Influence of soil bulk density on distribution and uniformity of water and nitrogen under film hole irrigation with fertilizer liquid free infiltration

Based on the indoor experiments,the influences of soil bulk density on distribution and uniformity of soil moisture,NO3--N and NH4+-N under film hole irrigation with fertilizer liquid free infiltration were studied.The results showed that soil moisture and NH4+-N decreased around the film hole;NO3--N first increased and then decreased around the film hole;the lager the soil bulk density was,the smaller the distribution distance of soil...