The Department of Agronomy and Horticulture (1968-2003) was a department under the College of Biology and Agriculture at Brigham Young University.

In 1968 the College of Biological and Agricultural Sciences combined the Department of Agronomy and the Department of Horticulture into the Department of Agronomy and Horticulture. In 2003 it became a part of the Department of Plant and Animal Sciences. Department chairmen included Rudger H. Walker (1968-1972), Laren R. Robison (1972-1984), Rodney D. Horrocks (1984-1990), Richard E. Terry (1990-1999), Von D. Jolley (1999-2003).

The Department of Agronomy and Horticulture offered students the option of majoring in either Agronomy or Horticulture. The purpose for the Agronomy major was to provide a framework of fundamental principles of soil science, field crop production, and their interrelationships. The Horticulture major offered four options: fruit and vegetable production; floriculture and greenhouse management; ornamental horticulture and nursery management; and turf and part management.

The department was administered by a department chairman, under the direction of the college dean. The department was associated with a number of colleges during its existence, including the College of Biological and Agricultural Sciences (1968-1983) and the College of Biology and Agriculture (1983-2003).

The Department of Plant and Animal Sciences (2003-2007) was a department under the College of Biology and Agriculture at Brigham Young University.

The Department of Plant and Animal Sciences was established in 2003 when the Department of Animal and Veterinary Sciences,the Department of Botany and Range Science, and the Department of Agronomy and Horticulture were amalgamated under the direction of the College of Biology and Agriculture. In 2007, the department was renamed the Department of Plant and Wildlife Sciences. Department chairmen included Von D. Jolley (2002-2004), Sheldon D. Nelson (2004-2007), and Val J. Anderson (2007-2008).

The Department of Plant and Animal Sciences was established with the purpose of preparing students to enter the fields of bio-agribusiness management, biotechnology, environmental soil science, landscape management, and plant biology. Courses included: living with plants, landscape design graphics, residential landscape design, floral design, world food crops, herbaceous plants, landscape structures, interior landscapes, landscape bidding and estimating, genomics, soil science, plant growth and reproduction, soil genesis and taxonomy, soil fertility and plant nutrition, turf science, arboriculture, plant pest control, plant production, plant community design, urban soils and water, integrated management of plant pests, plant physiology, animal breeding and genetics, plant breeding and biotechnology, plant cell biology, animal biotechnology, soil physics, soil microbiology, saline and sodic soils, plant development, plant molecular breeding, cytogenetics, plant transformation, and experimental design and data analysis.

The Department of Animal Science (1964-2001) was a department within the College of Biological and Agricultural Sciences at Brigham Young Unviersity.

The Department of Animal Science was established in 1964 by the College of Biological and Agricultural Sciences. This newly created department replaced the Department of Animal Husbandry. The department was administered by a department chair, under direction of the college dean. The department was associated with the College of Biological and Agricultural Sciences (1964-1983) and the College of Biology and Agriculture (1983-2001). In 2001, the department became a part of the Department of Animal and Veterinary Sciences. Department chairs included R. Phil Shumway (1964-1975), Merlin Myers (1975-1976), Leon E. Orme (1976-1984), Keith D. Hoopes (1984-1986), Max V. Wallentine (1986-1989), N. Paul Johnston (1989-1995), Richard N. Thwaits (1995-2000), and David Kooyman (2000-2001).

The Department of Animal Science included courses on principles of animal production, fundamentals of animal breeding, feeds and feeding, livestock and meat evaluation and selection, animal physiology and anatomy, animal hygiene, consumer and institutional meats, meat and meat products, meat processing methods, horse husbandry, beef cattle production, sheep production, swine production, elements of dairying, milk and milk processing, poultry production, reproductive physiology of domestic animals, animal nutrition, animal breeding, and management of ranch resources.