Overview of Irrigation modes for DroughtSpotter and FieldScale


Both DroughtSpotter and FieldScale can apply different irrigation modes for each plant for a high precise watering regime. There are 5 different irrigation modes available in the PHENOSPEX software that are explained in this article. 

Hold mode

In hold mode a plant is watered at a defined time per day up to a certain target weight. The graphic below illustrates an example for an irrigation in Hold mode. The dashed line represents the configured target weight for the plant. The green line shows the actual weight of the plant. There are three watering times defined at 6:00h, 12:00h and 18:00h on this date. During these times the plant is rewatered up to the defined target weight. The amount if water given is equivalent to the difference between target weight and weight before watering (represented as blue bars). See Experimental CSV Sheet for more details how to configure hold mode.

Fixed mode

In Fixed mode a plant is watered at defined times per day with a defined amount of water. The graphic below illustrates an example for an irrigation in Fixed mode. There are three watering times defined at 6:00h, 12:00h and 18:00h on this date. During these times the plant is watered with the specified amount (represented as blue bars). If the plant uses more water as shown in this example the overall weight will reduce over time. In fixed mode a maximum weight can be specified so avoid overflooding. See Experimental CSV Sheet for more details how to configure fixed mode.

Deviation Mode

One of the most powerful irrigation modes is the deviation mode. In this mode a target weight can be defined for each plant. Other than in Hold mode the plant will not be rewatered up to target weight at a specified time but whenever a threshold is reached. This way the plant can be kept at a very narrow and controlled water level. The graphic below illustrates an example for an irrigation in deviation mode. The dashed line represents the configured target weight for the plant. The green line shows the actual weight of the plant. The dotted line represents the lower threshold for the irrigation. Whenever the actual plant weight is lower than this threshold it will be rewatered up to target weight. The amount if water given is equivalent to the difference between target weight and weight before watering (represented as blue bars). See Experimental CSV Sheet for more details how to configure deviation mode.





Copy Mode

In copy mode there are two kinds of plants, pattern and copy plants. Pattern plants behave like in fixed mode. They will receive a defined volume of water at the defined time points. Copy plants can be configured to follow the weight of the pattern plants. The graphic below shows an example of two plants, one as patter and the other one as copy. The pattern plant uses more water than it receives on fix mode and therefore slowly dries down. The copy plant is rewatered at the defined time points up to the weight of the other plant. If the pattern plant has less weight as the copy plant during the irrigation time there will be no water added.   

No Irrigation Mode

In no irrigation mode a plant is not watered. The weight data will be recorded regardless of the missing irrigation.