nitrogen env Flashcards
define eutrophication
change in waterbodies due to enrichment with inorganic plant nutrients
what does BOD stand for
biochemical oxygen demand
define biochemical oxygen demand (BOD)
measure of oxygen consumption of a water sample for organic matter breakdown
define non-point source pollution
coming from many dispersed sources that are difficult to identify or regulate
define catchment area
area from which a river or lake derives its water
what would the BOD be of clean water (ml O L)
1-2
what are the 4 components of spatial scales
field, farm, catchment, river basin
what are the N inputs in kg/ha in the Irish grassland system
245kg ha
what is the N exit in products (kg/ha) in the Irish grassland system
79 kg ha
what is the average N use efficiency % range in the Irish grassland system
29 - 37%
what does GBP stand for
global P balance
what does PUE stand for
P use efficiency
what is the greatest cause of phosphorus losses
surface runoff
what is the minimum soiled water storage in days for milk producers
31 days
what storage capacity is required for those in zone A
16 weeks
what storage capacity is required for those in zone B
18 weeks
what storage is required for those in zone C
20 - 22 weeks
what storage capacity is required for pigs and poultry
26 weeks
how much organic N does a cow under 4,500kg of milk produce
80 kg N
12 P/ha
how much N does a cow between 4,500 and 6,500kg milk produce
92kgN/ha
13.6 P/ha
how much N does a cow over 6,500 kg milk produce
106kgN/ha
15.8 P/ha
what is the stocking rate of commonage under the new rules
50kg organic N
what must the crude protein be on concentrates for grazing livestock between 15th April and 30th of September
15%
how far away must water troughs or drinking points be located from nearest water course
20 metres
how often must derogation farmers complete a soil analysis
every 4 years
by what date must 50% of slurry be spread on derogation farms
15th June
over what kgN of a stocking rate must farmers apply slurry using LESS
150kgN
how often is the nitrates action programme reviewed
every 4 years
in what area is the highest amount of none compliances detected
the inadequate collection of livestock manure, other organic fert, soiled water or effluent.
makes up 38%
what number must the (faecal coliforms) be under in order the classify as the pasteurised product
under 1000
what must the soil pH be under in order to be classed as a suitable soil for sludge spreading
5.0
what % can the clay content not exceed in order to be classed as a suitable soil for sludge spreading
10%
the be class as suitable soil for sludge spreading soil must have low levels of heavy metals
how long are sludge producers constraint from harvesting animal fodder on land used for sludge
3 - 6 weeks
from what months does the sludge producer need storage for the sludge
from October to February
what are the permitted crops for the spreading of sludge
cereals, oil seed rape, grass, forestry
what are bottle fed babies at risk of due to nitrogen in the water
methemoglobinemia ( blue baby syndrome)
what must the level of nirate be under in drinking water (mg L)
50mg L
what % of N in animal manures is lost to the air
15%
what % of irelands total greenhouse gases are as a result of agriculture
38%
what is the technical abatement potential of the MACC
15 million T
what 2 abatements have the greatest potential in the MACC
protected urea
LESS
with baseline scenario in the MACC by what % will the NH3 emissions increase by
9%
