Comprehensive Notes on the Definition, History, Branches, and Importance of Agriculture

Etymology and Conceptual Definitions of Agriculture

• Etymological Origin:

  • The English word agriculture is derived from two Latin words:

  • ager: meaning field, land, or open country.

  • cultura: meaning cultivation, tilling, or growing.

• General Definition:

  • Agriculture is the art, science, and business of managing the growth of plants and animals for human use.

  • It encompasses cultivating the soil, growing and harvesting crops, and breeding and raising livestock for human consumption and economic purposes.

  • It includes the preparation of plant and animal products for human use, as well as their packing, processing, and distribution to markets.

  • Agriculture extends far beyond basic farming.

• The Three Dimensions of Agriculture:

  • As an Art:

  • Embraces the knowledge and physical and mental skill required to perform farm operations in a skillful manner.

  • As a Science:

  • Utilizes modern technologies developed on scientific principles—including crop improvement/breeding, crop production, crop protection, and economics—to maximize yield and profit.

  • Integrates advanced scientific practices such as hybridization, transgenic crop development, and biotechnology.

  • As a Business:

  • Aims for maximum net economic return through the strategic management of land, labor, water, and capital.

  • Employs knowledge from various sciences to produce food, feed, fiber, and fuel, increasingly commercialized in modern times through mechanization.

Origins and History of Global Agriculture

• Timeline and Evolution:

  • Began over $10,000$ years ago.

  • Before agriculture, humans were strictly hunters and gatherers.

  • Humans discovered the value of wild plants and animals, subsequently domesticating and breeding them (including cereals, meat animals, poultry, fish, milk, cheese, nuts, oils, fruits, and vegetables).

  • Agriculture developed at multiple times across multiple regions, with the earliest developments taking place in Southwest Asia.

  • Pinpointing the exact absolute beginnings is difficult because the transition away from purely hunter-gatherer societies occurred thousands of years before the invention of writing.

• Drivers of the Transition from Hunting/Gathering to Farming:

  • Climate Changes: Shifts in climate made conditions too cold or too dry to rely consistently on wild food sources.

  • Population Density: Greater population density demanded more food than could be gathered from the wild. Farming provided $10$ to $100$ times more calories per acre, despite requiring more labor and energy.

  • Overhunting: Overhunting contributed to the extinction of woolly mammoths and other megafauna.

  • Technological Progress: Technological advancements, such as domesticated seeds, made agriculture a more viable and stable lifestyle.

• Key Archaeological Evidence of Early Agriculture:

  • Thailand: Artifacts and evidence dating back to $11,000\,\text{B.C.}$

  • The Near East: Sites located between the Tigris and Euphrates rivers in Iraq dating back to $9000\,\text{B.C.}$

  • Tehuacan Valley: Sites in Mexico dating back to $6,000\,\text{B.C.}$

  • The Philippines:

  • Beginnings associated with tool-making developments during the New Stone Age (Neolithic Age) starting in $6,000\,\text{B.C.}$

  • Intensified plant and animal domestication focused on root crops such as taro (gabi), yam (ubi), and upland rice as main staples.

• Civilizational and Societal Development:

  • Tied formerly nomadic populations to their land and fields, leading to the establishment of permanent villages linked by trade networks.

  • Highly successful agricultural economies supported dense populations, causing small settlements to expand into towns and cities.

  • The earliest societies based on intensive agriculture arose in the Fertile Crescent (spanning the Levant, modern-day Turkey, and Iran) and along the Nile River in Egypt.

  • Other early agricultural societies developed independently in Central America, East Asia, the Indus Valley, and West Africa.

Domestication of Plant and Animal Species

• Definition and Mechanics of Domestication:

  • Domestication is the adaptation of wild plants and animals for human use.

  • Domesticated species depend on humans for survival, their breeding is subjected to human control, their physical/genetic characteristics differ from their wild ancestry, and they are grown or raised for specific human purposes.

  • Hunter-gatherers began domesticating animals and altering natural environments even before settled farming became widespread.

  • Scientists determine domestication dates using Carbon-$14$ testing on plant and animal remains.

• Chronology of Animal Domestication:

  • Dogs: The first domesticated animals, initially used for hunting.

