Nitrogen is taken up by plant roots in the form of? by Sunday | Jun 12 | Agricultural Science WAEC | 0 comments A. nitrate ion B. nitrite ion C. nitric acid D. nitrogen gas Correct Answer: Option A – nitrate ion Users Also Read These:If urea fertilizer contains 46% nitrogen. calculate…Atmospheric nitrogen is converted to soil nitrogen…If the cross of a red-flowered plant with a white…In the nitrogen cycle, the nitrates in the soil are…If the percentage of nitrogen in ammonium sulphate…