This methodological manual provides basic information to estimate the net primary productivity (NPP) of historical and contemporary cropland, in terms of fresh and dry matter, and gross energy. The methodology and the proposed conversion factors can be applied to any region of the planet, with...

The purpose of this paper is to provide interested researchers with a simple tool to evaluate the efficacy of different methods of fertility replenishment that have accompanied and made possible the contemporary agriculture. We propose a nutrient balance model created especially to be applied to...

The main objective of this work is to reconstruct the consumption of the different types of energy by the Spanish agri-food system (AFS) between 1960 and 2010. The initial hypothesis, of a high increase in energy consumption during that period, was derived from the evidence of a growing...

This paper shows the potential of the Social Metabolism approach to study the industrialization of the agriculture. It provides information about the physical functioning of agrarian systems over time and their spatial differences. It also sheds light on how the industrialisation of agriculture...