Agricultural science is a broad multidisciplinary field of biology that encompasses the parts of exact, natural, economic and social sciences that are used in the practice and understanding of agriculture. Professionals of the agricultural science are called agricultural scientists or agriculturists.
A fertilizer or fertiliser is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments. Many sources of fertilizer exist, both natural and industrially produced. For most modern agricultural practices, fertilization focuses on three main macro nutrients: nitrogen (N), phosphorus (P), and potassium (K) with occasional addition of supplements like rock dust for micronutrients. Farmers apply these fertilizers in a variety of ways: through dry or pelletized or liquid application processes, using large agricultural equipment or hand-tool methods.
Boron deficiency is a common deficiency of the micronutrient boron in plants. It is the most widespread micronutrient deficiency around the world and causes large losses in crop production and crop quality. Boron deficiency affects vegetative and reproductive growth of plants, resulting in inhibition of cell expansion, death of meristem, and reduced fertility.
Agronomy is the science and technology of producing and using plants by agriculture for food, fuel, fiber, chemicals, recreation, or land conservation. Agronomy has come to include research of plant genetics, plant physiology, meteorology, and soil science. It is the application of a combination of sciences such as biology, chemistry, economics, ecology, earth science, and genetics. Professionals of agronomy are termed agronomists.
Norman Ernest Borlaug was an American agronomist who led initiatives worldwide that contributed to the extensive increases in agricultural production termed the Green Revolution. Borlaug was awarded multiple honors for his work, including the Nobel Peace Prize, the Presidential Medal of Freedom and the Congressional Gold Medal.
Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite. This is in accordance with Justus von Liebig’s law of the minimum. The total essential plant nutrients include seventeen different elements: carbon, oxygen and hydrogen which are absorbed from the air, whereas other nutrients including nitrogen are typically obtained from the soil.
Micronutrients are essential dietary elements required by organisms in varying quantities throughout life to orchestrate a range of physiological functions to maintain health. Micronutrient requirements differ between organisms; for example, humans and other animals require numerous vitamins and dietary minerals, whereas plants require specific minerals. For human nutrition, micronutrient requirements are in amounts generally less than 100 milligrams per day, whereas macronutrients are required in gram quantities daily.
Harold F. Reetz Jr. was an American agronomist.
Zinc deficiency is defined either as insufficient zinc to meet the needs of the body, or as a serum zinc level below the normal range. However, since a decrease in the serum concentration is only detectable after long-term or severe depletion, serum zinc is not a reliable biomarker for zinc status. Common symptoms include increased rates of diarrhea. Zinc deficiency affects the skin and gastrointestinal tract; brain and central nervous system, immune, skeletal, and reproductive systems.
Micronutrient deficiency or dietary deficiency is not enough of one or more of the micronutrients required for optimal plant or animal health. In humans and other animals they include both vitamin deficiencies and mineral deficiencies, whereas in plants the term refers to deficiencies of essential trace minerals.
William Albert Albrecht chairman of the Department of Soils at the University of Missouri, was the foremost authority on the relation of soil fertility to human health and earned four degrees from the University of Illinois at Urbana–Champaign. As emeritus professor of soils at the University of Missouri, he saw a direct link between soil quality, food quality and human health. He drew direct connections between poor quality forage crops, and ill health in livestock and from this developed a formula for ideal ratios of cations in the soil, the Base Cation Saturation Ratio. While he did not discover cation exchange in the soil as is sometimes supposed, he may have been the first to associate it with colloidal clay particles. He served as 1939 President of the Soil Science Society of America.
Twenty years before the phrase 'environmental concern' crept into the national consciousness, he was lecturing from coast to coast on the broad topic of agricultural ecology.
" The soil is the ‘creative material’ of most of the basic needs of life. Creation starts with a handful of dust.” Dr. William A. Abrecht.
Volker Roemheld was a German agricultural scientist, plant physiologist and soil biologist at Hohenheim University.
The Indian Institute of Soil Science is an autonomous institute for higher learning, established under the umbrella of Indian Council of Agricultural Research (ICAR) by the Ministry of Agriculture, Government of India for advanced research in the field of soil sciences.
Surajit Kumar De Datta is an Indian American agronomist who is best known for his high yield variety of rice IR-8 that contributed significantly to the Green Revolution across Asia. He worked 27 years at the International Rice Research Institute in Philippines helping Southeast Asia get self-sufficiency in rice production. His book on rice production, Principles and Practices of Rice Production, is considered an authoritative opus in the field of rice cultivation. He has also written two books namely, "Availability of Phosphorus and Utilization of Phosphate Fertilizers in Some Great Soil Groups of Hawaii" in 1963 and "Availability of Phosphorus to Sugar Cane in Hawaii as Influenced by Various Phosphorus Fertilizers and Methods of Application" in 1965 with James C. Moomaw. For his works, he has been awarded the Norman Borlaug Award for Outstanding Contribution to Agricultural Sciences and a citation from the President of Philippines.
John Jacob Mortvedt was an American soil scientist who worked with micronutrient fertilizer.
Zinc deficiency occurs when plant growth is limited because the plant cannot take up sufficient quantities of this essential micronutrient from its growing medium. It is one of the most widespread micronutrient deficiencies in crops and pastures worldwide and causes large losses in crop production and crop quality.
Narinder Singh Randhawa (1927–1996) was an Indian agricultural scientist, writer and the director general of the Indian Council of Agricultural Research (ICAR). He was the president of the Indian Society of Soil Science during 1980–81 term and was a recipient of National Citizen Award and Rafi Ahmed Kidwai Award of the Indian Council of Agricultural Research. The Government of India awarded him the third highest civilian honour of the Padma Bhushan, in 1989, for his contributions to agricultural science.
Howarth E. "Howdy" Bouis, is an American economist whose work has focused on agriculture, nutrition outcomes, and reducing micronutrient malnutrition, also known as hidden hunger. He is the founder and former director of HarvestPlus, a global non-profit agricultural research program. Bouis was awarded the World Food Prize in 2016 for his pioneering work on biofortification.
Cynthia Grant, Ph.D., is a former Canadian federal scientist who is internationally recognized as an expert in soil fertility and crop nutrition. A researcher with Agriculture and Agri-Food Canada (AAFC) (1986-2015), she is highly respected by industry, farmers, and public agencies alike. Her research provided the scientific foundation for the Made-in-Canada 4R nutrient stewardship framework that applies crop nutrients from the right source and at the right rate, time and place. Grant is now part of an elite group of ten women who have been inducted into the Canadian Agricultural Hall of Fame since 1960.
Ewald Schnug is a German agricultural scientist, university lecturer and researcher specialised in Plant nutrition and Soil science.
