One of the cornfields involved in the studies had an area of 2.5 hectares. In Study 2, how many kg N was added to that field as fertilizer N ?A.60 kg NB.100 kg NC.240 kg ND.300 kg N
题目
One of the cornfields involved in the studies had an area of 2.5 hectares. In Study 2, how many kg N was added to that field as fertilizer N ?
A.60 kg N
B.100 kg N
C.240 kg N
D.300 kg N
参考答案和解析
正确答案：D
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