  • Sheep: Domesticated around $9000\,\text{B.C.}$ in Northern Iraq.

  • Goats: Domesticated around $8000\,\text{B.C.}$ in Iran.

  • Pigs: Domesticated around $8000\,\text{B.C.}$ in Thailand and $7000\,\text{B.C.}$ in Thessaly.

  • Cattle: Domesticated during the $6\text{th}$ millennium B.C. in Northeast Iran.

  • Predecessors of sheep, goats, cattle, and pigs were originally hunted for meat and hides.

  • They later provided secondary products such as milk, cheese, and butter.

  • Domesticated animals like oxen were eventually utilized for labor: plowing, pulling, and transportation.

  • Horses: Domesticated around $4350\,\text{B.C.}$ in Ukraine.

  • Llama and Alpaca: Domesticated during the $3\text{rd}$ millennium B.C. in the Andean region of South America.

• Chronology of Plant Domestication:

  • Early Crops: Barley, wheat, legumes, vetch, and flax were among the very first domesticated plants.

  • Maize (Corn): Domesticated approximately $9000$ years ago in Central America.

  • Wheat and Barley: Domesticated in the $8\text{th}$ millennium B.C. in the Middle East.

  • Squash: Domesticated around $8000\,\text{B.C.}$ in Mexico.

  • Legumes: Domesticated around $6000\,\text{B.C.}$ in Thessaly and Macedonia.

  • Millet and Rice: Domesticated around $5500\,\text{B.C.}$ in China and Southeast Asia.

  • Flax: Domesticated for textile production during the early Neolithic period.

• Pastoralism:

  • Represents a later historical development.

  • Mixed farming (combining crop cultivation and livestock raising) formed a common Neolithic pattern.

  • Nomadic herders roamed the steppes of Europe and Asia, where the horse and camel were domesticated.

  • The transition from hunting/gathering to full agricultural dependence was gradual and remains incomplete worldwide.

Modern Scientific Agriculture and Historical Milestones

• Colonial Agriculture ($15\text{th}$ to $19\text{th}$ Centuries):

  • Focused on feeding colonies, producing cash crops, and supporting the home country.

  • Key commodities included sugar, cotton, tobacco, tea, and livestock raised for wool and hides.

  • Utilized slave labor extensively on Caribbean sugar plantations and across North America.

• The Scientific Revolution in Agriculture:

  • Stated during the Renaissance and Age of Enlightenment in Europe.

  • Introduced systematic plant breeding, specialized livestock breeding (e.g., the Guernsey cow breed), crop rotations, and land drainage systems to expand cultivable land.

  • Key Technological Innovations:

  • Seed Drill: Introduced in the early $1700\text{s}$.

  • Livestock Breeding: Systematized in the $1700\text{s}$.

  • Soil Liming: Application of limestone to soils began in the late $1700\text{s}$.

  • Cast-Iron Plow: Invented in $1797$ by Charles Newbold; improved and manufactured from steel by John Deere in the $1830\text{s}$.

  • Mechanical Reaper: Invented by Cyrus McCormick in $1831$.

  • Chemical Pest Control: Development of chemical poisons for agricultural pests in the $19\text{th}$ century.

  • Steam Power: Replaced animal power for pulling plows and operating threshing machinery by the late $1800\text{s}$.

  • Transportation: Infrastructure improvements throughout the $19\text{th}$ and $20\text{th}$ centuries.

  • Agribusiness: Industrial scientific technology directly catalyzed mid-$20\text{th}$ century agribusinesses.

• Post-World War II Era:

  • Marked by the Green Revolution.

  • Introduced selective crop breeding via DNA technology.

  • Developed intensive cultivation methods and advanced agricultural machinery.

Branches of Agriculture

• Crop Science: Deals with economic plants (e.g., rice, jute, potato).

• Animal Husbandry: Deals with animal production and livestock management (e.g., cattle, buffalo, goat, poultry).

• Veterinary Medicine: Deals with animal diseases, medical treatments, and health management.

• Fisheries: Deals with pisciculture (the rearing, breeding, and management of fishes).

• Agricultural Engineering: Deals with farm mechanization, infrastructure, and machinery.

