PVC agricultural hose can usually be used to transport water sources to longer distances, but some factors need to be considered to ensure effective water transport and irrigation effects.

Here are some factors to consider:

1. Water pressure and flow: Longer distances require greater water pressure and flow to overcome water friction and gravity. You need to make sure that the PVC hose you choose can withstand the required water pressure to maintain proper flow.

2. Hose diameter: Wider hose diameter can reduce water friction loss and provide greater flow. When choosing a hose diameter, consider the required flow, distance and water pressure.

3. Hose quality: Using high-quality PVC hose can reduce the risk of leaks and breaks, especially over longer distances. Reinforced PVC hoses may be more suitable for longer transfer distances.

4. Pumping station and pressure regulation: If the transmission distance is long, you may want to consider adding a pumping station along the way or use a pressure regulating device to ensure that the water maintains sufficient pressure throughout the pipeline.

5. Topography and elevation differences: Topographic elevation differences affect water mobility. You need to plan the direction of the water pipes to overcome the problems caused by the height difference.

6. Maintenance and Inspection: Longer water transfer distances may mean greater risks such as leakage or damage. Check hoses and pipes regularly for leaks and breakage.

When planning and implementing a long-distance water transmission system, it is best to consult a professional agricultural engineer or irrigation specialist to ensure that the design and operation of the system is efficient and reliable. They can provide personalized advice based on your specific situation.