Demand Functions Estimation of Syrian Potatoes in the Jordanian and United Arab Emirates Markets

Mohammed Maary(1)* Maher Yousef(1) Mustafa Haj Hmaidi(1) and Bashar Nenneh(1)

(1). Department of economic, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(*Corresponding author: Eng. Mohammed Maary. E-Mail:

Received: 18/09/2018                                Accepted: 17/10/2018


The aim of the study was to identify the possibilities of developing Syrian potato exports and maintain market share in foreign markets by analyzing the current structure of Syrian potato exports and determining the most important factors influencing its demand in the main export markets of the Syrian potato. To achieve the objectives of the research, data were collected from secondary sources. Standard economic analysis methods represented in the estimation of some simple linear, multiple and nonlinear regression models, regression method and the correlation coefficients matrix were used to estimate the external demand functions of the Syrian potato. The results showed that the Arab countries were the most important importing markets for the Syrian potato during the period (2000-2015), and the most important markets were Jordan and the UAE, and the study of some variables affecting the Syrian potato crop in the Jordanian and UAE markets during the period (2000-2015), it was found that when the per capita income in Jordan led to the increase in the quantity required of the Syrian potato and the value of the elasticity of the demand for income was (-1.3), and the value of elasticity of demand price was (7.48), this means that the demand for Syrian potatoes is flexible. While price elasticity in the UAE market showed that the demand for Syrian potatoes is also flexible with the value of the elasticity of demand (-11.4). The price of Syrian potatoes for the prices of the competitive countries is one of the most competitive determinants of the potato product.

Keywords: Potato, Demand function, Price elasticity, Income elasticity.

Full Paper in Arabic: PDF

Effect of Salinity and Radiation on Regeneration of Two Potato (Solanum tuberosum L.) Genotypes Callus In vitro

Saadoon AL-Ajeely(1) Shaza Yousif(2) and Zeinab AL-Hussaini*(2)

(1). Faculty of Girl Education, Kufa University, Kufa, Iraq.

(2). Agricultural Research Directorate, Center of Biotechnology, Ministry of Science and Technology, Baghdad, Iraq.

(*Correponding author: Dr. Zienab Al-Hussaini. E-Mail:

Received: 07/12/2017                           Accepted: 24/01/2018


Experiments were conducted to study effect of radiation and salt levels on plant regeneration from callus for two cultivars of potato i.e. Riviera and Burren, under in vitro condition. Results showed that the efficiency of radiation in induced regeneration from callus in Riviera cultivar at salt level of (10 dS m-1) and Burren cultivar at salt levels (8, 12 dS  m-1). For the purpose of making sure inheritance of salinity tolerant, mutant clones (plants induced from salt tolerant calli, which planted at salt levels of 8, 10, 12 dS m-1 and plants induced from non salt tolerant calli, which planted at salt level of 6 dS m-1) and their parental cultivars (Riviera and Burren) by exposing to salt stress conditions and comparing them with control (6 dS m-1). Results revealed that the lowest percentage of reduction in plant height, number of nods per plant and tuberization were observed in salt tolerant mutants. Plant height and number of nodes/plant can be considered as selective morphological markers for  in vitro salt tolerance .

Key words: Potato,  Radiation,  Salinity, Regeneration, in vitro. 

Full paper in Arabic: PDF

Effect of Partial Root-zone Drying and Ridge Height on Water Use Efficiency of Potato Solanum tuberosum L. in Maareb Province, Yemen

Hazem Hezam Ahmed Al-Ashwal*(1) and Bandar Mohsen Ahmed Almangathy(2)

(1). Soil and Water Department, Regional Research Station in North Heights, Jidr, General Organization of Agricultural Research and Extension, Sanaa, Yemen Republic.
(2). Horticulture Department, Eastern Area Research Station, Marib, Yemen Republic.

Received: 16/12/2016                           Accepted: 15/02/2016


An experiment was conducted at a Research Farm, Eastern Regions of Agricultural Station, located in Almanien, Marib governorate, during 2009-2010 season, to study the effect of the partial root-zone drying PRD and ridge height on water use efficiency for potatoes in dry areas. The experiment was designed as factorial experiment (split plot design) to study two factors: first, irrigation method (I) included three treatments, full irrigation (FI), alternative partial irrigation  (API), and fixed partial irrigation (FPA), and the second factor was ridge height (R) included two treatments, high ridge (LR), height of edge ranged between 35-30 cm, and small ridge (SR), height of edge ranged between 25-20 cm. Results showed that application of PRD had higher water use efficiency WUE 0.0696 and 0.0677 tons/mm. hectare for API and FPA, respectively as compared to FI 0.0461 tons/mm. hectare. WUE increased significantly by 50.98 % in API treatment without any significant effect on growth, and yield indicators. Results also showed that the PRD technique reduced evaporation, transpiration, evapotranspiration, and deep percolation rates 28.39%, 19.81%, 49.87%, and 50.71%, respectively, compared to full irrigation. Also, the ridge height and interactions did not affect significantly yield, and WUE.

Key words: Ridge height, Partial irrigation, Potato, Water use efficiency.

Full paper in Arabic: Effect of Partial Root-zone Drying and Ridge Height on Water Use Efficiency of Potato Solanum tuberosum L. in Maareb Province, Yemen

Effect of Potato Variety and Pre-processing Treatment on Potato French Fries Quality

Mouwafak Jbour*(1) Widad Badran(1) Ghassan Shareef (2) and Ahmad Abdo(2)

(1). General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.
(2). Agricultural Research Center in Idlib, (GCSAR), Idlib, Syria.

(*Corresponding author: Mouwafak Jbour, E-Mail:

Received: 07/10/ 2014                                     Accepted: 17/05/ 2015


The research aimed to study the effect of three potato varieties (Agria, Liseta and Spunta) produced at Kafer Yahmool Research Station fields in Idlib, Syria, during 2010 and 2011 seasons, and also to study the effect of preprocessing treatments (storage temperature, storage period, and blanching) on some french-fries sensory traits. The results showed that there were significant differences among studied varieties in terms of the color and taste of the fries. Agria was the best variety under room temperature and when it stored under low temperature, whereas Liseta was the worst variety as compared to the other two varieties. Blanching for 10 min at a water temperature of 80°C, significantly improved fries color and removed the unacceptable brown color of potato samples which were stored under low temperature for a period of 40 or 80 days, it also improved significantly the taste and texture of the product. However, However, blanching for 30 min at a temperature of  65°C reduced the degree of color attraction resulting in pale color in Liseta variety.

Keywords: Potato, French-fries, Storage period, Storage temperature, Blanching

Full paper in Arabic: تأثير الصنف وبعض معاملات ما قبل التصنيع في نوعية أصابع البطاطا المقلية