French is the official language in 29 countries, most of which are members of la francophonie, the community of French-speaking countries.It is spoken as a first language in France, southern Belgium, western Switzerland, Monaco, certain parts of Canada and by various communities elsewhere.rench is the official language in 29 countries, most of which are members of la francophonie, the community of French-speaking countries.
Study sets matching term:drip+irrigation = most efficient method of irrigation
Drip and micro-spray irrigation systems apply water directly to the soil around the roots of plants, where it's needed. They're the most efficient form of irrigation, losing minimal water to evaporation and wind drift. Drip irrigation systems rely on a system of plastic pipes to carry water to plants. They apply water more slowly than sprinklers, and can use a lot less. Drip irrigation systems are easy to find and install, but do require periodic maintenance to make sure the emitters are working properly.