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Effect of drought and heat stress on crop nutrients.
| Stress | Process affected | Nutrient loss |
|---|---|---|
| Drought | Soil integrity by erosion | Loss of all mineral nutrients |
| Drought and heat | Transpiration driven mass flow | Mobile nutrients such as Ca, Mg, Si, nitrates, and sulfates |
| Drought and heat | Root growth | Almost all nutrients especially P and K |
| Drought and heat | Biological nitrogen fixation | N |
| Drought and heat | Soil microbial activity | N |
| Heat | Plant phenology | N, P, K |
| Heat | Nitrate reductase activity | N |
