8Meshkat M,Warner R C,Workman S R.Evaporation reduction potential in an undisturbed soil irrigated with surface drip and sand tube irrigation[J].Trans of the ASAE,2000,43(1):79-86.
9Michael A B,Bruce G S,David G B.Soil pits as a simple design aid for subsurface drip irrigation systems[J].Irrig Sci,2003,22:135-141.
10Gardner W R,Mayhugh M S.Solution and tests of the diffusion equation for the more meat of water in soil[J].Soil Sci Soc Amer proc,1958,22:197-201.