Soil nitrogen changes in farming systems in the humid tropics (Record no. 49790)

MARC details
000 -LEADER
fixed length control field 01461nam a2200193Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625160136.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-15610
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
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245 10 - TITLE STATEMENT
Title Soil nitrogen changes in farming systems in the humid tropics
490 0# - SERIES STATEMENT
Volume/sequential designation Biological Nitrogen Fixation in Farming Systems of the tropics, p.27-42, 1977
520 3# - SUMMARY, ETC.
Summary, etc. The available information shows: (1)that rather large quantities of nitrogen are contained in fallow vegetation and underlying soil ant that upon clearing the fallow large amounts of nitrogen era mineralized; (2)That leaching processes are not such thata the nitrate is rapidly moved out of the soil and sub-soil; (3)that there is no good evidence for or against the proposition that the ordinary arable crops are shallow feeders and the fallow vegetation has deep root systems; since soil dry out in the dry season there are some plant covers which indicate more nitrate in sub-soils under arable than fallow conditions; and (4)no data were found which would negate the hypothesis that sub-soil nitrogen is an important component in the nitrogen cycle in the tropics
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element SUELOS - NITRÓGENO
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element PLANTAS - NITRÓGENO
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Bartjolomew, W.V.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1qQ4fU22rW05PZhZ0WmaFqz8UqFgcOyjD/view?usp=drivesdk">https://drive.google.com/file/d/1qQ4fU22rW05PZhZ0WmaFqz8UqFgcOyjD/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
Koha item type Documentos solicitados
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-15610 25.06.2025 25.06.2025 Documentos solicitados