Which of the following are common types of seed treatments?

Common types of seed treatments are primarily focused on protecting seeds from diseases, pests, and environmental stresses before germination. Chemical treatments and biological treatments are two widely recognized categories in this context.

Chemical treatments involve the application of various chemical substances, such as fungicides and insecticides, which effectively reduce the risk of disease and pest infestations. These chemicals can protect seeds during storage and improve germination rates by creating a more favorable environment for the seedling development.

Biological treatments, on the other hand, typically utilize natural organisms or their byproducts, such as beneficial bacteria or fungi, that help in promoting seed health and enhancing plant growth. These treatments often work by establishing a beneficial relationship with the plant that can increase resistance to pathogens and improve nutrient uptake.

Other options mentioned include various types of treatments that, while important in agricultural practices, do not specifically fit the common definitions of seed treatments as recognized in the industry. For instance, physical and thermal treatments, while they might be used in seed preparation, are not as prominent as chemical and biological methods in primary seed treatment practices.