Vibol PEUO1*, Songsak MIMGRATOK1, Thaworn CHIMLIANG1, Yagura KENJIRO2, Sutisa CHAIKUL1, Phirum PEUO3
1 Faculty of Agricultural Technology, Rambhai Barni Rajabhat University, Chanthaburi 22000, Thailand;
2 Faculty of Economics, Hannan University, Osaka 580-8502, Japan;
3 Department of Rural Development, Battambang 02200, Cambodia.
*Corresponding author: e-mail: email@example.com
Cassava (Manihot esculenta Crantz) is one of the most important upland crops in Cambodia. However, there is still a shortage of information and research about its yield variations and the causal factors, which is important to know if our goal is to increase the cassava production in Cambodia. The objectives of this study were to highlight the yield variation and causal factors in agro-practices of cassava production in Battambang and Pailin provinces. In these two provinces, 109 cassava farmers were randomly selected from a list of households provided by each village chief. The results showed that the cassava yield ranged from 10 to 34 tons per hectare with the mean yield ranging from 29.41% to 82.35% of the maximum yield, while the corresponding yield gap ranged from 6 to 24 tons per hectare. The variables of the agro-practices, such as the weed control and the usage of herbicides and liquid fertilizers are the significant factors of the cassava yield. They account for 83% of the total yield variability among the sample farmers. The main constraints to cassava production are drought, weed density, pests, and diseases. The farmers had, in general, a low education; 41% of them had only a primary school education diploma. So, it was difficult for them to understand information on new techniques, the weather factors, the pest mitigation, and appropriate agro-practices. The knowledge of all those factors could improve the yield and narrow the cassava yield gap. Therefore, it is undeniable that the yield gap varies substantially in Cambodia.
Keywords: Agro-practices, analysis, Cambodia-Thailand, cassava, yield variation.