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ERRORS IN MEASURING NITROGEN AND DRY–MATTER CONTENT OF PLANT AND FAECES MATERIAL
Author(s) -
Sharkey M. J.
Publication year - 1970
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1970.tb01206.x
Subject(s) - lolium perenne , pasture , trifolium repens , dry matter , feces , nitrogen , zoology , agronomy , biology , dry weight , water content , chemistry , botany , poaceae , ecology , organic chemistry , geotechnical engineering , engineering
The N content of pasture species ( Trifolium repens L. and Lolium perenne L.) was much less affected hy drying temperatures over the range 70° to 100°C, and hy the density of packing of the pasture sample, than was the amount of hrown colour resulting from these treatments. The DM content of faeces was measured with equal accuracy at temperatures of 80° and 100°C and in samples which varied in weight over a four‐fold range. The N lost while drying faeces at 80°C was considerable, with large variations in the amount lost by different animal species fed on particular diets. The results confirm that analyses of the N content of faeces should be carried out before drying.