Experimental and trail design A

Question 1

experiment

Answer 1

a controlled test.
1 variable changed at a time
indépendant variable ( changed by the experiemtee)
dependant variable (changed in response to the experiment)

Question 2

how to organise an experiment

Answer 2

plan and design experiment
be aware of safety procedures
organise at random
use large enough sample size
control group
change one factor at a time
measure changes
analyse the results
state possible sources of error
repeat experiment

Question 3

replication and randomisation

Question 4

Low input system

Answer 4

low levels of 1 input means there is no need (requirement/response to other inputs (crop protection.

Question 5

High intensive input system- h

Answer 5

high levels of one input means there is a need requirement/ to medium high levels of another input (crop protection).