Water Quality & Media
This water quality parameter refers to dissolved liming content rather than acidity.
What is alkalinity?
Irrigation is often described as both a science and this.
What is an art?
This irrigation method allows the grower to individually assess each plant’s needs.
What is hand watering?
This combination produces the fastest water loss from media.
What is high heat and low humidity?
This person is considered to have the most important job in the greenhouse.
Who is the person holding the hose?
This term describes media holding all the water it can retain.
What is container capacity?
Permanent wilting point causes this below-ground consequence.
What is root dieback?
This overhead irrigation system is the cheapest automated option to install.
What is a riser-line sprinkler?
On cloudy and humid days, irrigation is generally handled this way.
What is usually not watered?
Growers commonly determine irrigation timing by checking this physical trait.
This media characteristic provides a balance between air space and water retention.
What is porosity?
Watering each pot to container capacity requires applying approximately this much excess water for leaching.
What is 10-15% more water?
This irrigation system uses individual tubes connected to emitters.
What is a drip system?
The edges of container media dry faster because of these two factors.
What are wind and sun exposure?
Overwatering is caused by watering too this.
What is too frequently?
This substrate component has excellent water-holding capacity but can become difficult to rewet if overly dry.
What is peat moss?
This process accounts for the greatest water loss during rapid crop growth.
What is transpiration?
This automated overhead system is considered the most accurate for water distribution.
At 8 a.m., 90°F, and 60% humidity, irrigation is recommended. T/F
True
This problem develops when media remains excessively wet and poorly aerated.
What is root rot?
These additives are commonly included in media to improve rewetting.
What are wetting agents?
Applying too little water too often creates this problem in plug trays.
What is a dry zone at the bottom of a plug?
This subirrigation system reaches approximately 90% water-holding capacity within two minutes.
What is flood-sub irrigation?
At 3 p.m., 90°F, and 80% humidity, irrigation is generally avoided because of this factor.
What is reduced Evaporation due to high humidity?
One study found riser-line systems retained only about this percentage of applied water in substrate.
What is 30%?