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General Topics on Grazing Management
part of test 3
38
Agriculture
Undergraduate 4
04/24/2017

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Cards

Term
how does forage grow?
Definition
-early vegetative lag
-late vegetative linear
-reproductive lag
Term
LAI of grasses
Definition
7-10
Term
LAI of legumes
Definition
3-4
Term
difference between legumes and grasses in terms of how they interact with the sun
Definition
legumes follow sun, but grasses don't
Term
when to graze a forage
Definition
when there's max amount of green material
Term
growth rate vs. digestibility
Definition
something that grows fast is more digestible
Term
manage grazing such that the forage...
Definition
stays in the linear phase
Term
what happens to the forage if you graze it too long?
Definition
you get it in the lag phase, which is not maximum growth rate
Term
animal productivity is primarily a function of...
Definition
feed intake

get as much into the animal as possible
Term
1 animal unit
Definition
1,000 lbs b.w.
Term
how much animals eat per day compared to body weight
Definition
often 2% their body weight per day
Term
stocking rate
Definition
animal units per acre over all acres and a period of time
Term
ideal stocking rate
Definition
1 AU/2 acres
Term
stocking density
Definition
animals per acre at any one point in time
Term
ideal stocking density
Definition
15 AU/1 acre
Term
stocking rate is a function of...
Definition
body weight per acre
Term
why it's possible to cograze animals
Definition
because certain types of animals graze different areas
Term
silvopasture
Definition
pasture w/ trees thin enough such that there's grass growing between the trees
Term
the unit of production for a grazing based system
Definition
profit per acre
Term
how you should optimize animal productivity
Definition
on a per acre basis
Term
the primary calculations for forage management
Definition
-available acres
-paddock size
-number of paddocks
Term
how to calculate available acres
Definition
available acres = (paddock size) x (# of paddocks)
Term
how to calculate paddock size
Definition
paddock size = (animal weight x %DMI x Head x Days in paddock) / (available foragediff x grazing efficiency %)
Term
how to calculate number of paddocks
Definition
(days of rest) / (days in paddock) + 1
Term
why you don't want your animals drinking water that has algae
Definition
animals are in danger when they drink the algae scum along with water
Term
cattle have greater average daily gain (ADG) when watered from pond or trough?
Definition
trough
Term
some reasons to avoid pond or creek water when managing cattle
Definition
-cattle will drink more from clean sources than from impaired sources
-toxins and pathogens
-ability to manipulate grazing and camping behavior
-improved animal performance
Term
how a frost free though works
Definition
cattle push ball down, drink water, and ball comes back up
Term
some types of troughs that can be used with cattle
Definition
-frost-free trough
-concrete trough
-plastic trough
-tire tank
-temporary water
-portable tire tank
-nose troughs
Term
nose trough
Definition
animal sticks its nose in small trough that's on a center pivot irrigator

animal gets water from separate supply
Term
the type of heat stress we usually have on our cattle in GA
Definition
we usually straddle the line between mild and medium stress
Term
the best shade for cattle
Definition
natural shade
Term
some details about trees providing shade for cattle
Definition
-evaporative cooling under live trees increases temp differential
-potentially damaging to tree
-adequate shade for the number of animals
Term
some details about providing artificial shade for cattle
Definition
-shade cloth is cheap, effective, lightweight, and easy to handle, but prone to wind/weather damage
-avoid having top too close to the ground
-angle roof or shade 15 degrees to max the throw of the shadow
-N:S orientation
Term
consequences of shade
Definition
-shading of pasture underneath
-damage to trees
-nutrient accumulation under trees
-soil compaction and/or mud
+consider geotextile material and gravel to protect it as a high use area
Term
the root dieback that happens to grass is especially true for...
Definition
the fine roots
Term
impact of defoliation on root growth
Definition
reduces root growth
Term
why you might want the height at the end of grazing to be higher
Definition
to optimize the intake of quality forage for vigorous regrowth
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