This study examined the responsiveness of biological assets to board size, firm size and firm age of quoted Agricultural firms in Nigeria. The specific objectives were to examine the effect of board size, firm size, and firm age on the biological assets of quoted Agricultural firms in Nigeria. An ex-post facto research design was used which made use of secondary panel data drawn from annual reports and accounts of the sampled firms for a period of ten (10) years, 2011-2020. Panel least squares were applied in the test of hypotheses. The result of the analysis showed that board size, firm size and firm age have an insignificant effect on biological assets. The implication is that none of the three variables can predict the increase or decrease in biological assets of agricultural firms in Nigeria. The study recommends that agricultural firms should maintain a robust board size so that they can continue to reap the benefits of the two good heads theory. Efforts should be made to ensure continuous firm growth because of the positive link it has with biological assets. Firms are encouraged to continuously effect changes in both assets and other activities that may be affected by the age of the firm. Management should maintain current innovations in the industry to attract new investors, boost productivity and enhance shareholders’ funds.