《Germany》.docVIP

Germany EST_HOR (Estimated horizon database) PROF_NUM (Profile number): The profile numbers are corrected (see EST_PROF). HOR_NUM: ok, except for profile DE11 One of the horizons has an incorrect value of “DEPTHSTART” and “DEPTHEND”. This is horizon number 2 or the 2C-horizon. The “depthstart” value should have been “75”, so that the 2C-horizon is beneath the 2Bw-horizon. The horizons 2 (2C) is therefore altered to horizon 4 (see table below). PROF_NUM HOR_NUM HOR_NAME DEPTHSTART DEPTHEND DE11 (642) 1 Ap 0 20 DE11 (642) 2 2C 0 75 DE11 (642) 3 Bw 20 45 DE11 (642) 4 2Bw 45 75 After correction: The horizon numbers of all the 3 lower horizons are altered. PROF_NUM HOR_NUM HOR_NAME DEPTHSTART DEPTHEND DE11 (642) 1 Ap 0 20 DE11 (642) 2 Bw 20 45 DE11 (642) 3 2Bw 45 75 DE11 (642) 4 2C 75 -999 HOR_NAME: A few corrections are made in the designation of horizons and suffixes so that the name of the horizons generally follows the FAO nomenclature (see spreadsheet). E.g. “Bsh” is altered to “Bhs” or two different C-horizons are numbered “C1” and “C2” instead of just “C” and “C”. For a rather large part of the data spacings between the master horizon letter and the numbers were deleted (e.g. C 2 becomes C2) DEPTHSTART: see above Origin of data: Average of a number of profiles: DEPTHEND: see above Origin of data: Average of a number of profiles: AR_NA: No data, excpet for profile DE27 DE34 that have the value “2”. The values should be “-4” if the value is less than 4 (humid areas). The following formula can be used to calculate the data: BD (Bulk density): Origin of data: Average of a number of profiles: Almost all horizons have data except for some C-horizons. The chart below shows the relation between bulk density and organic matter. Theoretically the bulk density should decrease with increasing amount of organic matter. Result: The data seem reliable except for a few horizons rich in organic matter that show high bulk densities at high contents o