Fig. 5From: Experimental archaeological study in China: implications for reconstruction of past manuring and dietary practices indicated by δ15N values of Setaria italica and Panicum miliaceumThe relationship between δ15N values of grain and leaf for Panicum (a) and Setaria (b). The r-value reports the Pearson product-moment correlation coefficient and P-value at a significance level of 0.05Back to article page