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"lang": "en",
"subject": "crop yield",
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{
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"subject": "farmyard manure",
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{
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"subject": "nitrogen fertilizers",
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{
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"subject": "rothamsted research",
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{
"lang": "en",
"subject": "rothamsted classical experiments",
"subjectScheme": "wikidata"
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{
"lang": "en",
"subject": "broadbalk long-term experiment",
"subjectScheme": "wikidata"
},
{
"lang": "en",
"subject": "park grass long-term experiment",
"subjectScheme": "wikidata"
},
{
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{
"lang": "en",
"subject": "hoosfield alternate wheat and fallow long-term experiment",
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{
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"subject": "exhaustion land long-term experiment",
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{
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"subject": "geescroft wilderness experiments",
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"subject": "agdell long-term experiment",
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"subject": "barnfield clover long-term experiment",
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"subject": "grasslands",
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{
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{
"lang": "en",
"subject": "viral diseases",
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"subject": "insecticides",
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{
"lang": "en",
"subject": "disease surveys",
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"lang": "en",
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"lang": "en",
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"date": "1932",
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"description": "Rothamsted Experimental Station Report for 1931.....................................................1
Rothamsted Laboratories , Erected 1914-1916.........................................................2
Contents............................................................................................4
Rothamsted Experimental Station; Woburn Experimental Farm; And Imperial Bureau of Soil Staff List...6
Publications Of Rothamsted Experimental Station.....................................................13
Introduction - General Account Of Rothamsted........................................................17
Rothamsted Report For The Year 1931.................................................................20
FIELD EXPERIMENTS...................................................................................20
Fertilisers on Grassland............................................................................20
Home Grown Food For Animals.........................................................................27
Potatoes ...........................................................................................28
Barley..............................................................................................30
Sugar Beet .........................................................................................31
Experiments At Outside Centres......................................................................33
SOIL FERTILITY AND MECHANISATION....................................................................35
ELEMENTS NEEDED BY PLANTS IN SMALL QUANTITIES.......................................................38
METHODS FOR AGRICULTURAL SOIL SURVEY................................................................39
GENERAL MICROBIOLOGY................................................................................40
BACTERIAL NUMBERS AND SOIL FERTILITY................................................................40
FUNGAL NUMBERS......................................................................................41
VIRUS DISEASES......................................................................................42
BACTERIAL DISEASES..................................................................................43
FUNGUS DISEASES ....................................................................................44
INSECT PESTS........................................................................................45
INSECTICIDES........................................................................................46
BEES................................................................................................47
SURVEY OF FUNGUS DISEASES AT ROTHAMSTED AND WOBURN..................................................49
SURVEY OF INSECT PESTS AT ROTHAMSTED AND WOBURN.....................................................52
FIELD PLOT TECHNIQUE................................................................................57
ACCURACY OF FIELD EXPERIMENTS.......................................................................59
ROTHAMSTED FARM REPORT..............................................................................61
METEOROLOGICAL OBSERVATIONS.........................................................................66
Summaries of Papers Published In 1931 - I. Scientific Papers .......................................68
CROPS, PLANT GROWTH, PLANT PRODUCTS AND ACTION OF MANURES...........................................68
STATISTICAL METHODS AND RESULTS.....................................................................74
THE SOIL............................................................................................77
SOIL ORGANISMS......................................................................................80
THE PLANT IN DISEASE : CONTROL OF DISEASE...........................................................84
Summaries Of Papers Published in 1931 II. Technical and Other Papers ...............................89
GENERAL.............................................................................................89
CROPS, SOILS AND FERTILISERS........................................................................90
BIOLOGICAL..........................................................................................91
Woburn Experimental Farm :..........................................................................93
Woburn Experimental Farm Report For 1931............................................................93
Report by Mr H. G. Miller..........................................................................100
Rothamsted Experimental Plots, 1931.................................................................108
THE USE OF THE SUMMARY TABLES.......................................................................108
THE CLASSICAL EXPERIMENTS...........................................................................109
Errata for Rothamsted Report for 1930...............................................................127
CONTINUOUS ROTATION EXPERIMENTS.....................................................................129
OTHER EXPERIMENTS AT ROTHAMSTED.....................................................................141
OTHER EXPERIMENTS AT WOBURN.........................................................................160
EXPERIMENTS AT OUTSIDE CENTRES......................................................................166
Lawes Agricultural Trust; Trustees And Committee; The Incorporated Society for Extending the Rothamsted Experiments..199
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