental Flocks and Crop Rotations in Northwest Syria

Nordblom, T.L., Thomson, E.F. 1987. A whole-farm model based on experimental flocks and crop rotations in northwest Syria. ICARDA-102En. ICARDA. Aleppo, Syria. January 1987. 78 pp.

85 Pages Posted: 20 Sep 2012

See all articles by Thomas L. Nordblom

Thomas L. Nordblom

Graham Centre for Agricultural Innovation (Charles Sturt University & NSW DPI)

Euan Thomson

Independent

Date Written: January 1987

Abstract

This document describes a whole-farm model based on data from farm scale crop, sheep and native pasture experiments managed by scientists. The data are integrated using linear programming (LP), and tests of the economic viability of intensified production systems are presented.

A six year experiment at Tel Hadya, 30 km SW of Aleppo, Syria, provided data on four rainfed crop rotations: (1) barley-fallow, (2) barley-vetch, (3) wheat-lentil-water melon and (4) wheat-vetch-water melon. “Traditional” rotations (1 and 3 above) were managed as by farmers in the area; “high-input” rotations (2 and 4) incorporated vetch crops for pasture or hay and used “improved” cultural practices and cereal varieties. Experimental flocks of Awassi ewes provided three levels of nutrition-performance data. Preliminary estimates were used for native pasture offtakes, with and without phosphate fertilizer. A farm survey in 1985 provided price data.

The LP model was used to compute optimal solutions for 36 resource and management scenarios. Farm profits with the “high input” rotations were greater than those of the “traditional” rotations under all comparable resource conditions, the former being associated with greater crop yields and sheep numbers. Profits and ewe numbers increased when native pasture was added to the farm, and increased further with fertilized pasture. Optimal ewe numbers declined with a change from low to high nutritional regimes, but farm profits were little affected.

The present analysis suggests the replacement of fallow and lentils by vetch, with judicious management, may lead to more productive and profitable crop-livestock husbandry in environments similar to Tel Hadya.

Keywords: ICARDA, Aleppo, Syria, Rainfed crop rotations, Wheat, Barley, Lentils, Vetch, Water melons, Native pasture, Awassi sheep, Sheep nutrition, Farm management, Whole-farm analysis, Linear Programming, Economics

JEL Classification: N55, O12, O13, Z13

Suggested Citation

Nordblom, Thomas L. and Thomson, Euan, A Whole-Farm Model Based on Experimental Flocks and Crop Rotations in Northwest Syria (January 1987). Nordblom, T.L., Thomson, E.F. 1987. A whole-farm model based on experimental flocks and crop rotations in northwest Syria. ICARDA-102En. ICARDA. Aleppo, Syria. January 1987. 78 pp.. Available at SSRN: https://ssrn.com/abstract=2147573

Thomas L. Nordblom (Contact Author)

Graham Centre for Agricultural Innovation (Charles Sturt University & NSW DPI) ( email )

Albert Pugsley Place
Wagga Wagga, NSW 2650
Australia
+61419290428 (Phone)

HOME PAGE: http://www.csu.edu.au/research/grahamcentre/our-people/members2/tom-nordblom

Euan Thomson

Independent ( email )

No Address Available
United States

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