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Ag Sci animal N > nitrogen env > Flashcards

nitrogen env Flashcards

1
Q

define eutrophication

A

change in waterbodies due to enrichment with inorganic plant nutrients

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2
Q

what does BOD stand for

A

biochemical oxygen demand

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3
Q

define biochemical oxygen demand (BOD)

A

measure of oxygen consumption of a water sample for organic matter breakdown

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4
Q

define non-point source pollution

A

coming from many dispersed sources that are difficult to identify or regulate

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5
Q

define catchment area

A

area from which a river or lake derives its water

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6
Q

what would the BOD be of clean water (ml O L)

A

1-2

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7
Q

what are the 4 components of spatial scales

A

field, farm, catchment, river basin

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8
Q

what are the N inputs in kg/ha in the Irish grassland system

A

245kg ha

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9
Q

what is the N exit in products (kg/ha) in the Irish grassland system

A

79 kg ha

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10
Q

what is the average N use efficiency % range in the Irish grassland system

A

29 - 37%

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11
Q

what does GBP stand for

A

global P balance

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12
Q

what does PUE stand for

A

P use efficiency

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13
Q

what is the greatest cause of phosphorus losses

A

surface runoff

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14
Q

what is the minimum soiled water storage in days for milk producers

A

31 days

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15
Q

what storage capacity is required for those in zone A

A

16 weeks

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16
Q

what storage capacity is required for those in zone B

A

18 weeks

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17
Q

what storage is required for those in zone C

A

20 - 22 weeks

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18
Q

what storage capacity is required for pigs and poultry

A

26 weeks

19
Q

how much organic N does a cow under 4,500kg of milk produce

A

80 kg N
12 P/ha

20
Q

how much N does a cow between 4,500 and 6,500kg milk produce

A

92kgN/ha
13.6 P/ha

21
Q

how much N does a cow over 6,500 kg milk produce

A

106kgN/ha
15.8 P/ha

22
Q

what is the stocking rate of commonage under the new rules

A

50kg organic N

23
Q

what must the crude protein be on concentrates for grazing livestock between 15th April and 30th of September

A

15%

24
Q

how far away must water troughs or drinking points be located from nearest water course

A

20 metres

25
Q

how often must derogation farmers complete a soil analysis

A

every 4 years

26
Q

by what date must 50% of slurry be spread on derogation farms

A

15th June

27
Q

over what kgN of a stocking rate must farmers apply slurry using LESS

A

150kgN

28
Q

how often is the nitrates action programme reviewed

A

every 4 years

29
Q

in what area is the highest amount of none compliances detected

A

the inadequate collection of livestock manure, other organic fert, soiled water or effluent.
makes up 38%

30
Q

what number must the (faecal coliforms) be under in order the classify as the pasteurised product

A

under 1000

31
Q

what must the soil pH be under in order to be classed as a suitable soil for sludge spreading

A

5.0

32
Q

what % can the clay content not exceed in order to be classed as a suitable soil for sludge spreading

A

10%

33
Q

the be class as suitable soil for sludge spreading soil must have low levels of heavy metals

A
34
Q

how long are sludge producers constraint from harvesting animal fodder on land used for sludge

A

3 - 6 weeks

35
Q

from what months does the sludge producer need storage for the sludge

A

from October to February

36
Q

what are the permitted crops for the spreading of sludge

A

cereals, oil seed rape, grass, forestry

37
Q

what are bottle fed babies at risk of due to nitrogen in the water

A

methemoglobinemia ( blue baby syndrome)

38
Q

what must the level of nirate be under in drinking water (mg L)

A

50mg L

39
Q

what % of N in animal manures is lost to the air

A

15%

40
Q

what % of irelands total greenhouse gases are as a result of agriculture

A

38%

41
Q

what is the technical abatement potential of the MACC

A

15 million T

42
Q

what 2 abatements have the greatest potential in the MACC

A

protected urea
LESS

43
Q

with baseline scenario in the MACC by what % will the NH3 emissions increase by

A

9%

44
Q
A

Ag Sci animal N (11 decks)

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