They are all river ditches. Why are some ditches good for fishing, some bad for fishing, and some have no fish in them? We can talk about this in four aspects.1. First of all, we should learn to distinguish which ditches have fish and which ditches have no fish.A ditch with fish must meet several conditions:(1) Basically, it does not dry up and has water for many years. For example, there are water source ditches, rivers, lakes, reservoir inlets and water distribution outlets.(2) No pollution. Chemical pollution, pesticide pollution and excrement pollution (the amount of excrement discharged from farms is very large).(3) There are aquatic plants in the wild ditches, farmland, forests, grasslands and the like beside the ditches. Ditches rich in food are also suitable for hiding fish.What are the characteristics of ditches without fish?There are many ditches in the countryside, and only when crops are irrigated will the floodgates be opened to drain water. Some ditches are used for flood discharge, and water is basically available only in summer. There are also some dead ditches in which domestic sewage is discharged and accumulated for many years (especially the washing powder, laundry detergent, detergent and the like currently used) and does not flow. Biogas will be generated for a long time, not to mention fish and mice. There are some small rivers and ditches on the edge of the city, which are polluted by industrial sewage and give off a pungent smell. There are basically no living creatures in them. There is also the widespread use of pesticides, which is also quite harmful to fish. Finally, there are artificial electric fish. After the medicine fish is basically made, there are no small fry!2. Fish eat at different times in different seasons.The choice of time will also result in sometimes good fishing and sometimes air force.(1) Spring: The fish have just passed the severe winter and are short of food. They will supplement their energy and usher in the spawning period. If they go fishing in the morning, the fish will have a good mouth.(2) Summer: The weather is hot and the fish’s desire to eat is not high, but the harvest is also good in the morning and at night. It is also very suitable for fishing on light rainy days and after rain.(3) Autumn: A good season for fishing. In order to accumulate energy for winter, the fish mouth is crazy.(4) Winter: It’s time to test the technique. The fish mouth is light and the bait is picked. You should choose a sunny day to go out for fishing.Fishing for deep water or shallow water also depends on the time and season. Predecessors often said: fishing for beaches in spring, fishing for Tan in summer, fishing for shade in autumn and fishing for sun in winter.3. The wrong fishing position will also make you get nothing and feel that there is no fish.Seven points of fishing position and three points of bait. Birch tip, back bay, water outlet, grass nest, forest edge, rocky pile, old fishing position that often fishes are all good positions. You should also observe fish stars more and see where fish haunt.4. Feed selection is also very important.When fishing in the wild ditch, first understand the presence of what fish, and then choose palatable bait. Only when the bait is palatable can good fish catch be obtained. Wild fish are different from cultured fish in that they are close to natural bait, such as cereal and earthworms, red worms, loaches, or buying some fresh shrimps to break and add bait.