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Soil Fumigation Experiment, Spring Oats, Pastures, Residual effects 1936

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Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 International License.

You are free to re-use this data but YOU MUST CITE AS: Rothamsted Research (2019), Soil fumigation experiment. Residual effect of "cymag," carbon disulphide jelly, chlordinitrobenzene and "seekay"; Effect of sulphate of ammonia, Pastures, Rothamsted, 1936. Electronic Rothamsted Archive https://doi.org/10.23637/OA-OE-1936004-1

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    Publication Date

    Publication date V1. 2019/05/01
    Last updated V1. 2019/09/11

    Rothamsted relies on the integrity of users to ensure that Rothamsted Research receives suitable acknowledgment as being the originators of these data. This enables us to monitor the use of each dataset and to demonstrate their value. Please send us a link to any publication that uses this Rothamsted data.


    Numbers of eelworms in soil before and after fumigant treatments - Residual effects. This dataset consists of the plan, treatments, cultivations, yields and numbers of nematode eelworm cysts relating to the fumigation Experiment conducted in the field, Pastures, at Rothamsted Experimental Station, in 1936, following on from 1935. Two random samples of 50 grms soil were taken per half plot Dec 1 and 2 and third cysts count made.

    This experiment is originally documented in the Rothamsted Annual Report of 1936 pages 211-212 as digitally archived in eRADoc; Other Experiments at Rothamsted (1937) Report For 1936, pp 211-212 - DOI: https://doi.org/10.23637/ERADOC-1-68.

    See Soil Fumigation Experiment 1935 for the next years results.

    Use as an agricultural dataset for statistical techniques

    The first part of this experiment, Soil Fumigation Experiment 1935, was used as the source of data and information for agricultural data package in Package 'agridat' July 2018 page 108 "cochran.eelworms; Counts of eelworms before and after fumigant treatments'' https://cran.r-project.org/web/packages/agridat/agridat.pdf which in turn was sourced from Cochran and Cox, 1950 Experimental Designs. Table 3.1. This second part of the experiment provides extra data for analysis from a third cyst count in relation to fumigant treatments.

    This dataset consists of 48 observations with 4 randomised blocks of 12 treatment plots. The yields in the Tables and Summary Tables are in different quantities; the conversion factors for cwt/acre to tonnes/ha is 0.1255, for cwt/acre to kg/ha is 125.5 and for lb/acre to kg/ha is 1.121.

    Publication: Soil fumigation experiment. Residual effect of "cymag", carbon disulphide jelly, chlordinitrobenzene and "seekay". Effect of sulphate of ammonia.

    Soil fumigation experiment. Effect of cymag, carbon disulphide jelly, chlordinitrobenzene and seekay

    Table 1. Plan and yields total produce in grams above, weeds in lb. centre, 3rd cyst count below*


    The position of the blocks in the field were slightly different from those shown above.

    *Number of cysts per 400 grams of soil.

    Area of each plots: 1/80 acre (30lks. X 41.7 lks.).
    Treatments: No fumigant (O), single (1) and double (2) dressings of cymag (CM), carbon disulphide jelly (S), chlordinitrobenzene (N) and seekay (CK), at the following rates of application per acre for the single dressing: 1 CM, 7.5 cwt.; 1S, 24.3 cwt.; 1N, 2.0 cwt. and 1CK, 5.0 cwt., applied in 1935.
    Sulphate of ammonia (A) at the rate of 0.4 cwt. and 0.8 cwt. N per acre, applied in 1936.
    Basal Manuring: Nil.
    Cultivations, etc: Ploughed: Aug. 27-29 and Feb. 10-March 13. Spring-tine harrowed: March 19. Rolled, harrowed, sulphate of ammonia applied and drilled; March 20. Harrowed: May 8. Rolled: May 9. Harvested: Aug. 7. Variety: Marvellous. Previous crop: Oats. (See 1935 Report, p. 176).
    Special Note: The entire produce was weighed, Oats plus weeds. Weight of oats was determined by sampling a strip 30 lks. X 1 yd. Third cysts count; Dec. 1 and 2. Two random samples of about 50 grms. of soil were taken per half plot.
    Standard Errors per plot: Weeds: 22.4 cwt. per acre or 19.8%. 3rd cyst count: sampling error 32.3 or 16.6%; experimental error 59.9 or 30.7%.

    Table 2. Summary of Results

    Table 2 1936

    Standard Error: * +/-7.92.
    ** No single standard error is applicable to this table.

    Third cyst count (+-30.0)
    Chlor-dinitro benzene
    Carbon disulphide jelly
    Suplhate of ammonia
    None ..
    Single ..
    Double ..
    Mean of single and double .. (+/-21.2)

    Standard error: * +/-21.2
    From: Other Experiments at Rothamsted Report For 1936, pp 211 - 212 - https://doi.org/10.23637/ERADOC-1-68
    Soil fumigation experiment. Residual effect of cymag, carbon disulphide jelly, chlordinitrobenzene and seekay. Effect of sulphate of ammonia.
    Table page 212.


    The effects of the fumigants applied in 1935 on the numbers of cysts in December 1936 were not significant.
    The yields of oats were negligible except on the plots which had been fumigated with carbon disulphide jelly. In particular, the application of sulphate of ammonia in 1936 failed to produce a reasonable crop. Seekay produced a large reduction in weeds.

    Download the Data

    This dataset is presented as a downloadable Excel Spreadsheets:

    Table 1. Plan and yields 1936

    Table 2. Summary of Results 1936

    and as a sorted dataset for statistical analysis:

    Combined results: Eel cyst counts and yields 1936

    Key Reference

    "Soil fumigation experiment. Residual effect of "cymag," carbon disulphide jelly, chlordinitrobenzene and "seekay". Effect of sulphate of ammonia, Rothamsted Report for 1936, pp 211-212. DOI: https://doi.org/10.23637/ERADOC-1-68

    Provenance & Quality

    This is transcribed from the Rothamsted Annual Report for 1935 and checked for quality control.


    Experimental design
    Statistical data


    Sarah Perryman, Margaret Glendining, Richard Ostler


    Rothamsted Research.

    Contact details

    Please contact the e-RA Curators for further information.

    e-RA Curators,
    Department of Computational and Analytical Sciences (CAS)
    Rothamsted Research
    Harpenden, Herts, AL5 2JQ

    email: era@rothamsted.ac.uk


    The Long-term Experiments and weather stations are supported by the Lawes Agricultural Trust and BBSRC National Capability Funding (BBS/E/C/000J0300) recognising the national and international importance of the data.

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