What is one possible problem that might occur if a plant were constantly bottom watered?

What will be an ideal response?


The dissolved fertilizer salts are never flushed out and can accumulate to toxic levels.

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Do metals (such as steel and aluminum) expand or contract greater than plastics, such as (polyethylene and nylon) when subjected to the same temperature change?

What will be an ideal response?

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Which of the following is needed for a noncontact tachometer to read the speed of a blower or pulley?

a. A calculator for the relevant equation b. Near darkness c. A reflective spot or piece of tape d. An infrared receiver

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Saline seeps appear where glacial till overlays an impermeable layer. During fallow, increased

percolation picks up salts and carries them deeper into the soil. When salty water reaches the tight layer, it spreads out sideways, flowing downslope underground. The salty water seeps to the surface on a lower field and the water evaporates leaving salt on the soil surface.

Indicate whether the statement is true or false.

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When making GTAW V-groove welds on aluminum plate, clean each completed weld with a(n) _____

a. bastard file b. chipping hammer c. aluminum wire brush d. stainless-steel wire brush

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