Boom sprayers are agricultural equipment used to apply pesticides, herbicides, and fertilizers over large fields. They consist of a long horizontal bar, or "boom," that extends across the width of the field, allowing for even distribution of liquids. The boom is equipped with multiple nozzles that spray the chemicals onto crops, ensuring efficient coverage. These sprayers can be mounted on tractors or towed behind them, making them versatile for different farming operations. By using boom sprayers, farmers can save time and labor while effectively managing crop health and maximizing yields.