True or False: Pesticide adsorption is greatest in coarse, sandy soil.

Pesticide adsorption refers to the process by which pesticides bind to soil particles. Coarse, sandy soils have larger particle sizes and greater spaces between these particles, which generally leads to lower adsorption of pesticides compared to finer-textured soils like clay or loamy soils.

In sandy soils, there are fewer surface areas available for the pesticides to adhere to, and the larger pore spaces allow for quicker drainage and leaching of pesticides, meaning they do not bind as tightly. On the other hand, finer soils, such as clay or loam, have more surface area and smaller pores, enabling greater interaction between the pesticide molecules and the soil particles, leading to higher levels of adsorption.

Hence, stating that pesticide adsorption is greatest in coarse, sandy soil is incorrect, making the statement false. Understanding the particle size and structure of different soil types is crucial for recognizing how they influence pesticide behavior in the environment.