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43 Cards in this Set
- Front
- Back
when induced to flower apical meristems produce a number of _____ ___-
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floral/ leaf primorida
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induction can occur during the final stages of growth of ____ ___
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annual crops
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induction can occur during the end of growing season for____
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perenialls
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florigen is a ____ stimulus
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flowering
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what two adaptive responses allow seedlings to optimize photosynthetic light capture
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phototropisms and shade avoidance.
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three photorecpetors are
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photochrome
crytochrom/phototropisms uv receptors. |
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photoreceptors are controlled by
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light intenisty, quality and perdoicty.
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Acid solutions have _ as a dominate particle. Base solutions have __ as a dominate component
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Hydrogens, Hydroxides.
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acid soils can inhibit what type of bacteria
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nitrogen fixing
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horizion A is known as
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zone of biological activity
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horizon B is known as
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rooting zone
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Horizon C is known as
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zone of transtion.
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steps in tillage
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plowing
deep tillage land leveleing mnimum tillage soil fumigation disking harrowing listing cultivation harvets |
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land preperation is
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maintatin seedbend
crop residues, control weeds improrve physical conditions control erosion level the land. |
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physciall turning the soil does what
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reduces soil born diseases
control weeds and insects cause soil compaction |
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minium tillage does what
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reduces compaction
soil imporves disease can be a problem |
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contour plowing does what
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reduce erosion
with irrigation land must be leveled. |
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soil chemistry is comprised of what three things
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soil pH
CEC and Water holding capacity. |
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plants wilt becuase of what occurance
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they lose turgor, pressure that makes the plant rigid
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main causes of soil infertility
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erosion
desertifcaition salination urbanization. |
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factors that create erosion
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water, wind human activities
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salinization is caused by
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high levels of salt
over cultivation climate favor salt accumulation. |
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the greatest loss of agricultural land is due to waht
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urbanization
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three common names for temperatures
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kelvin, celius and ferhinheitht
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water loss, cell wall softening, and loss of semi peremabiilty has a massive effect on what
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turgor pressures.
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95 percent of the plants dry weight can described as
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hydrated carbon in the form of carbohydrates like polymrs of glucose
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nitrgoen is most abudent in what form
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gas
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Nitrgoen lacking plants are what color
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yellow
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78% of N gass is in the atmosphere, but the rest needs to be ____ to unstable ammonia to be taken up by crops
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converted
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what is the basic building block of commmon nitrogen fertilization
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ammonina
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nitrogen can be lost from the soil by what process
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denitrogenfication.
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harbor bosh porcess
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nitrogen is commerical fixed into ammonia by energy
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potassium is used for what
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photosyntheisis, sugar translation and enyzme activation. Transport.
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calcium is important in ____ and ____ within in the cytoplasm of the cell.
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connection and signaling
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phosphorous and magnesium
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needed in ATP and Nadp energy structures.
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Sulfur can be applied to crops as what
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a fungcide
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Abiotice envirometnal factors depend on what five factors
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temperature, moisture, solar radiation, freezing, atmosphere
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as air rises up it expands and cools down becuase its _____ _____ volume is increasing.
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surface area
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adiabatic cooling is when air gets _____ and rain is created
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cooler
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Rain shadows form on what side of the mountains
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leeward
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wounding can cause what physiolgocial effect
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ethylene prodcution
stipulated respriation phenolic metabolism wound healing |
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wound enhanses repriation occurs becuase of the increase in what two things
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CO2 and enzymatic activity
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what plant is an example of a chill sensitive plant
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corn
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