Econometric Analysis of the Cost Functions of Spring Potatoes in Hama Government-Alghab Region

Moammar Dayoub*(1) Ibrahim Abdullah(2) Ramez Hamada(2) and Bassam Ali(3)

(1). Salamieh Agricultural Rresearch Center, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.
(2). Alghab Agricultural Research Center, (GCSAR), Damascus, Syria.
(3). Administration of Economic and Social Studies, (GCSAR), Damascus, Syria.
(*Corresponding author: Dr. Moammar Dayoub. E-Mail:

Received: 07/09/ 2015                                     Accepted: 01/01/ 2016


The research was conducted in Hama governorate-Alghab region, and it based on a random sample of 135 spring potatoes farmers. Data was collected using special questionnaire designed for this purpose. The research aimed to estimate the cost functions in order to reach economic sizes of production and farm. The results showed that the optimum size, which minimize the cost was 40464.6 kg/ha, for the first category (less than 1 hectare), while the average actual production was 19031.25 kg/ha, but the optimum size for the third category (more than 3 hectares) was 43855.9 kg/ha, and the actual production was 26675 kg/ha. The study revealed also that the optimum size of the farm is 4.85 hectares, and the average farm size of the sample was 1.64. Level of profitability stood at 145.69% for the first category and reached 194.59% for the third one. The average cost also declined from 12.46 S.P. /Kg for the first category to 11.05 S.P. /Kg for the third one. The study emphasized the need to aggregate holdings in order to reduce production costs and to achieve better returns to scale.

Keywords: Spring potatoes, Economic scale, Cost function.

Full paper in Arabic: Econometric Analysis of the Cost Functions of Spring Potatoes in Hama Government-Alghab Region

Econometrical Estimate of Cost and Production Functions of Non-Irrigated Apple in Suwayda Government, Syria

Alaa Al Zagout*(1) Safwan Abo Assaf(2) Amgad Badr(2) and Yehya Sharaf(3)

(1). Extension and Social Studies Department, Agricultural Extension Directorate, Ministry of Agriculture and Agrarian Reform (MOAAR), Swayda, Syria.
(2). Economic and Social Studies Department, Agriculture Research Center in Swayda, General Commission for Scientific and Agricultural Research (GCSAR), Swayda, Syria.
(3). Extension Programs Division, Extension Department, Agricultural Extension Directorate, (MOAAR), Swayda, Syria.

(*Correspoding author: Dr. Alaa Al Zagout. E-Mail:

Received: 04/05/ 2015                                     Accepted: 01/07/ 2015


Apple production is an important agricultural productive activity in Suwayda, Syria, therefore this research aimed to estimate some measurements of the financial analysis, and costs and production functions of the available resources. The primary data was collected from Suwayda governorate using random sample of (268) observations during 2012. The main results of the study were as follow: Land rent, control, and pruning costs were the highest production costs of about 25%, 18%, 9% respectively. All farms within all scales were working in the first stage of the diminishing return law. The optimum size of the apple farm is about 9.5 hectares. The most important factors affecting apple production were: altitude, age of tree, phosphate fertilizer, potassium fertilizer, framer’s job, labor, invested capital, and summer tillage.

Keywords: Apple, Cost function, Production function, Optimum production size.

Full paper in Arabic: التقدير القياسي لدوال تكاليف وإنتاج التفاح البعل في محافظة السويداء