Intro to Irrigation

2. land is cut into steps and supported by retaining walls
5. amount of soil moisture or water content held in soil after excess water has drained away after irrigation or rain
6. action of applying water to land in order to supply crops and other plants with the necessary water for growth
8. composition of the soil in terms of the proportion of small, medium and large particles in a soil mass
10. water is piped to one or more central locations and distributed by overhead high pressure sprinklers or guns
11. situation when a plant wilts beyond recovery due to a lack of water in the soil
13. application of fertilizer through the irrigation system
14. application of herbicides and insecticides through an irrigation system to deliver the product to the crop or soil surface
15. rate at which a crop uses water for transpiration and growth plus evaporation from the soil surface
16. quantity of water contained in a soil

1. amount of water located between the large and small pore spaces in the soil
3. amount of water held in a soil between field capacity and the permanent wilting point; it represents the quantity of water available or usable by the plant
4. water moves over and across the land by gravity flow in order to wet and infiltrate the soil
7. practice of applying the correct amount of water at the correct frequency to supply the water needs of the plants
9. system where water is distributed under low pressure through a piped network in a predetermined pattern and applied as a small discharge to each plant or adjacent to the pipe
12. water is delivered to the plant root zone from below the soil surface and absorbed upwards