Organic fertilizer production lines have the following specific effects on farmers' incomes:

1. Improve crop yield and quality: Organic fertilizers can provide comprehensive nutrients, thereby improving crop yield and quality. Improved crop quality helps farmers get a better price on the market and increase their income.

2. Reduce production costs: Organic fertilizer equipment reduces the use of fertilizers and reduces agricultural production costs by utilizing agricultural waste as resources. At the same time, the use of organic fertilizers reduces the use of pesticides, further reducing costs.

3. Improve soil fertility: Long-term application of organic fertilizer can improve soil fertility and productivity, reduce dependence on fertilizer, and thus reduce farmers' spending on fertilizer.

4. Promote sustainable development of agriculture: organic fertilizer production line helps to realize the resource utilization of agricultural waste, reduce environmental pollution, and promote the sustainable development of agriculture. This helps farmers get a steady return on their land over the long term.

5. Increase employment opportunities: The construction and operation of organic fertilizer production lines provide local employment opportunities and increase farmers' non-agricultural income.

6. Market demand growth: With the increase of consumer demand for green and organic food, agricultural products grown with organic fertilizers are more popular, and farmers can sell these products at higher prices and increase their income.

In summary, organic fertilizer production lines have played a positive role in improving farmers' income by improving crop yield and quality, reducing production costs, improving soil fertility, increasing employment opportunities, enjoying policy support and increasing market demand.