- Siltation of the canals by deposited alluvium which limits flow of water to the crop fields.
- Very hot temperatures which lead to high evaporation rates that drain the soils making them unsuitable for crop growth.
- Salination of the soils near the irrigated zones through capillarity making them less fertile and unproductive.
- Over use of fertilizers to ensure all-year –round production which end up polluting the soils through affecting the oil PH.
- Occasional flooding of the river banks during the heavy rainy seasons leading to destruction of some crop fields.
- High costs of production involved in dredging of silted canals, maintaining and repairing of cracked canals making irrigation farming very expensive.
- Outbreak of pests and diseases which affect the quality and quantity of crops.
- Limited land for agricultural expansion due to the ever increasing population which requires more land for settlement and infrastructural development.
- Pollution of irrigation water by industrial wastes and fertilizers leading to the wilting of crops.
- Over flooding which washes away the weak canal culverts hence distorting water transfer the crop yields.
SOLUTIONS TO PROBLEMS FACING IRRIGATION FARMING IN CHINA
- Dredging is carried out to reduce siltation.
- Use of particles and insect icicles to control pests and diseases.
- Treatment of industrial wastes before emission to reduce pollution.
- Hiring migrant workers during the busy periods to avoid labor shortage.
- Acquiring loans from the government construct and maintain. Irrigation canals.
- Land redamation of swamps and wastelands to create more land for irrigation farming