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Detecting effects of within-field heterogeneity on yield structure and crude protein content of winter wheat using sensor data and GIS


, : Detecting effects of within-field heterogeneity on yield structure and crude protein content of winter wheat using sensor data and GIS. Journal of Plant Diseases and Protection (Sp. Iss. 21): 155-160

Experiments were conducted on two arable fields in 2006 to study the influences of within-field soil variation and weed distribution on yield and crude protein content of winter wheat. In both fields, data on apparent electrical conductivity of soil and data on yield were assessed via sensors. On field 1, data on weed distribution, structure of yield and crude protein content were mapped at grain harvest and merged using GIS. Values of soil and weeds were grouped into soil- and weed classes with defined ranges. on field 2, structure of yield and crude protein content were assessed within weed patches with different density levels at time of harvest. Structure of yield and yield were negatively affected by high density weed patches and low soil classes. However, crude protein content was significantly higher in areas with high weed density and areas of the low soil class. Weed infestation in the higher soil classes reduced yield significantly. In the lower soil classes, no significant weed competition effects were observed.

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