14 Sep 2017

Long-term Research Documents Importance of Balanced Plant Nutrition

The Research with Impact series highlights case study examples of solution-driven research supported by IPNI.

07 Jun 2017

4R CCA Nutrient Management Specialist Study Guide

The International Certified Crop Adviser (ICCA) Program developed the 4R NMS (4R Nutri­ent Management Specialist) Certification to meet the growing demand for qualified advisers with focused knowledge and skills in nutrient management. This study guide was developed by IPNI to support the first edit

24 Apr 2016

4R Decision-Making Guides

When decisions are made regarding the 4R’s there are many benefits, including better crop growth, decreased nutrient leakage to the environment, and the protection of natural areas and wildlife.

31 Mar 2016

Soil Test Levels in North America

The 2015 Summary Update provides interpretive analysis of the results of the most recent survey of soil test levels for North America.

02 Dec 2015

Better Crops: The Fertility of North American Soils: A Preliminary Look at 2015 Results

The 2015 soil test summary is the fourth in a series of summaries dating back to 2001, 2005, and 2010. For the first time, trends in relative frequencies in soil test levels are being examined. Preliminary results for Corn Belt states are showing a reduction in percentages of samples testing high

02 Dec 2015

Better Crops: Phosphorus Management for Potatoes

Economic rates of P fertilization are higher for potatoes than for many other crops due to shallow roots and sparse root hairs.

Tom Bruulsema in Ridgetown, Ontario.
30 Jun 2015

IPNI Appoints Phosphorus Program Director

June 26, 2015 – Peachtree Corners, GA, USA – The International Plant Nutrition Institute (IPNI) has appointed Dr. Tom Bruulsema as its Phosphorus Program Director. “This change in focus reflects a need to devote greater attention to phosphorus, its role in global food security, and its potential f

06 Mar 2015

Plant Nutrition Today

This quarterly publication features current issues in plant nutrition for North America.

16 Jan 2015

NuGIS: Nutrient Use Geographic Information System

The Nutrient Use Geographic Information System (NuGIS) integrates multiple tabular and spatial datasets to create county-level estimates of nutrients applied to the soil in fertilizer and livestock manure, and nutrients removed by harvested agricultural crops.

14 Jan 2015


IPNI's Nutri-Facts series focuses on each essential plant nutrient - presenting key facts concerning their use.

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