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Site-Specific Fertilizing

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Precision in Crop Farming

Abstract

Fertilisation aims at providing soils with nutrients for high crop yields without adversely affecting the environment. Since in most cases the properties of soils as well as of crops vary within individual fields, site-specific fertilization is needed. The challenge is to find sensing methods that provide suitable signals for the site-specific control of fertilizer application. Feasible approaches to meet this challenge are based on

  • recording the yield of previous crops and the nutrient removal derived from it

  • electrochemical indication of nutrients in soils by ion-selective electrodes

  • sensing the nutrients either in soils or in crops via optical reflectance.

The best choice depends on a variety of factors such as e.g. nutrient type, properties of soils, properties of crops and climate. The last listed method – sensing via optical reflectance – can be used in a proximal mode from farm machines or also in a remote mode from satellites provided clouds do not obstruct the radiation. Its use for in-season nitrogen application with proximal sensing from farm machines is becoming a leading technology.

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  1. Department of Agricultural Systems Engineering, University of Kiel, 24098, Kiel, Germany

    Hermann J. Heege

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    Hermann J. Heege

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Heege, H.J. (2013). Site-Specific Fertilizing. In: Heege, H. (eds) Precision in Crop Farming. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6760-7_9

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