When leaves of crop plants show brownish coloration from the tips of the mid-ribs backward, they are showing deficiency symptom of?
A. magnesium B. zinc C. nitrogen D. copper E. phosphorus Correct Answer: Option E – phosphorusIn which layer of the soil profile does most biological activity occur?
A. parent material B. D-horizon C. C-horizon D. B-horizon E. A-horizon Correct Answer: Option E – A-horizon
Granite is?
A. a sedimentary rock B. a weathered rock C. metamorphic rock D. an igneous rock E. a plutonic rock Correct Answer: Option D – an igneous rockWhich of the following factors influence agricultural production is biotic factor?
A. parasite B. soil PH C. topography D. soil texture E. temperature Correct Answer: Option A – parasiteProducts
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