1.
Amount of water actually lost from the soil, including that by direct evaporation, and that by transpiration from the surfaces of plants.
2.
An organism that is capable of making its own food by photosynthesis.
3.
About 90 percent of what you can do for any annual crop is done at planting time.
4.
An interacting group of living individuals.
5.
Damage resulting from the relationship between two or more plants in which the supply of a growth factor falls below their combined demands.
6.
The shortage or absence of something essential.
7.
A system made up of a community of animals, plants, and bacteria and its interrelated physical and chemical environment.
8.
All the living and non-living components in an ecosystem and their interactions.
9.
Changing from a liquid to a vapor or gas.
10.
Any element in the diet of an organism whose absence affects normal growth.
11.
Obtaining food from organic material only. Is unable to use inorganic matter to form proteins or carbohydrates.
12.
An environmental factor that limits the growth or activities of an organism, or that restricts the size of a population or its geographical range.
13.
Any of the chemical elements, as carbon, required in relatively large quantities for plant growth.
14.
The act, art, or manner of managing or handling; controlling or directing.
15.
Any of the chemical elements, as iron, required in minute quantities for growth of an organism.
16.
The total water loss from the soil, including that by direct evaporation, and that by transpiration from the surfaces of plants.
17.
Strain or straining force.
18.
Any circumstance, event or condition that accompanies something, and indicates its existence or occurrence.
19.
The amount of variation allowed from a standard accuracy. The ability to endure. The natural or developed ability to resist the effects of the environment.
20.
The giving off of moisture through the surface of leaves and other parts of plants.
