ble 6. Annual production and greenh

ble 6. Annual production and greenhouse gas emissions for a simulated representative dairy farm
in central Pennsylvania and the effect of adding three strategies for reducing N2O emissions.
Base
Farm[a]
With More Efficient
Use of Nitrogen
Fertilizer[b]
Plus Use of
Mulch Cover Crop
on Corn Land[c]
Plus Use of
Top‐Loaded
Manure Storage[d]
Plus Change to
a Loam Soil[e]
Feed production and use (Mg DM)
Harvested forage 523 522 521 522 516
Harvested grain 163 161 161 158 194
Purchased feed 199 201 202 204 172
Total herd feed use 885 884 884 884 882
Greenhouse gas emissions (kg)
Nitrous oxide 681 642 421 213 84
Manure storage 197 197 197 0 0
Crop production 485 445 224 213 84
Methane 21,192 21,193 21,189 23,947 24,007
Carbon dioxide 146,541 150,466 154,576 149,681 104,092
Net farm emission (CO2e)[f] 879,279 871,607 809,759 811,830 729,299