Original sentence: Lindsay Irrigation Home Page.Lindsey Corporation produces a center pivot under the trade name Zimmatic.Reinke Irrigation Home Page.Reinke Irrigation also produces a center pivot.Reinke and Zimmatic compete to share between 30-40% of the irrigation market.Reinke is a privately held company which limits the ability for market researches to determine the exact number of center pivot sold.T-L Irrigation Home Page.T-L Irrigation manufactures a hydraulically driven irrigator that is sold through a small network of farmer dealers who make up about 5% of the irrigation market share.T-L does not support a network of professional dealers as do Valley, Zimmatic, and Reinke.The leader in this market is Valmont Industries who produces center pivots under the trade name Valley.Today four major manufactures build center pivot products in the United States.Valley Irrigation Home Page.Valley, Zimmatic, and Reinke manufacture modern irrigation equipment and consume about 95% of the total market while one other manufacture still clings to the archaic hydraulic drive system.Valmont claims a market share between 55-65% of all new center pivots sold in the United States.You Tube Valley Pivot Erection  Video showing erection of Valley Center Pivot