Stochastic simulation of soil moisture dynamics in farmland in the eastern region of the Songnen Plain.

70.77%, 13.89%, 6.49%, and 8.85% respectively, and the proportion of precipitation amount and the number of precipitation occurrences show a decreasing trend with the increase of precipitation level. 3.2 Characterization of soil moisture dynamics and probability distribution 3.2.1 Soil moisture dynamic distribution patterns Changes in soil water content at different depths during the maize reproductive period from 2020 to 2022 in the study area are shown in Fig 3 .

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Early June to late July into the rapid development of maize, soil water content showed a trend of slow increase. late July to mid-August growth in the middle, the corn entered the critical stage of growth and development, water consumption increased, soil water content slowly decreased. mid-August to the end of September corn growth in the late stage, and water consumption decreases, but precipitation during the same period decreases as well, soil water content gradually stabilized.

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