SCSC 444 EXAM 1 QUESTIONS AND CORRECT ANSWERS ALREADY PASSED
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SCSC 444
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SCSC 444
SCSC 444 EXAM 1 QUESTIONS AND CORRECT ANSWERS ALREADY PASSED
Why use forage legumes? - Answer- reduction/elimination of inorganic N fertilizer (fixes nitrogen)
Reduction in winter feeding costs
(lots of nutrition in the winter)
improved animal performance
(lots of nutrition in the winter)
l...
SCSC 444 EXAM 1 QUESTIONS AND
CORRECT ANSWERS ALREADY
PASSED
Why use forage legumes? - Answer- reduction/elimination of inorganic N fertilizer (fixes
nitrogen)
Reduction in winter feeding costs
(lots of nutrition in the winter)
improved animal performance
(lots of nutrition in the winter)
lengthened grazing season
improved soil tilth
(improve soil health)
wildlife programs
(clover is used in deer hunting)
weed suppression/reduced herbicide
Forage legumes as nitrogen sources for pastures - Answer- nitrogen is the first limiting
nutrient for forage production
forage legumes fix atmospheric nitrogen through a symbiotic relationship with
Rhizobium bacteria
nodules form on the legume roots when this system is working
nodules are small
nitrogen fixation is regulated based on need. if the soil has a high N amount, it will
reduce nodulation.
don't apply any N when planting then apply reduced rates of N in early winter
Inoculation of Legume Seed - Answer- Legume must be inoculated with the correct
Rhizobium species
most clover see is pre-inoculated
Rhizobium are natural soil bacteria and occur in all soil types
Planting pre-inoculated seed establishes the correct Rhizobium strain
Factor affecting Rhizobium N-Fixation - Answer- low soil pH
low soil nutrient status
high temps
low/high soil moisture
wrong inoculant
improper inoculation
improper treatment of rhizobium
Devine Little Burr Medic - Answer- Blacklands ecoregion
soil type: clay loam
soil pH: 6-8
Limited production
USe: overseeding pastures 3-5 lb/A
Berseem Clover - Answer- Soil type: loam, clay loam
Soil pH: 6-8
Low bloat potential
tolerates flooding and wet soils
low drought tolerance
lacks reseeding potential
low cold tolerance
best use south of I-20
White clover - Answer- bottomland sites
generally a reseeding annual in east Texas
late spring forage production
Blackhawk or Apache arrowleaf clover - Answer- Soil type: sandy loam
soil pH: 6-7
virus tolerant cultivar
blackhawk has fungal and virus tolerance
most productive and latest maturing of the clovers
seeding rate: 8-10 lbs/acre
low bloat potential
Crimson Clover - Answer- best combo of cold tolerance and early spring forage in east
texas
can be managed for reseeding
flower in mid-April and allow early grass production
Rose Clover - Answer- high hard seed percentage
planting rate can be reduced from 16 to 8 lb/ac for more economical establishment
early spring forage production but not as good as Crimson
reliable reseeding on upland sites
not adapted to wet, poorly drained sites
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