What are five different ways to prevent pests from entering greenhouses? After pests have entered the greenhouse, what are several ways to get rid of them?
What will be an ideal response?
Preventing pest entry:
• Screens
• Weed control inside and outside the greenhouse
• Sanitation practices
• Crop inspection
• Environmental manipulation
Getting rid of pests:
• Biological control works well unless the population of pests gets too high, in which
case a combination of chemical, genetic, cultural, and mechanical control should be
used
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A storage bin side is 15.7 cm by 24.3 cm. How many pieces 3.2 cm by 5.6 cm can be cut from it?
What will be an ideal response?
What is positive displacement?
What will be an ideal response?
In a dc electrical circuit with a single voltage source, electrons flow through the circuit (outside of the voltage source) from
A. the positive side of the voltage source to the negative side. B. the negative side of the voltage source to the positive side. C. the surrounding air to the circuit components.
What is the capacitance of a capacitor that drops 50 V and stores 0.500 ?C of charge?
A) 0.001 ?F B) 0.01 ?F C) 1 ?F D) 0.1 ?F