When it comes to modelling terrestrial storage of carbon, the models account for the increasing effect of carbon dioxide fertilization (C), but they do not (except for two models) account for the effects of nitrogen fertilization (N) and none of them, phosphorus (P). (critical-angle.net)
When he tested soils from the experimental plots, he saw soil organic carbon concentrations rise gradually with increases in nitrogen fertilization at soil depths from 0 to 6 inches, although not at deeper ones. (sciencedaily.com)
Causal agents: Blossom - end rot occurs when the plant is unable to take up adequate calcium, a condition caused by fluctuating soil moisture (drought or overwatering), high nitrogen fertilization, or root pruning during cultivation. (fieryfoodscentral.com)