Which of the following is a common method of phosphorus application?

Phosphorus application can be effectively achieved through various methods, each with its own set of advantages depending on the specific agricultural context, soil conditions, and crop requirements. Broadcasting involves evenly distributing phosphorus over the soil surface, which is a common method due to its simplicity and effectiveness in ensuring that phosphorus is available to plants.

Pot injection is another method that involves applying phosphorus directly into the root zone, which can enhance uptake by plants and reduce waste. This method is often beneficial for targeted applications in high-value crops.

Tillage incorporation refers to mixing phosphorus into the soil through tillage practices. This method can improve the availability of phosphorus by placing it in the root zone where plants can utilize it more effectively.

Since all of these methods—broadcasting, pot injection, and tillage incorporation—are recognized techniques for phosphorus application, selecting "all of the above" as the answer correctly acknowledges the variety of approaches that can be taken to manage phosphorus effectively in agricultural settings. Each method has its proper contexts and applications, making it important for farmers and agricultural professionals to understand and choose the appropriate technique based on their specific conditions.