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.
2.1.1. A shell script is a sequence of commands for which you have a repeated use. This sequence is typically executed by entering the name of the script on the command line. Alternatively, you can use scripts to automate tasks using the cron facility.Another use for scripts is in the UNIX boot and shutdown procedure, where operation of daemons and services are defined in init scripts. To create a shell script, open a new empty file in your editor.his sequence is typically executed by entering the name of the script on the command line. Alternatively, you can use scripts to automate tasks using the cron facility. Another use for scripts is in the UNIX boot and shutdown procedure, where operation of daemons and services are defined in init scripts.