Productivity maps overview
Productivity maps are derived from crop production history and remote sensing, and is used to determine variability and make site specific management decisions.
Variability is analyzed through evaluation of Normalized Differential Vegetation Index in past crop seasons, given it's high correlation with yields in key dates. The result is a Productivity Map, which divides the field in classes, from very low to very high productivity polygons. In this section //put link, analyzes in more detail how Productivity Maps are generated.
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Why is it important to recognize variability
//put picture of field w/variability Two areas in a field are different zones if the same crop, with the same treatment, present marked differences in their yields. Thus, environmental variability comprises different factors that affect the growth and yield of crops. These include for instance, soil types, position in the landscape which affects water flows, or climate. This chart shows how different crops have varying yields according to the type of zones. //put figure.
The following graphics also summarizes the importance of recognizing variability and managing it.
this section //put link, analyzes in more detail productivity maps applications, and how they are used to characterize management zones and make management decisions
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