[page VI↓]

List of Abbreviations


[page VII - VIII↓]

°

Degree

Smallest still detectable differences in the measurement values

α

Angle of deviation of the pendulum meter given in degrees

µG

Friction coefficient between two surfaces

a

Intercept of the regression equations

a

Acceleration

ATB

Institute of Agricultural Engineering

B

Fixed side of the cantilever in equation 1, here the root

B

Position of undeviated cylindrical body

B’

Position of deviated cylindrical body

BBCH

Uniform code for development stages of arable crops

bx

Linear regression coefficient

CV

Coefficient of variation

cx2

Square regression coefficient

DAS

Days after seeding in rice

DAT

Days after transplanting in rice

DGPS

Differential global positioning system

di

Inner diameter of the stem

DM

Dry mass

do

Outer diameter of the stem

e

Height of the centre of gravity

E

Elasticity of the material, here Young’s modulus

EI

Bending rigidity of the stem

F

Force

FA

Force of the pendulum at 90° deviation

FF

Friction force

FH

Horizontal force component of the pendulum

FM

Fresh mass

FP

Force of the pendulum

FR

Resultant force

FV

Vertical force component of the pendulum

G

Gravity point or centre of gravity of a body

GPS

Global positioning system

hA0

Height of the cylindrical body of the pendulum

hP

Height of the pivot point of the pendulum

hPl

Height of plants

I

Second moment of the area

IDW

Inverse distance weighted (interpolation method)

IR 64

Paddy rice, IRRI-released variety 64

IR 72

Paddy rice, IRRI-released variety 72

IRRI

International Rice Research Institute

JB

Mass moment at the fixed side B of a cantilever

JG

Mass moment in the gravity point G

K

Potassium

LAI

Leaf area index

lin.

Linear

lP

Length of the pendulum

m

Mass of a body

max.

Maximum

min.

Minimum

m P

Mass of the pendulum at 90 degree deviation

m S

Mass of the stems including mass moment of inertia

n

Sample size in equation 8

n

Number of measurements to be reduced in equation 9

N

Nitrogen

NDVI

Normalised difference vegetation index

nS

Number of stems

P

Pivot point

P

Phosphorus

p

Page

PPM

Parts per million

r

Height of the contact point between pendulum and stem

R2

Goodness of fit

RMb

Bending moment of resistance

s

Standard deviation in equation 8 from KÖHLER et al. 1992

SD

Standard deviation

SE

Standard error of estimate (in this work standard error of the regression)

v

Average of the vector

vD

Driving velocity

WGS 84

World geodetic system of 1984

x

Bending distance of the stem

xi

Length of the horizontal vector component

y

Dependent variable in the regression equation, here the angle of deviation

yi

Length of the vertical vector component


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