Rothamsted Experimental Station Report for 1969 Part 2 (1970)
Published by Lawes Agricultural Trust, Harpenden, Herts, United Kingdom
Thank you for using eradoc, a platform to publish electronic copies of the Rothamsted Documents. Your requested
document has been scanned from original documents. If you find this document is not readible, or you suspect there are
some problems, please let us know and we will correct that. Clicking on a page while viewing the PDF will take you to
its original scan online which has a higher resolution.
Rothamsted Experimental
Station Report for 1969 Part 2
Full Table of Content
Conversion Factors / Conversion Tables
Conversion Factors / Conversion Tables, (1970) Rothamsted Experimental Station Report For 1969 Part 2, pp 190 - 191 GRID: ResReport1969p2-190-191
ResReport1969p2-190-191
pp 1
Rothamsted Experimental Station Report for 1969 Part 2 (1970)
CONVERSION FACTORS
FsctoG fo( the Cotrv€Ision of Imp€risl to Medc Units
: 2'540 centimetres (cm)
: 3o''18 crn
12 in.)
: 0'91,14 netre (m)
I yard (yd) (:3 ft)
: 0'8361 sq m
I square yard (sq yd)
: 0'4047 hectare (ha)
I acre (:1840 sq yd)
: 28'35 erams G)
I ounc€ (oz)
: 0'4536 kilosram (kg)
(b)
I pound
I hundrcdweight (cwl) (:112lb): 50'80 kg
: 1016 kg: 1'016 nr€tric tons (tonn€s)
1 ton (:22,10 lb)
: 0'5682litre
pint
I
: 4'5'16litre
r galon GBI) (:8 pints)
: 0'02841 litre: 28'41 nl
I fluid ounce: U20 pint
:28'32itre
I cubic foot
(in.)
1 foot (ft) (:
1 inch
MuhblY bY
contefi
70{6
ozlacre to gAa
l'l2l
lb/acre to kg/ha
125'5
cwt/ase to kg/la
01255
cwt/acre to tonrcs/tra
25ll
tons/adp to kg/ha
2'511
tols/acre to tonnes,/ha
1l'233
to
litre/lla
Eauacre
To
TIE
It
ldlovi,a facrott orc cccan e ro obM 2 Ports b
I lb/acre : 1'1 kg/ha
1 Sallon/acre : 1l litreAa
I ton/acre : 2'5 tonnes/ha
gctcrol rca&g ol lhe ,cxt
u $a
llb:05ks
tbrc rill
bc
n:
iuccrrqcy in rqarditE:
llb/ac{€:1k8/ha
Temperatuts
To convert 'F into 'C subtract 32 and multiply by * (0'550
To convert 'C into 'F multiply by g (l'8) and add 32
lm
ResReport1969p2-190-191
pp 2
Rothamsted Experimental Station Report for 1969 Part 2 (1970)
Factors for the Conversion of Metric to ImDerial Udts
I c€ntimetre (cm)
I metre (m)
I square metre (sq m)
I hectare (ha)
I gxam (g)
I kilogram (kg)
lkg
I metric ton (tonne)
I litre
I litre : 1000 mililitres
:
:
:
:
:
:
:
:
:
(ml) :
0'3937 inch (in.):0.03281
1.196 square yanls (sq yd)
2.471 acrcs
0.03527 ouuc€ (oz)
2'205 pounds (lb)
0'01968 hundredweight (cwt)
:
0.0009842 ton
0'9842 ton
1.760 pints: O.22OO galon Gal)
35.20 fluid ouoces
0.03531 cubic foot
:
To come
Multiply by
glha to ozlacre
kg/ha to lb/acre
kglha to
ft
1.094 yards (yd)
o'0147
0.8921
0.007966
6 tlaqe
toDnes/ha to cwt/acre
7.966
ka/ha to tons/acre
tonnes/ha to toos/acre
litre/ha to gal/acre
0.0003983
0.3983
0.08902
Plaot trutienis
P-lant nutrients are best stated in terns of amo-uDts of the elemenh (p,
Cg, Mg, S): the old 'oxide' terminology pzOs,_KrO, N"lij, Ciij,'ilgq
K, Na,
loO i,
'R-egui"ii;;'
still used in-work invotving fertitiseii and timinj ,i;A
;eqiiir;
statements
of PzOa, KaO, etc.
For qaick convetsbas
(accurate to withitr 2ZJ the following factors may be used:
2j x P :
PzOs
llxK : KsO
lfxCa:CaO
l3 x Mg: MsO
?xPrOE:P
*xKrO:K
iixCaO:Ca
IxMgO:Mg
For accutate coayenioas :
Io coaw
PsOs
to P
K2O to K
CaO to Ca
MgO to Mg
Maltiply by
Mllfuly by
o-43U
To con ett
P to P2Oi
0.830t
K to KzO
t.2047
0.7146
Ca to CaO
1.3994
0.603r
Mg to MgO
1.6581
2.2915
l9t
ResReport1969p2-190-191
pp 3