Farm drainage The Principles, Processes, and Effects of Draining Land with Stones, Wood, Plows, and Open Ditches, and Especially with Tiles

CHAPTER XVIII.

Chapter 1869 wordsPublic domain

OBSTRUCTION OF DRAINS.

Tiles will fill up, unless well laid.--Obstruction by Sand or Silt.--Obstructions at the Outlet from Frogs, Moles, Action of Frost, and Cattle.--Obstruction by Roots.--Willow, Ash, &c., Trees capricious.--Roots enter Perennial Streams.--Obstruction by Mangold Wurtzel.--Obstruction by Per-Oxide of Iron.--How Prevented.--Obstructions by the Joints Filling.--No Danger with Two-Inch Pipes.--Water through the Pores.--Collars.--How to Detect Obstructions.