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| MANAGING CROP NITROGEN FOR WEATHER SYMPOSIUM PROCEEDINGS AVAILABLE FROM IPNI The contents of a new publication titled Managing Crop Nitrogen for Weather, based on the proceedings of a symposium at the 2006 meeting of the Soil Science Society of America (SSSA), provide details of experimental data and experiences of those engaged in efforts to improve prediction of crop nitrogen needs in response to weather conditions. Read Full StoryGreenhouse Gas Emissions from Cropping Systems and the Influence of Fertilizer Management  Scientific staff of the International Plant Nutrition Institute (IPNI) have prepared a literature review to extend information that will lead to a better understanding of fertilizer N management practices that minimize global warming potential. Download a copy |
Cotton Response to Combinations of Nitrogen and Potassium  Cotton continues to be one of the major row crops in Mississippi Delta Region of Arkansas. Nitrogen and K fertilization of cotton in Arkansas is based on preplant soil test NO3-N and K levels and petiole NO3-N and K concentrations between first bloom and boll opening. This diagnostic approach is based on field research in late 70's and early 80's and enabled many Arkansas and other mid-south growers to produce high cotton yields for many years. However, cotton production practices have dramatically changed during the past two decades. more on this research |
Impact of Rising Nitrogen Prices  Natural gas represents a major portion of the cost of ammonia production, and concern continues about effects on nitrogen (N) fertilizer prices. Impact of Rising N PricesManaging Nitrogen to Protect Water  Nitrogen fertilization is essential to crop production. Farmers can’t grow enough food to meet ever increasing world demands without it. The good news is that with proper management of available N fertilizer sources, farmers can achieve their yield goals and sustain water quality at the same time. Read this Enviro-BriefUSE OF YIELD GOALS FOR PROVIDING N RATE SUGGESTIONS: GENERAL CONCEPT Recent studies in the North Central region have shown a poor relationship between optimum yield of individual sites and optimum fertilizer N rate. The outcome has been the development of fertilizer recommendation approaches that do not consider site yield goal. This causes one to ponder how so many recommendation programs utilizing yield goal were developed in the first place and have continued in use for more than 40 years. It appears to be an appropriate time to review the general concept of use of yield goals in N recommendations. Such a review is the primary objective of this paper, presented by Paul Fixen at the 2006 Northcentral Extension-Industry Soil Fertility Conference with a secondary objective of relating the traditional concept to the recent studies suggesting a very limited role for yield goal in predicting N fertilizer need. Read Full StoryFrom the new series...  WILL BIOTECHNOLOGY REPLACE NITROGEN FERTILIZER? Read Full StoryNew Nitrogen Fertilizer Products and Technologies Papers from the session New N Fertilizer Products and Technologies chaired by IPNI at the 2007 International Nitrogen Conference held in Costa do Sauipe, Brazil October 01 - 04, 2007. Click here to read the papers |
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