Type of Variable 0 Type of Variable 0

(1)

Type of variable

(2)

The Type of Variable

a. Independent variable: variable influence

or have effect on dependent variable

b. Dependent variable: variable influenced

or give response to independent variable

c. Antecendent variable: variable influence

on independent variable

d. Random variable: variable does not

influence on dependent variable

(3)

The Kind Of Variable

f. Suppressor /nuisance/extraneous/variable: variable

besides on independent variable which influence

on dependent variable

This variable must be controlled become random

variable/control variable

In the research method, these variables must be

described explicitly on procedure

g. Substitute variable/observation: replacer

variable/observation of dependent variable if the

dependent variable is difficult to be observed

h. Covariate variable/concomitant

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THE INFLUENCE OF PHOSPHATE FERTILIZER CONSENTRATION ON THE PRODUCTIVITY OF CORN SEED

i. IND VAR : PHOSPHATE FERTILIZER CONSENTRATION  AS FACTOR

DECLARE THE NUMBER OF FACTOR LEVEL  3 LEVEL IN LABORATORY EXPERIMENT: 0 G/POLYBAG, 2 G/POLYBAG, 4 G/POLYBAG , OR

4 LEVEL IN FIEPD EXPERIMENT: 0 KG/HA, 10 KG/HA, 20 KG/HA, 30 KG/HA

II. DEP VAR (AS PRIMERY OBSERVATION ): PRODUCTIVITY OF CORN SEED CAN BE MEASURED (WITHOUT SUBSTITUTE

OBSERVATION/PARAMETER)

III. SUPPRESSOR VAR : A. FROM OBJECT

1. VARIETY OF CORN  MENTION THE VARIETY OF CORN IN THE RISEARCH TITTLE

2. VIABILITY OF CORN SEED  DECLARE THE VIABILITY OF CORN SEED IF THE EXPERIMENT STARTED BY PLANTING THE SEED (OR DECLARE THE SEEDLING SIZE  THE HEIGHT OF SEEDING IF EXPERIMENT

(5)

B. MEDIA

1. MEDIA DETERMINED BY LOCATION  DECLARE LOCATION OF

EXPERIMENT (WONOSARI  LIME SOIL , , PONTIANAK  PEAT SOIL)

2. LABORATORY EXPERIMENT a) MEDIA

1) SOIL TYPES  DECLARE THE SOIL TYPE IN THE RESEARCH PROCEDUR

2) ADDITIONAL DROPSY FERTILIZER  DECLARE THE ADDITIONAL DROPSY FERTILIZER ON THE SOIL

3) THE SOIL HOMOGENITY  DECLARE THE SOIL WAS MIXED IN ORDER TO HOMOGEN

4) POLYBAG SIZE  DECLARE THE VOLUME OR DIAMETER OF POLY BACK

5) THE SOIL VOLUME  DECLARE THE SOIL VOLUME IN EACH POLYBACK

6) DAILY ADDITIONAL WATER  DECLARE ADD WATER UNTIL THE SOIL BECOME SATURATED.

C. CLIMATIC FACTOR

1. FILED EXPERIMENT

DETERMINED BY MONTH OF EXPERIMENT IS IMPLEMENTED) 2. LABORATORY EXPERIMENT

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D. MEDIATOR VAR

a) AS EXPLANATORY VAR (IF DATA WERE

COLLECTED)  DRY WEIGHT OF ROOT, STEM

AND LEAFS

b) AS INTERVENING VAR (IF DATA WERE NOT

COLLECTED  TO DESCIBE ON THE LITERATURE

SUTDY)  THE CON SENTRATION OF PHOSPHATE

ON THE SOIL AFTER FERTILIZATION, INTENSITY

OF ROOT ABSORBSION, INTENSITY OF

METABOLISM PROCESSES, LOCATION OF

DEPOSITION OR ACCUMULATION THE

METABOLISM RESULT

D. RANDOM VARIABLE  EXAMPLE: SEX OF

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