Fertilizers and pesticides applied to crops eventually may reach underlying aquifers, particularly if the aquifer is shallow and not protected by an overlying layer of lowpermeability material, such as clay. Drinking-water wells located close to cropland sometimes are contaminated by these agricultural chemicals.
script - a written version of a play or other dramatic composition; used in preparing for a performance playscript, book dramatic composition, dramatic work - a play for performance on the stage or television or in a movie etc.
Shell Scripts. A shell script is a file containing a series of commands that together perform a function. You can access a Korn shell script from the command line if you are running the Korn shell and have permission to execute the script by typing the file name.