Horizons - layers of soil that make up the soil profile
Biological yield - the amount of dry matter produced per unit area
economic yield - The amount of the part of the plant of usable marketable value is called
the
biomass - the quantity of live organic matter in a given area at a given point in time is
called the
Harvest index - the portion of the crop that is of economic importance
roots - plants uptake water through the
hydroponics - a technique of growing plants (without soil) in water containing dissolved
nutrients
sand - soil particles that are 0.02 to 2 mm are called
silt - soil particles that are 0.002 to 0.02 are called
soil - soil particles that are smaller than 0.002 are called
the standerd test weight for a bushel of soybeans is - 60lbs
prussic acid poisoning is a potential risk for livestock grazing on what forage crop -
sorghum stalks
which of the following are non parasitic plants - mustards
which method of pest management uses one organism to control the population of
another - biological pest management
which method of pest management use chemicals to control pest populations - chemical
pest management
which method of pest management uses physical means such as traps tillage heat
treatment ect to manage pest populations - mechanical pest management
which method of pest management uses crop rotations, mulching and or cultivar to
manage pest populations - cultural pest management
, stage of development of a plant when the plant reaches maximum dry weight is known
as - physiological maturity
when the product of interest is at peak qaulity and quantity and will provide maximum
yield is known as - harvest maturity
cropland left idle and free of weeds for a period of time to restore productivity through
accumulation of water or nutrients or both is known as a - fallow
what is agronomy - the study of crops and soil management
On a plant stem, what is the space between two nodes called? - internode
what is the name of the stalk of a leaf to the stem of a broad leaf plant - petiole
what category do the crops wheat, barley oats and rye belong to - small grains
To what plant family does wheat belong? - poaceae
To what plant family does canola belong - brassiceae
to what plant family does alfalfa belong - fabacea
to what plant family does peanut belong - fabacea
what is the scientific name for alfalfa - Medicago sativa
what is the scientific name for corn - Zea mays
what is the scientific name for soy beans - glycine max
what is the scientific name for peanuts - archis hypogea
what is the scientific name for cotton - Gossypium hirsutum
what is the scientific name for wheat - Triticum aestivum
Peanut production in the United States increased rapidly during the early 1900's when
the boll weevil caused serious damage to which crop? - cotton
what is a microscopic slender round worm that lives in the soil - nematoad
What is reached when a pest infestation reaches the point where the point where the
potential loss exceeds the cost of a chemical application? - economic threshold
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