I'm pretty sure that receptors for nonsteroid hormones are located in <span>association with a cell's plasma membrane</span>. According to its definition.
As a majority of soils in tropics are of the Alfisols and the Ultisols. These soils are old and have lower fertility, but due to the presence of the dry season, the nutrients can stay in place. In the tropical rain forest, most of the time have sufficient rains but the soil lacks organic matter as they fast decomposition processes.
