Trainers help athletes maintain their bodies or work toward a specific goal. Agricultural Engineers are involved in designing agricultural machines and equipment and supervising their production, developing plans for farm buildings, power stations and irrigation and drainage systems, working on soil and erosion projects or genetic experiments to enhance crop or livestock production. Agricultural Scientists study how plants and animals respond to their environment and use the results of these studies to improve the quality of plants, animals, foods and drugs. Horticulturists attempt to improve the growth, size, and resistance to disease of flowers, vegetables, fruits and nuts by producing better genetic strains of plants. Soil Scientists analyze and determine the best methods of managing soil to prevent erosion or nutrient depletion.
Entomologists study the characteristics and behavior of insects.
They research plant diseases, pests, and weeds and also analyze the soil. Veterinarians deal with the recognition, treatment, control and prevention of diseases in animals. Ecologists explore the relationship between organisms and their environments. Embryologists study the development of an animal from a fertilized egg through its eventual birth. Conservationists manage rangelands to ensure prudent use of livestock and wildlife, and protect habitats in the wild.