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Country guidelines and technical specifications for global soil nutrient and nutrient budget maps

GSNmap: Phase 1









FAO. 2022. Country guidelines and technical specifications for global soil nutrient and nutrient budget maps  GSNmap: Phase 1. Rome.



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    Book (stand-alone)
    Soil and plant testing and analysis. Report of an Expert Consultation, Rome, 13-17 June 1977
    FAO Soils Bulletin 38/1
    1980
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    Methods for evaluating nutrient status in order to obtain better plant growth and increased yield are constantly being developed and improved. New analytical techniques and procedures for soil and plant analysis have been invented and tested in many countries and laboratories. There have been innovations in data processing leading to preparation of more refined and specific fertilizer recommendations. The purpose of the Consultation was: i. to review advances in a) methodologies for soil and plant chemical analysis, and b) interpretation of the results obtained and the preparation of fertilizer recommendations based on these results. ii. to identify progress made and areas requiring further attention with regard to the organization of soil testing services in general and, in particular, in developing countries.
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    Booklet
    Soil nutrient budget
    Global, regional and country trends 1961–2018
    2021
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    The FAOSTAT domain “Soil nutrient budget” disseminates nutrient flows in a given country and year. The soil nutrient budget can give an indication of nutrient use efficiency, as it can help quantify excess nitrogen leading to environmental risks, for instance, GHG emissions or pollution from volatilization and leaching/runoff. It can also signal soil nutrient deficits that limit crop production. This analytical brief focuses on the nutrient nitrogen. Nutrient budgets are presented both as total nutrient flows and per area of cropland. Global and regional trends are analyzed along with highlights of the most important contributors to the overall budget and how these main contributors have changed over time. Lastly, the top 10 countries for the soil nutrient budget per unit area and bottom 10 countries for the soil nutrient budget total are presented.
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    Book (stand-alone)
    Soil and plant testing and analysis as a basis of fertilizer recommendations
    FAO Soils Bulletin 38/2
    1980
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    General principles of plant nutrition don't furnish the concrete information, necessary for practical treatments in a given situation. Thus, the questions arise which parameters must be considered an how can they be determined. This leads to consider the concepts of nutrients diagnosis, as well as the methodology and the corresponding equipment and instrumentation, for putting it into practice. The question may arise whether plant or soil analysis should be used for diagnosis crop nutrient requ irements and making fertilizer recommendations.Both methods may be complementary, not competitive and the laboratories should be in the possibility to carry out both types analysis. It is recommendable to start soil analysis prior to plant testing.There are many possibilities and methods for testing soil chemical and nutrient properties. It is indeed highly recommended to agree on a minimum of uniformity of methodology.

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