The objective of this study is to assess heavy metals, copper, cadmium and lead, uptake by food crops andvegetables grown in the greater Bangkok Metropolitan Region in Thailand. The three heavy metals were detected in three types of vegetables cultivated in three provinces Pathum Thani, Ayutthaya, and Nonthaburi representing Greater Bangkok Metropolitan Region (GBMR). An Inductively Coupled Plasma method was used to estimate and evaluate the levels of these metals’ concentration in the vegetables, soil, water, manure, and chemical fertilizer. The physical and chemical characterizations of which were conducted to compare the heavy metals concentrations with similar characteristics. Heavy metals concentrations were compared both in wetand dry season. Moreover, the edible and non-edible parts of the vegetables were also considered for the comparative study and found a significant difference in copper (Cu) concentrations in morning glory.The concentrations of Cu were found in edible and non-edible parts were 0.38 and 1.10 ug/g respectively. To account the flow of heavy metals concentration in  certain location, a mass balance analysis was conducted for the three different provinces, and found that about 18 mg of Cu accumulated in all three provinces. The cadmium (Cd) and lead (Pb) levels were found to be insignificant. The contributions of the vegetables to the daily intake of the heavy metals from the vegetables were determined.

The study was conducted from June to December 2021 to assess the technical – financial aspect and the existing advantages and difficulties of the giant freshwater prawn culture in coconut garden ditch culture by interviewing 32 farming households in Thanh Phu district, Ben Tre Province. The study results showed that the average area for each ditch was 0.38 ± 0.29 ha, with density stocking 4.15 ± 1.21 PL/m2. For prawns were harvested after over 8 months, the prawn yield was 421.08 ± 172.21 ton/ha/crop, the profit was 34.02 ± 14.02  million VND/ha/crop and the benefit ratio was 1.33 ± 0.56 times. The yield and the profits were affected by density stocking and nursing survival rate. Besides the advantages of labor resources, natural conditions, and  ease and less risk of giant freshwater prawn culture; however, the system currently faces many difficulties, such as lower nursing survival rate, unguaranteed quality, and quantity of postlarvae, salinity intrusion, unstableproduct market. Therefore, in order to contribute to sustainable aquaculture development, the necessary solutions include (1) providing high quality and quantity of postlarvae; (2) using settling ponds to have active water; (3) building and improving infrastructure, and irrigation systems to prevent salinity intrusion; and (4) finding the product market.