S-2 Flashcards
It is a systematic collection, classification, and analysis of data.
Scientific method
A critical and exhaustive investigation or experimentation having for its aim the discovery of new facts and their correct interpretation.
Research
Assumptions about population parameters.
Statistical hypothesis
States that, “there is no difference between treatments tested”.
Null Hypothesis
A relatively small part of a population from which information can be derived to be imputed on the population
Sample
This procedure of sampling is done when the researcher seeks for samples needed or desired.
Purposive sampling
Gives a valid estimate of experimental error and minimize bias in results.
Randomization
Repeating the set of treatments to be compared as many times as possible.
Replication
A variation in field experiments due to genetic differences.
Plant variability
Refers to the field plot layout for plant experiments or arrangement of treatments assigned to cages for animal experiments.
Experimental design
What are the kinds of hypothesis
- Null Hypothesis
- Alternative Hypothesis
What are the types of error
- Type I Error
- Type II Error
General types of experiments related to agriculture
A. Field experiments in agronomy
1. Crop Variety Tests
2. Cultural studies
3. Fertilizer experiments
4. Pesticide experiments
5. Crop rotation tests
6. Pasture experiments
7. Perennial crop
8. Greenhouse/pot experiments
9. Breeding to develop new strains or varieties
B. Animal Science
1. Feeding trials
2. Carcass evaluation studies
3. Animal breeding and selection for production traits
4. Ecological studies
5. Processing studies
6. Animal health studies
Sources of variation in field experiments
- Variation due to plant
- Variation due to season
- Soil heterogeneity
Sources of variation in greenhouse studies
- Temperature gradients caused by ventilators or heating pipes
- Shading effects due to structure of the houses, adjacent buildings, or trees
- Moisture differentials caused by water application or by air currents.
- Pot-to-pot variation due to smaller number of plants per pot.