Historically, Farm Tillage Tools Were Designed Without Scientific Knowledge Of How Tools Work The Soil. Thus, A Tool Designed To Operate In One Soil Pulled By A Mule Might Not Operate Satisfactorily In Another Soil Or When Pulled By A Tractor At Higher Speeds. Traction And Flotation Problems Appeared With The Introduction Of Tractors. The Importance Of Developing A Scientific Approach To The Study Of Tillage And Traction Became Apparent During The Transition From Animal To Mechanical Power.
The Rain Bird horizontal action impact drive sprinkler head was invented in 1933 by Orton Englehardt, a citrus grower and native of Glendora. The design offered slow rotation and uniform watering, benefits long sought by local irrigators. Clement M. LaFetra, a friend of Englehardt, urged early patent application. A patent was awarded on December 18, 1933. Englehardt, with no entrepreneurial aspirations, assigned all rights to LaFetra and his wife Mary Elizabeth. Production began in the LaFetra family barn on October 13, 1935.
Preventing Wind Erosion Was The Primary Objective Of Fred Hoeme, a Hooker, Oklahoma Farmer, When He Developed A Heavy-Duty Chisel Plow In 1933. Hoeme And His Sons Manufactured And Sold About 2000 Plows From Their Farmstead. In 1938, W. T. Graham Purchased The Manufacturing And Distribution Rights And Established Manufacturing In Amarillo, Texas. The Graham-Hoeme Plow, Marketed As "The Plow To Save The Plains", Was Sold Worldwide.