Which type of soil can cause lateral movement (water travels sideways) to ditches carrying nutrients with it?

Sandy soil

Explanation:

Water movement in soils is called soil hydrology. The soil texture, the soil structure and gravity affects soil hydrology.

In sandy soil, the particles are largest compared to other types of soils, and these particles are held loosely together.

Water will move laterally in the soil profile if there is enough pore space in that soil (which sandy soils possess). This movement is aided by the capillary action of water in small spaces. The water will bind to the edges of the pores and slowly move laterally and even upward if the voids are small enough.

81 is a composite number.