The ratio between C and N crop residue generally ranges between __ ?
When the decomposition of fresh organic residues reaches to the stage where the C: N ratio is 20:1 there is an increase in the availability of N.
Which figure should replace the question mark (?) if the series were to continue?
Find out the missing figure (?) of the problem from among the given answer figures.
Select the figure from the alternatives which will complete the pattern in given question figure.
Which of the given figures when placed in the 5th position would continue the series that is established by the first four figures?
