Soil organic carbon (SOC) and nitrogen (N) contents are controlled partly by plant inputs that can be manipulated in agricultural systems. Although SOC and N pools occur mainly in the topsoil (upper 0.30 m), there are often substantial pools in the subsoil that are commonly assumed to be stable. We tested the hypothesis that contrasting long-term management systems change the dynamics of SOC an...

Considerable efforts are focused on the consequences of climate change for tropical rainforests. However, potentially the greatest threats to tropical biodiversity (synergistic interactions between climatic changes and human land use) remain understudied. Key concerns are that aridification could increase the accessibility of previously non-arable or remote lands, elevate fire impacts and exace...

This paper examines the central hypothesis of the influential Malthusian theory, according to which improvements in the technological environment during the pre-industrial era had generated only temporary gains in income per capita, eventually leading to a larger, but not significantly richer, population. Exploiting exogenous sources of cross-country variations in land productivity and the leve...

The State of California seeks to induce per capita reductions in regional greenhouse gas (GHG) emissions from transportation by setting modeling targets for regional transportation and land use plans. Key to the success of SB 375 are accurate, valid models which are capable of forecasting the effects of transportation and land use policies on future greenhouse gas emissions. Current models are ...

This research suggests that favorable geographical conditions, that were inherently associated with inequality in the distribution of land ownership, adversely affected the implementation of human capital promoting institutions (e.g., public schooling and child labor regulations), and thus the pace and the nature of the transition from an agricultural to an industrial economy, contributing to t...