What is a disadvantage of Strill Till placed phosphorous?

Choosing the option that indicates a disadvantage of strill till placed phosphorus highlights an important consideration in nutrient management strategies. When phosphorus is placed in a narrow band, such as in a strill till system, it may not be as readily available to all plants, especially if they are not positioned close to that band. As a result, crops that are not directly accessing that band of phosphorus can experience a yield drag, meaning that their growth may be negatively impacted compared to crops that receive the optimal nutrients they need.

In contrast, other options suggest benefits rather than disadvantages. For instance, better nutrient retention refers to the practice's ability to hold onto nutrients in the soil, which is beneficial for crop health. Similarly, decreasing potential for crop toxicity and increasing efficiency of nutrient application both indicate more advantageous characteristics associated with careful nutrient placement rather than drawbacks. Therefore, the observation that yield may be hindered when phosphorus is placed in only certain zones of tillage serves to underscore the complexities involved in nutrient management practices.