A hand holds strawberries over a strawberry field, in which a sensor is attached to a wooden post.
Smart Agriculture

More sleep for growers

Bosch helps optimize the strawberry crop

5 minutes

Lower costs, less frequent frost damage, higher yields — this is the benefit of farmer Martin Bauer, since he uses the new sensor system from Deepfield connect. It tracks soil moisture as well as humidity and temperature and he receives the data by smartphone.

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Farmer Martin Bauer in his strawberry field.
Farmer Martin Bauer on one of his strawberry fields in Weinstadt.

Renningen and Weinstadt, Germany — For the grower Martin Bauer, it was not that long ago that strawberry season meant one thing: sleepless nights. Between mid-March and late May, when the plants flower, he would have to work ten to fifteen night shifts. Fearing that his strawberry plants could fall victim sub-zero temperatures at night, he would drive out to his fields around the German town of Weinstadt, near Stuttgart. If a check of air temperature revealed it was zero degrees Celsius or colder, he would cover the long rows of strawberries with fleece. “Frost would ruin everything,” Bauer says. He knows what he is talking about: every two to three years he used to experience a loss of his strawberry crop — posing a serious threat to his livelihood.

50 to 70 percent

of his entire strawberry crop did Martin Bauer lose every two to three years.

However, Bauer no longer has to worry. On six of his twelve fields, a Bosch sensor system now monitors the condition of his strawberry plants. “The app that comes with the system lets me check on my plants from home — while sitting comfortably on my couch or under the bedclothes, so I don’t disturb my wife’s sleep,” Bauer says. “This doesn’t only make life easier for me. In the old days, 20 helpers used to have to regularly drive out to the fields with me at night.” Lessons learned from the six fields equipped with sensors can be applied to the other six; Bauer selected the fields with local climatic fluctuations in mind.

Sensor system measures temperature and humidity

A smartphone and a strawberry are held by two hands over a strawberry field.
With an app, the farmer can see at a glance whether everything is okay in his fields.
A white sensor was attached to a post in the strawberry field.
Behind the inconspicuous exterior, high-performance sensors are hidden.

The sensor system is the brainchild of the Deepfield Connect, a former Bosch start-up. The sensors measure the amount of moisture in the soil and inform the grower if it is too dry. They also measure air temperature and humidity and use that in order to calculate wet-bulb temperature. “If this temperature is zero degrees Celsius or below when the plants are beginning to flower, the grower has to cover the plants or take other steps to protect them from frost,” says Christian Glunk from Deepfield Connect. The grower is also informed if the plants are too warm. Growers themselves can set the threshold values that will trigger an alert. In that case, growers can remove the coverings to ensure the sensitive plants are properly ventilated. And by tracking temperature and humidity records, growers can check whether everything is progressing smoothly or if there is a risk of mildew. “None of this requires any manual measurements,” Glunk says.

What’s more, the system can be used for other plants. Fruit growers could also use the sensors to monitor the development and growth of currants or raspberries. For Martin Bauer, this is a tempting idea — after all, he grows raspberries, too.


The sensor system of Deepfield Connect enables fruit growers to monitor their fields with the smartphone. This allows them to react to temperature fluctuations and prevent the harvest from being damaged.

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