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Plant hormones (also known as phytohormones) are chemicals that regulate plant growth, which, in the UK, are termed ‘plant growth substances’. Plant hormones are signal molecules produced within the plant, and occur in extremely low concentrations. Hormones regulate cellular processes in targeted cells locally and when moved to other locations, in other locations of the plant. Hormones also determine the formation of flowers, stems, leaves, the shedding of leaves, and the development and ripening of fruit. Plants, unlike animals, lack glands that produce and secrete hormones, instead each cell is capable of producing hormones. Plant hormones shape the plant, affecting seed growth, time of flowering, the sex of flowers, senescence of leaves and fruits. They affect which tissues grow upward and which grow downward, leaf formation and stem growth, fruit development and ripening, plant longevity, and even plant death. Hormones are vital to plant growth and lacking them, plants would be mostly a mass of undifferentiated cells.

An agronomist (called an agrologist in Canada) is a scientist who specializes in agronomy, which is the science of utilizing plants for food, fuel, feed, and fiber. The agronomist is an expert in agricultural and allied sciences, except veterinary sciences.

Norman E. Borlaug

Norman E. Borlaug led the introduction of semi-dwarf high-yield, disease-resistant wheat varieties and modern agricultural production techniques to Mexico, Pakistan, and India. As a result, Mexico became a net exporter of wheat by 1963. Between 1965 and 1970, wheat yields nearly doubled in Pakistan and India, greatly improving the food security in those nations. These collective increases in yield have been labeled the Green Revolution, and Borlaug is often credited with saving over a billion people from starvation.[1] He was awarded the Nobel Peace Prize in 1970 in recognition of his contributions to world peace through increasing food supply. In 1986, he established the World Food Prize to recognize individuals who have improved the quality, quantity or availability of food around the globe.
[edit] Edward L. Murphy II

Edward L. Murphy II was credited with the first retrifution of Bermuda and bahia hybrid. Murphy’s hydrid indoctrination breeding and selection criteria of seeds is currently used on many PGA sanctioned courses.[citation needed]
[edit] Perry G. Holden

Perry G. Holden was the first professor of agronomy in the United States[2]. Through his various outreach programs to promote the use of hybrid corn seeds he became known as the “corn evangelist”.[3] While at Iowa State University, Perry Holden developed important plant breeding techniques. These plant breeding techniques resulting in amazing yield increases that improved the quality of life for farmers while lowering the cost of food.

In agriculture, the harvest is the processes of gathering mature crops from the fields. Reaping is the cutting of grain or pulse for harvest, typically using a scythe, sickle, or reaper.[1] The harvest marks the end of the growing season, or the growing cycle for a particular crop, and this is the focus of seasonal celebrations of many religions. On smaller farms with minimal mechanization, harvesting is the most labor-intensive activity of the growing season. On large, mechanized farms, harvesting utilizes the most expensive and sophisticated farm machinery, like the combine harvester. Harvesting in general usage includes an immediate post-harvest handling, all of the actions taken immediately after removing the crop—cooling, sorting, cleaning, packing—up to the point of further on-farm processing, or shipping to the wholesale or consumer market.

Among the major field crops, oats, wheat, and rye are sowed, grasses and legumes are seeded, and maize and soybeans are planted. In planting, wider rows (generally 75 cm (30 in) or more) are used, and the intent is to have precise, even spacing between individual seeds in the row; various mechanisms have been devised to count out individual seeds at exact intervals.Difference between sowing and planting must not be forgotten.
Regular rows of maize in a field in Indiana.
[edit] Sowing depth

In seeding, little if any soil is placed over the seeds. More precisely, seeds can be generally sown into the soil by maintaining a planting depth of about 2-3 times the size of the seed.
[edit] Sowing types and patterns

For hand sowing, several sowing types exist; these include [7]:

* Flat sowing
* Ridge sowing
* Wide bed sowing

Several patterns for sowing may be used together with these types; these include:

* Regular rows
* Rows that are indented at the even rows (so that the seeds are placed in a crossed pattern). This method is much better, as more light may fall on the seedlings as they come out.