Which of the following micronutrients becomes more available for plant uptake as soil pH is increased from pH 6 to pH 8?
A) manganese
B) boron
C) zinc
D) iron
E) none of the above
E
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The casting in the accompanying figure shows seven tapped holes, A-G. The number of threads is determined by dividing the depth of the thread by the thread pitch. Find the number of threads in hole D. All dimensions are in inches.
A. 3 B. 4 C. 6 D. 7
Growing plants from seed is more expensive than growing them from cuttings
Indicate whether the statement is true or false
Thyroid hormones are derived from the amino acid
A) lysine. B) leucine. C) glycine. D) tyrosine. E) thyronine.
If the motor is operating at a low speed and a higher speed is selected, the motor immediately increases to the next higher speed if it has been operating in its present speed for more than ____.
a. 3 seconds b. 30 seconds c. 1 minute d. 3 minutes