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GRASSLAND PRODUCTION FOR DAIRYING IN NEW ZEALAND *
Author(s) -
Owens E. M.
Publication year - 1957
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.1365-2494.1957.tb00966.x
Subject(s) - grassland , environmental science , pulp and paper industry , hammer , crop , materials science , agronomy , biology , metallurgy , engineering
Comparison of results obtained on herbage samples freeze‐dried and hot‐air‐dried during tests of commercial green‐crop driers indicated apparent losses of crude protein and β‐carotene in freeze‐drying. Experiments on laboratory technique in drying, milling and analysing herbage samples showed a differential loss in conventional laboratory hammer mills biassed towards loss of high‐protein particles. The differential loss was particularly marked for freeze‐dried material, but was also shown to be significant for oven‐dried material. There is a need for development of a laboratory mill to disintegrate samples without loss of milled material and without undue temperature rise when used for milling samples at the same rate as existing laboratory hammer mills.