Malthusian Theorem - a population projection that suggests the population will exceed
the available food supply because populations grow at geometric rates while food
supplies grow at arithmetic rates
How has food production kept up? - -Breeding
-GMO's
-Pesticides
-Mechanization
-Education of farmers
What are some future production concerns? - -Loss of arable land
-Deforestation
-Inadequate supply of fertilizer
-Low margin of return from farmer
What is agriculture? - Cultivation of animals, plants, fungi, and other life forms for food,
fiber, biofuel, and other products used to sustain/improve life
What is science, what is art? - Science is what is known, art is how we react to the
unknown.
Uncontrollable in an ecosystem: - -Solar
-Temperature
-CO2
-Precipitation
-Atmospheric Environment
Controllable in an ecosystem: - -Crop Planted
-Soil Environment (nutrients, water, fertilizer)
What is ecology? - The relationship of living things to their environment and to each
other
, What is agroecology? - The study of specific relationships of crops and farm animals to
the environment and to each other
What is an agroecosystem? - The total interaction between crops, animals, and their
environment within a farming & ranching operation
What do management decisions affect? - All organisms in the ecosystem & the non
living portion of the system (fertilizer, tillage, irrigation, pesticides, animal stocking rates)
What does biotic mean? - living
What are some things that biotic things fight for? - The same resource (that is abiotic)
-Light
-Water
-Nutrients
-Space
What is a symbiotic relationship? - A relationship where both organisms benefit
What are some abiotic factors? - -Water
-Soil
-Sunlight
-Air
-Temperature
-Mineral Nutrients
-Organic Matter
An agroecosystem is managed by _______________________ in a way that
maximizes _____________________ or ______________________. - -A producer
(farmer)
-Production
-Profit
What is an open system? - Nutrients that are moved w/ commodity & must be replaced
What is a natural system? - Little influence by man, natural fluctuations.
What is a closed system? - A continuous cycle of life or death
Examples of Food Crops - -Fruit
-Vegetables
-Grain
-Oil
Examples of Forage Crops - -Hay
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