(see also on IPI Twitter and Facebook):

Iowa State: Research Proves Moist K Soil Test Results More Reliable
October 10, 2013. CropLife.

Farmers Dig into Soil Quality.
Schiermeier, Q. 2013. Nature 502:607.

Sustainable Management: Recycle Waste for Nourishing Soils
Lehmann, J. 2013. Nature 504:33.

From Fertiliser to Zyklon B: 100 Years of the Scientific Discovery that brought Life and Death
Read about Haber Bosch process: The Guardian, 3 November 2013.

The Social, Economic and Environmental Value of Agricultural Productivity in the EU
2013. The Humboldt Forum for Food an Agriculture (HFFA).

Effects of N and K Fertilizers on Durum Wheat Quality in Different Environments
Olfa Daaloul Bouacha, Sadok Nouaigui, and Salah Rezgui. ScienceDirect: J. of Cereal Science 59(1):9-14.

How do Phosphorus, Potassium and Sulphur Affect Plant Growth and Biological Nitrogen Fixation in Crop and Pasture Legumes? A Meta-Analysis
Guillermo A. Divito, and Victor O. Sadras. ScienceDirect: Field Crops Research 156:161-171.

Project Tests New Ways to Deliver Climate Messages to Farmers’ Cell Phones
Surabhi Mittal, and Dharini Parthasarathy. 2013. CGIAR.

App Could Transform Farming and Address Food Shortages
2013. BBC News.