What Is Agricultural Science? Research Areas, Funding, and Career Paths

Agricultural science is the branch of applied biology concerned with producing food, fiber and other plant and animal products reliably, safely and sustainably. It draws on genetics, soil chemistry, ecology, animal physiology, engineering and economics, and applies them to a practical problem set: how to grow crops and raise livestock that meet human needs while managing land, water, pests and climate constraints. This guide gives a genuine, thorough answer to what agricultural science studies, covers its major subfields, and adds the research-administration layer generic overviews leave out: who actually funds agricultural research, the methods and tools the field relies on, and typical career and training paths into it.

What Is Agricultural Science?

Agricultural science is the systematic study of the biological, chemical, physical and economic processes involved in producing crops, livestock and other agricultural products. It is fundamentally an applied science: rather than pursuing knowledge of living systems for its own sake, agricultural science takes the tools of biology, chemistry and ecology and points them at a defined practical goal — reliable, efficient, sustainable food and fiber production — while managing the real-world constraints of soil, climate, pests, disease, labor and cost.

The field’s core questions include: How can crop yields be increased without degrading the soil or water resources that future yields depend on? How do plant and animal genetics interact with environment to determine productivity, and how can breeding or genetic tools improve that interaction? How do pests, pathogens and weeds compete with crops and livestock, and how can that competition be managed with the least collateral damage to ecosystems and human health? How should land, water, fertilizer and labor be allocated to make farming both productive and economically viable? Answering these questions requires controlled field and laboratory experimentation, long-term observational trials (some agricultural field trials have run continuously for over a century), and increasingly, large-scale data analysis linking genetics, environment and management practice to outcomes.

Agricultural science is not the same thing as farming itself, though the two are tightly linked: farming is the practice, agricultural science is the research base — largely produced at land-grant universities and government laboratories — that informs which varieties, inputs and practices actually work, and why.

How Agricultural Science Relates to Neighboring Disciplines

Agricultural science sits inside applied biology and draws heavily on several neighboring fields, and the boundaries between them are genuinely blurry rather than sharply defined:

• Biology is agricultural science’s parent discipline: plant physiology, genetics, microbiology and ecology all underpin crop and livestock science directly. See this site’s companion guide, What Is Biology?, for the broader biological foundation agricultural science specializes from.
• Botany supplies much of the plant-science foundation — taxonomy, physiology and reproduction of the crop species agronomy and horticulture work with; see this site’s discipline guide on What Is Botany?.
• Geology and soil science overlap where agricultural science studies soil formation, structure and fertility as the physical medium crops grow in; see What Is Geology? for the earth-science foundation.
• Bioinformatics increasingly underlies plant and animal breeding, where genomic selection and marker-assisted breeding depend on the same sequence-analysis and computational tools used across biology; see What Is Bioinformatics?.
• Economics shapes agricultural science through agricultural economics and farm-management research, which studies how production decisions respond to prices, policy and risk.

Major Subfields of Agricultural Science

Agricultural science is not one discipline but a cluster of specialized subfields, each with its own research base and professional community:

• Agronomy — field-crop production and management: soil fertility, crop physiology, cropping systems, and the agricultural techniques used to grow grains, oilseeds and forage crops at scale.
• Animal science — livestock genetics, nutrition, physiology, reproduction and welfare, covering species from cattle and poultry to swine and aquaculture.
• Soil science — the physical, chemical and biological properties of soil, including fertility management, soil conservation and the soil microbiome’s role in plant health.
• Plant pathology and entomology — the diseases and pests that affect crops, and the biological, chemical and cultural methods used to manage them (integrated pest management, or IPM, is the dominant modern framework).
• Horticulture — the science of fruit, vegetable, ornamental and nursery crop production, distinct from agronomy’s focus on broadacre field crops.
• Agricultural and biosystems engineering — irrigation, mechanization, precision-agriculture technology and post-harvest handling systems.
• Food science and technology — the processing, safety and quality of agricultural products once harvested, bridging agricultural science and the food supply chain.
• Agricultural economics — farm management, commodity markets, agricultural policy and the economics of resource use in production.

How Agricultural Science Research Is Funded

Agricultural science has a distinct funding landscape from most other sciences, anchored in a mission agency rather than a general-science funder:

• USDA’s National Institute of Food and Agriculture (NIFA) is the primary federal funder of extramural agricultural research in the United States. Its flagship competitive program is the Agriculture and Food Research Initiative (AFRI), established by the 2008 Farm Bill and reauthorized by the 2018 Farm Bill with a mandated annual funding level of $700 million (actual annual appropriations have generally run below that ceiling). AFRI is organized around six Farm Bill priority areas — Plant Health and Production and Plant Products; Animal Health and Production and Animal Products; Food Safety, Nutrition, and Health; Bioenergy, Natural Resources, and Environment; Agriculture Systems and Technology; and Agriculture Economics and Rural Communities — funded through three divisions: Foundational and Applied Science, Education and Workforce Development, and Strengthening Agricultural Systems, alongside a separate Food and Agricultural Sciences Enhancement (FASE) track. A distinguishing feature of AFRI review versus NIH or NSF: proposals must build an explicit, sustained case for relevance to agriculture, food systems or rural communities throughout the narrative, rather than addressing that relevance in a separate, siloed review criterion.
• USDA’s Agricultural Research Service (ARS) is the department’s own in-house (intramural) research agency, running laboratories directly rather than funding external investigators, and works alongside NIFA’s extramural grants.
• The National Science Foundation (NSF), chiefly through its Directorate for Biological Sciences, funds fundamental plant, environmental and organismal biology research that is agriculturally relevant even where it is not agriculture-specific by mission — genomics, plant-microbe interactions and ecosystem science funded by NSF often underpins later applied agricultural work.
• Land-grant universities, established under the 19th-century Morrill Act system, are the backbone of the US agricultural research and extension infrastructure, combining federally supported research stations with Cooperative Extension services that translate research into on-farm practice.
• Private and philanthropic funding exists but is smaller and more targeted than in biomedical research; the Foundation for Food and Agriculture Research (FFAR), created as a public-private-partnership nonprofit under the 2014 Farm Bill, is a notable example, matching non-federal funds to competitive grants in food and agriculture science.

