James S. Gerber

TL;DR: In this article, the authors quantify changes in the global spatial efficiency of cropland N use by calculating historical trade-off frontiers relating N inputs to possible N yield assuming efficient allocation.

TL;DR: A wave energy converter system comprises two floats, one generally flat and heaving up and down in phase with passing surface waves on a body of water, and the other being elongated and moving out of phase with the passing waves Preferably, the first float is annular with a central vertical opening therethrough and the elongated float, with a weighted bottom end, extends vertically through the central opening of the firstfloat.

TL;DR: In this article, a Bayesian framework integrating empirical estimates and gridded global crop models on new maps of the relative difference between attainable rainfed and irrigated yield (ΔY) was developed for wheat and maize at global scale, with large spatial differences driven more by patterns of precipitation than that of evaporative demand.

TL;DR: In this paper, the authors estimate P limitation in three major cereals worldwide for the year 2000 by combining information on soil P distribution in croplands and a generic crop model, while accounting for the nature of soil-plant P transport.

TL;DR: A minor error in the mapping program used to generate Fig. 1 incorrectly displayed reduced yield gap estimates across a few areas; this was most apparent in the Sahel region of Africa.