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Table 20 
Chemical composition of plant material collected at Prudhoe Bay, 12-25 June 1972. 
Components were analyzed according to the detergent technique of Goering and 
Van Soest (1970). Values are expressed as g (100 g)! dry matter. 
In vitro 
ADF CC wc dry matter 
ligno-cellulose cell Hemi- digestibility 
Sample NDF or crude fiber contents cellulose Cellulose Lignin (%) 
Shrubs 
Salix arctica 
S. pulchra 
S. ovalifolia 
S. lanata 
Dryas integrifolia 
leaves/stem base 
inflorescences — 
Sedges 
Carex aquatilis 
Eriophorum angustifolium 
live leaves/10% dead 
inflorescence + stem 
Grasses 
Dupontia fisheri 
live leaves/10% inflorescences 
inflorescences + stem 
Arctophila fulva 
Herbs 
Artemisia richardsonii sp. 
Pedicularis sp. 
Saxifraga oppositifolia 
Lichens 
Cetraria cucullata 
Cladonia alpestris (Coal Creek) 
C. alpestris (Nome) 
Esophageal fistula egesta 
Mixed samples EF C1 
C2 
3} 
C4 
Artificial food 
Mixed reindeer hay * 
Purina cattle starter No. 1 
NDF, neutral detergent fiber; ADF, acid detergent fiber; CC, cell contents; CWC, cell wall 
constituents; lignin was determined as the mineral acid resistant component of ADF. 
/n vitro digestibilities were taken from Table 16. 
*78% lichen, balance of Carex aquatilis and brome hay. 
Cell Constituents = 100 — NDF ; 
Hemicellulose = NDF — ADF 
Cellulose = ADF — lignin 
