Water stress in crops
Water stress is a crucial issue for farmers and growers. This page explains what it is, how it affects crops and how technology helps overcome it: through more efficient water use and timely action that meets the plants’ needs, for better-quality harvests.
Key indicators
| Indicator | Value |
|---|---|
| Causes of water stress | 3: low rainfall, inadequate supply, poor water management |
| Physiological effects on the plant | 5: less photosynthesis, stomatal closure, reduced growth, survival strategies, lower nutrient uptake |
| Impacts on crops | 6: growth, yield, pests and diseases, quality, tolerance to extremes, yield stability |
| Technology-based mitigation strategies | 5: soil moisture monitoring, irrigation scheduling, rainwater harvesting, drip irrigation, resistant varieties |
| Effects on farm productivity | Lower yields · lower quality · more pests and diseases · higher production costs |
| Data from soil moisture sensors | Real-time, across different areas of the field |
| First step to prevent stress | Monitor soil moisture |
What is water stress?
Water stress is a lack of the water crops need for optimal growth and development. It can be caused by low rainfall, inadequate supply or poor management of water resources. It occurs when plants cannot access the amount of water their physiological needs require.
How the plant responds
- Reduced photosynthesis: plants need water to turn sunlight into energy. Under water stress, photosynthesis slows down and less carbohydrate and energy is left for growth.
- Stomatal closure: to lose less water through transpiration, the plant closes its stomata, the tiny openings in its leaves. This also lets in less of the carbon dioxide needed for photosynthesis.
- Reduced growth and development: lack of water slows cell elongation. Plants stay shorter, leaves are smaller, and flowers and fruit develop less.
- Survival strategies: the plant builds up protective compounds such as abscisic acid and produces osmoprotectants to keep its cells turgid.
- Lower nutrient uptake: with little water in the soil the plant absorbs fewer nutrients, becomes deficient and weakens further.
Impact on crops
- Less growth: smaller, less productive plants
- Lower yield: less fruit and grain to harvest
- More pests and diseases: weakened plants get sick more often and may need extra treatments
- Lower quality: a poorer product fetches a lower market price
- Less tolerance to extremes: plants cope worse with prolonged drought and very high temperatures
- Unstable yields: yields swing from year to year, making planning difficult
Strategies to overcome water stress
- Soil moisture monitoring: sensors provide real-time data on soil conditions across different areas of the field, so you know when and how much to irrigate.
- Irrigation scheduling: moisture data lets you build an irrigation plan tailored to the crop’s needs, avoiding both overwatering and stress.
- Rainwater harvesting and storage: lets farmers use rainwater during dry spells and rely less on external sources.
- Drip irrigation: delivers water directly to the base of the plants, minimises evaporation losses and makes the most of available water.
- Drought-resistant varieties: plant breeding has produced varieties that grow with less water, ideal for drought-prone areas.
Across all these actions, training the work team is key, to raise awareness of optimal, sustainable water use and of the tools that make efficient water management possible.
Conclusions
Water stress weighs on farm productivity: it lowers yields and quality, raises the risk of pests and diseases and drives up production costs through extra irrigation or treatments. With climate change it is a crucial challenge for growers worldwide. Over the last decade, however, technology has advanced significantly and now offers innovative solutions to manage and mitigate it.
The Finapp impact
- Contactless soil water measurement based on Cosmic Ray Neutron Sensing
- Data on the water available at the plant root zone, to irrigate at the right time
- Less water waste and lower energy costs
- Higher productivity and better-quality harvests
Want to protect your crops from water stress? Finapp can help you choose the most innovative solution for soil moisture monitoring.