Plsc 101 Week One Notes
Plsc 101 Week One Notes plsc 101
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This 3 page Class Notes was uploaded by randomchic12 on Tuesday March 15, 2016. The Class Notes belongs to plsc 101 at Louisiana Tech University taught by Dr. Paul Jackson in Spring 2016. Since its upload, it has received 39 views. For similar materials see plant science in Botany at Louisiana Tech University.
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Date Created: 03/15/16
1 Plsc 101 Week One Notes Intro to Crop Production Origin of Agriculture Crop Production began around 9,000 years ago framework older than civilization and remains similar today plants were domesticated Primitive Methods people gathered and preserved seeds prepared land destroyed unwanted vegetation/weeds stirred soil to prepare a seedbed planted when the season and weather was right based on past experience removed insects by hand mystic rites to ward off plant diseases gathered, processed, and stored the food products early farmers grew limited number of crops ex: wheat, barley, rye (cereals) same crop grown continuously on same plot of land results= low yields and exhaustion of soils still practiced in less developed countries first plant domestication occurred in Thailand in Neolithic times (later Stone Age 9500 BC) Progressive History working with crude tools and hand labor iron hand knives for cultivating “clam shell hoes” for weeding animals for tilling 2 manures and ashes old art of crop production predominates today, but we have come of age. pesticides to control insects, diseases, and weeds inorganic fertilizers better crop rotations new varieties of crops (improved genetics) Crop Science Branches of Plant Agriculture agronomy principles and practices of crop production and field management derivation (Greek)= agros (field) & nomos (to manage) horticulture propagation of garden plants such as fruits, vegetables, flowers, ornamentals, woody trees & shrubs derivation (Latin)= hortus (garden) & cultura (cultivation) How did we learn new methods? improved crop production using controlled research trials research findings revealed: plantings areas, dates & techniques cultural practices (practice developed over time and accepted as a routine practice given a certain setting) crop production ideas were exchanged via: cultural societies scholarly articles and magazines rural papers Populations Malthusian Theory Thomas Malthus (1798) sufficient food would be a problem with populations that increase over time with limited land area available. 3 things 2 remember: sufficient food, ……? theory is false in developed countries modern technology 3 increased production and food supply Food Production ways to increase food production? growing improved crop varieties and hybrids (genetics) improved fertilizer use, irrigation, drainage, pesticides, mechanical technology (tractors, etc.), crop rotations, and cultural practices we are in a fixed land economy
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