State twenty very cheap research topics for plant breeders?

1. Investigating the effects of different fertilizers on plant growth
2. Studying the impact of varying watering schedules on plant development
3. Analyzing the benefits of companion planting for increased crop yield
4. Examining the effectiveness of natural pest control methods on plant health
5. Investigating the potential of crossbreeding different plant varieties for improved traits
6. Studying the role of soil pH levels on plant nutrient uptake
7. Analyzing the impact of different light conditions on plant growth
8. Investigating the benefits of using organic vs. synthetic fertilizers on plant health
9. Studying the effects of climate change on plant adaptation and resilience
10. Analyzing the genetic diversity of wild plant populations for potential breeding purposes
11. Investigating the effects of different pruning techniques on plant productivity
12. Studying the impact of soil compaction on plant root development
13. Analyzing the benefits of using cover crops for soil health and fertility
14. Investigating the potential of using plant hormones for improved growth and development
15. Studying the effects of different mulching materials on plant growth
16. Analyzing the impact of plant spacing on crop yield
17. Investigating the benefits of using mycorrhizal fungi for plant nutrient uptake
18. Studying the effects of different irrigation methods on plant water usage
19. Analyzing the potential of using plant tissue culture for rapid propagation
20. Investigating the benefits of using biochar for soil amendment in plant breeding.