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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104649
Title Een onderzoek naar het voorkomen en de oorzaken van de verschijnselen, welke worden aangeduid met den naam "ontginningsziekte"
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door Wicher Siebe Smith
Title-variation: Ontginningsziekte
Author(s) Smith, W.S.
Publisher Wageningen : Veenman
Publication year 1927
Description 149 p
Notes Rugtitel : Ontginningsziekte  show all notes
Proefschrift Wageningen
Tutors Aberson, Prof. Dr. J.H.
Graduation date 1927-05-31
Dissertation no. 32
Author abstract show abstract
11 apparently diseased soils gave the same general symptoms of 'reclamation disease' with oats and peas in pot experiments. The number of microbes was smaller and the proportion fungi/microbes was always larger in diseased soils than in similar normal soils. As soil sterilisation brought no cure, the disease could not be ascribed to microbes. The widespread opinion that the disease occurred on a certain black peat (Du. Gliede) was confirmed by pot experiments, also if Gliede was mixed with sand.

Two groups of organic substances could be separated by hot ethanolic extraction, one coming out of solution after cooling, the other remaining in solution. From the solution a crystalline substance could be obtained, afterwards called 'Gliedine', causing disease symptoms after application to peas and oats. At minute concentrations it stimulated growth of oats. The residue caused grey speck disease in oats.

Fertilizer trials with differently diseased soils showed that only compost or CuSO4 could restore the soil (also in the 2nd year).

As 'Gliedine' slowly evaporated at 100 'C diseased soils were heated 3 h per day for 3 days, resulting in restoration of slightly diseased soils, almost cure of moderately diseased soils, and delay of disease symptoms on very diseased soils.

The curing effect Of CUS04 must very probably be ascribed to the formation of an insoluble compound with 'Gliedine'

Online full textINTERNET
On paper FORUM ; SPEC.COLL. ; A2096,1927,07
FORUM ; STACKS ; NN08202,32 ; Not for loan
Keyword(s) (cab) nutrient deficiencies / chlorosis / plant nutrition / nutrients
Categories Plant Disorders and Nutrient Deficiencies
Publication type PhD thesis
Language Dutch; Flemish
About cum laude graduation (with distinction)
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