What type of tractors are John Deere D?

The John Deere D series is a line of agricultural tractors manufactured by John Deere. The D series was introduced in 1923 and was produced until 1953. The D series tractors were available in a variety of models, including the D, DA, DB, DC, and DE. The D series tractors were powered by a variety of engines, including gasoline, diesel, and kerosene. The D series tractors were used for a variety of agricultural tasks, including plowing, planting, cultivating, and harvesting. The John Deere D series tractors were a popular choice for farmers due to their reliability, durability, and versatility.