Table of Contents
What are the variables in plant growth?
Plant growth is affected by several factors such as seed variety, amount of water, soil type, amount of light, temperature, humidity, and other. The factors are displayed in the diagram below. You will use two variables in the experiment: seed variety and amount of water.
What type of variable is variety of plants?
Parts of the experiment: Independent vs dependent variables
| Type of variable | Definition | Example (salt tolerance experiment) |
|---|---|---|
| Control variables | Variables that are held constant throughout the experiment. | The temperature and light in the room the plants are kept in, and the volume of water given to each plant. |
What are controlled variables for plants?
Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable. They are also grown in the same sized pot and given an equal amount of water. Both of those are also control variables, or constant variables.
What type of variable is a tomato plant?
independent variable
The independent variable is the variety of tomato.
Is height or weight an independent variable?
The variable you’re most interested in is known as the dependent variable, because it might be dependent on, or affected by, something else that you’ve measured, which is therefore an independent variable. For example people’s weight (dependent variable) might depend on their height (independent variable).
How many seeds to plant per square foot?
For conservation purposes, seeding rates have been established to achieve the desired plant density of around 20-60 live seeds per square foot. These figures are fairly standard when figuring seeding rates except when you are dealing with very large or very small seed sizes (e.g. eastern gamagrass vs. bermudagrass).
What do you need to know about seeding?
Seeding is defined as the amount of seed of an individual species that’s needed to achieve an adequate stand. This is expressed in pure live seed (PLS) pounds per acre and is based on planting a predetermined number of live seeds per square foot to achieve a specific plant density.
How to calculate the population of soybeans per acre?
170,000 plants per acre (Desired Plant Population) = 209,505 seeds per acre 0.92 (Percent Germination) x 0.98 (Percent Pure Seed) x (Seeding Rate) 0.90 (Percent Live Seed Emergence) When deciding the amount of soybean to seed, growers may need to consider other conditions on a field-to-field basis.
What do you need to know about germination of seeds?
Seeds Need the Right Environment to Germinate. Temperature, moisture, air, and light conditions must be correct for seeds to germinate. All seeds have optimal temperature ranges for germination (Table 1).