• Agricultural Economics: Deals with economic management, resource allocation, and marketing of agricultural commodities.

• Agro-forestry: Deals with integrated production systems combining agricultural crops and forest plants.

Comprehensive Importance of Agriculture

• Food and Human Nutrition:

  • Carbohydrates: Provided by cereals, potatoes, and sweet potatoes.

  • Proteins: Provided by meat, fish, eggs, milk, and pulses.

  • Fats: Derived from mustard, grape seed, soybean, groundnut, sunflower, and sesame.

  • Vitamins and Minerals: Sourced from various fruits, vegetables, milk, and butter.

• Clothing and Fiber Production:

  • Agriculture provides raw fibers for clothing.

  • $70\%$ of global fiber originates from cotton (Gossypium spp.).

  • Additional fiber sources include jute, wool, silk, and other natural plant/animal fibers.

• Housing and Structural Materials:

  • Provides essential materials for shelter construction to protect humans from wild animals, rain, sunshine, and cyclones.

  • Key materials include timber, bamboo, straw, and rope.

• Industrial Raw Materials:

  • Supplies raw inputs to diverse manufacturing industries:

  • Medicine Industry

  • Paper Industry

  • Rubber Industry

  • Soap, Candle, and Paint Industries

  • Perfume Industry

  • Beverage Industry

  • Bakery Industry

  • Sugar Industry

  • Narcotic Industry

  • Leather Industry

• Energy and Fuel Supply:

  • Provides fuel for brick fields (timber, jute-sticks, dry leaves).

  • Fossil fuels (coal, petrol, and natural gas) originate from ancient plant organic matter.

  • Biofuels: Biodiesel produced from plants such as Jatropha.

• Employment and Livelihoods:

  • Direct occupation in farming or agricultural product processing.

  • Around $62\%$ of people are directly engaged in agriculture (the majority working in crop enterprises).

  • Represents approximately $47.5\%$ of total national employment.

• Economic and Financial Contributions:

  • Foreign Exchange: Currency earned through exporting raw or processed agricultural commodities (e.g., rice, jute, wheat, tomatoes, frozen fish, vegetables).

  • International Relations: Establishing bilateral trade through exports and imports of agricultural goods.

  • Government Revenue: Derived from land rents and taxes on agricultural land and products.

  • GDP Share (Bangladesh Example): Agriculture contributes around $19.29\%$ of total GDP, with crop plants alone contributing $13.44\%$.

• Environmental and Aesthetic Roles:

  • Aesthetic Value: Flowers (e.g., roses, jasmine) and ornamental plants/grasses enhance natural beauty.

  • Ecological Balance: Plants liberate $O_2$ while animals liberate $CO_2$, maintaining atmospheric gas balance.

Philippine Agricultural Sector

• Socioeconomic Status:

  • The Philippines is primarily an agricultural country.

  • The majority of citizens live in rural areas and support themselves through agricultural activities.

• Four Sub-Sectors:

  1. Farming

  2. Fisheries

  3. Livestock

  4. Forestry

• Crop Classification in the Philippines:

  • Primary Agricultural Crops: Rice, corn, coconut, sugarcane, banana, pineapple, coffee, mangoes, tobacco, and abaca.

  • Secondary Agricultural Crops: Peanut, cassava, camote, onion, cabbage, eggplant, calamansi, garlic, rubber, and cotton.

• International Trade Profile:

  • Export Destinations: United States of America (USA), Japan, Europe, and ASEAN countries.

  • Major Export Commodities: Coconut oil and derivative products, fruits, vegetables, bananas, and prawns.

  • Major Import Commodities: Unmilled wheat and meslin, oilcake and other soybean residues, malt and malt flour, urea, flour, meals and pellets of fish, soybeans, and whey.

• Major Concerns and Challenges in Philippine Agriculture:

  • Rampant conversion of prime agricultural land for commercial uses.

  • Farmers' continued heavy reliance on chemical-based fertilizers and synthetic pesticides.

  • Severe environmental degradation (including water pollution, destruction of coral reefs, and deforestation).

  • Critical lack of government and institutional funding for vital infrastructure projects, such as irrigation systems.