Describe the environmental conditions that may lead to low crop yields

Describe the environmental conditions that may lead to low crop yields

1. Poor soil fertility due to lack of manure and fertilizer application.
2. Less rainfall/unreliable rainfall/too much rainfall.
3. Poor soil type leads to water logging or excess leaching.
4. Inappropriate pH/poor soil pH.
5. Pest attack
6. Poor weed control leads to competition.
7. Too high or low temperature / inappropriate temperature.
8. The excess wind increases evapotranspiration/lodging of crop/floral abortion.
9. Inappropriate humidity, either too high or too low.
10. Extreme light intensity may reduce photosynthesis/exhaustion of nutrients.
11. Inappropriate topography may limit crop growth.
12. Hailstorm damage.