Issue link: http://read.dmtmag.com/i/64944
T o access the Irrigations Scheduler Mobile, visit: http://weather.wsu.edu/is. Figure 1 (above left): iPhone screenshot of the Daily Budget Table screen. As the soil water content gets near the point where the plant will see water stress, the lines change from green (good) to yellow (warning), and then to red when the model estimates that the plant is water stressed. The Edit button is used to add irrigation amounts or a soil moisture measurement to correct the model on that date. Selecting the date gives more model information. Figure 2 (lower right): iPhone screenshot of the Soil Water Chart. The estimated soil water content is plotted in relation to the field capacity, the management allowable deficit (point where the tree or vine will begin to see water stress), and the wilting point (point where the tree or vine dies). Also plotted are irrigation and rainfall events. All of these increase with a growing root zone. The most important screens for the user will likely be the Daily Budget Table (Figure 1) and the Soil Water Chart (Figure 2). The model also outputs graphs of: the daily crop water use; the cumulative water use; the crop coeffi- cients and root zone depth over time; the estimated amount of water lost to deep percolation; and the degree of water stress and estimated yield loss to the crop due to water stress. Online help for each screen is available within the irri- gation scheduler mobile application. A full help manual is also available online at http://weather.wsu.edu/is/ISM Manual.pdf. For additional help, or if you would like to submit any questions or comments, please contact Troy Peters at troy_peters@wsu.edu, or at (509) 786-9247. • www.goodfruit.com GOOD FRUIT GROWER MAY 15, 2012 43 coUrteSy of WSU