This funder mix is worth understanding on its own terms: unlike biomedical research, where NIH dominates, agricultural science funding is spread across a mission agency (USDA/NIFA), a general-science funder (NSF) playing a smaller, more upstream role, university-based land-grant infrastructure, and a comparatively thin layer of private philanthropy.

Common Research Methods and Tools in Agricultural Science

Agricultural science research spans field, laboratory and computational methods:

• Field trials — the discipline’s signature method: crop varieties, fertilizer rates or management practices tested in replicated field plots, typically using randomized block or split-plot experimental designs to control for soil and environmental variation across a field.
• Greenhouse and growth-chamber studies — controlled-environment experiments that isolate specific variables (temperature, light, water stress) that are difficult to control in open field conditions.
• Soil and plant-tissue analysis — laboratory testing of nutrient content, pH, organic matter and contaminant levels, used both in research and in on-farm decision-making.
• Genomics and molecular breeding tools — marker-assisted selection, genomic selection and (where regulatory frameworks permit) gene-editing techniques used to accelerate crop and livestock improvement.
• Remote sensing and precision-agriculture technology — satellite and drone imagery, yield-monitoring sensors and GPS-guided equipment that let researchers and farmers measure variability within a field rather than treating it as uniform.
• Animal trials — controlled feeding, breeding and management studies in animal science, typically subject to institutional animal-care oversight comparable to other animal research.
• Statistical and data-analysis methods — analysis of variance (ANOVA) and mixed-effects models remain central to interpreting replicated trial data, alongside newer machine-learning approaches applied to large genomic and remote-sensing datasets.

Career and Training Pathways

Formal training in agricultural science typically starts with a bachelor’s degree in agronomy, animal science, agricultural and biosystems engineering, horticulture, or a general agricultural science program, most commonly at a land-grant university. Graduate programs (MS and PhD) specialize further into a subfield — plant breeding, soil science, animal nutrition, agricultural economics and similar — and typically combine coursework with a substantial thesis or dissertation research project, often tied to field-trial or laboratory work at an experiment station.

Career paths include university and USDA-ARS research positions, Cooperative Extension roles that connect research to farmer practice, agribusiness and biotechnology industry research and development, crop consulting and agronomy advising, and regulatory or policy roles at USDA and related state agencies. Long-established professional societies serve the field’s major subdisciplines, including agronomy, crop science and soil science organizations that hold conferences and publish peer-reviewed journals central to the field’s literature; researchers new to the field can generally identify the relevant society through their specific subdiscipline (agronomy, crop science, soil science, animal science, entomology and horticulture each have their own established professional societies) rather than a single body covering all of agricultural science.

Frequently Asked Questions

What is agricultural science in simple terms?

Agricultural science is the study of how to grow crops and raise livestock effectively and sustainably, applying biology, chemistry, ecology and engineering to the practical problems of food and fiber production.

What are the main branches of agricultural science?

The major subfields are agronomy, animal science, soil science, plant pathology and entomology, horticulture, agricultural and biosystems engineering, food science, and agricultural economics.

Is agricultural science the same as agronomy?

No. Agronomy is one subfield of agricultural science focused specifically on field-crop production and soil management; agricultural science is the broader umbrella that also includes animal science, horticulture, agricultural engineering and other subfields.

Who funds agricultural research?

In the United States, the primary federal funder is USDA’s National Institute of Food and Agriculture (NIFA), chiefly through its Agriculture and Food Research Initiative (AFRI), alongside USDA’s own intramural Agricultural Research Service (ARS), a smaller contribution from NSF’s biological sciences programs, land-grant university research stations, and private foundations such as FFAR.

What jobs can you get with an agricultural science degree?

Common paths include university or USDA-ARS research, Cooperative Extension work, agribusiness and agricultural biotechnology R&D, crop or livestock consulting, and regulatory or policy roles at USDA and state agriculture agencies.

Related Guides

This guide is part of a series covering major scientific disciplines from a research-administration perspective — see the overview guide to the branches of science for how agricultural science relates to neighboring fields, this site’s What Is Biology? guide for its parent discipline, and these companion discipline guides: What Is Botany?, What Is Geology?, and What Is Bioinformatics?. For the broader research-methods cluster this guide belongs to, see the Research Methods & Statistics hub.