LOCALIZING THE NITROGEN IMPRINT OF THE PARIS FOOD SUPPLY: THE POTENTIAL OF ORGANIC FARMING AND CHANGES IN HUMAN DIET - Organic Agricultural Practices - page 74

TABLE 1: Cont.

2006 Org-Loc OrgLocDem

Agriculture
permanent meadows
area

1000 ha 800 Agreste (2007) 800 800 same as current situation

yield kgNha −1 yr −1 118 Agreste (2007) 118 118 same as current situation

production ktonNyr −1

95 Agreste (2007) 95 95 area×yield

use as feed % 100 100 100

N 2 fixing crops + temporary meadows
area

1000 ha 334 Agreste (2007) 2000 1150 adjusted to meet livestock require-

ments

yield kgNha −1 yr −1 171 production/area 150 150 conservative estimate

production ktonNyr −1 57 Agreste (2007) 300 173 area×yield

N 2 fixation ktonNyr −1 80 1.4×production (aeri-

al + root contrib.)

420 242 1.4×production (aerial + root contri-

bution)

use as feed % 25 Agreste (2007) 70 70 conservative estimate, remaining part

used as green manure

non fixing crops
area

1000 ha 3985 Agreste (2007) 2319 3169 agricultural area - (N 2 fixing crops +

temporary and permanent meadows)

average yield kgNha −1 yr −1 131 production/area 144 100 calculated from total fertilization,

using relationship of Fig. 2

production ktonNyr −1

523 Agreste (2007) 334 317 yield×area