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1. Which of the following elements is not taken up from the soil?
A. Potassium
B. Magnesium
C. Carbon
D. Calcium
E. Sulfur
Jawaban : C. Pembahasan: The plan obtains carbon and hydrogen dioxide from the atmosphere. Carbon dan hydrogen diambil dari atmosphere.
2. Why do farmers prefer considering the only available nutrients to the total quantities of nutrient found in the soil? Because ...
A. they do to know how to obtain all the nutrients
B. chemical analyses indicate that the soil constrains all the nutrients needed
