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Water moves in soil in response to potential gradients. The basic equation for this movement is the generalized flow equation: v = - KV0 in which v is volume of water passing through a unit area in unit time, K is the conductivity coefficient, V is the gradient operator (vector), and V 0 is the potential gradient.doi:10.26076/ba46-2fb7 fatcat:vc43fzbctzd67bc62nmcut2bfy