Investigating the Spatial Relationship of Black-grass (Alopecurus myosuroides Huds.) with Soil Characteristics in Wheat Field Using Geostatistical Relationships

Document Type : Research Paper

Authors

1 Agronomy Department, Agriculture Faculty, University of Zabol

2 Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Iran

3 Agriculture Faculty, University of Shahroud

10.22034/saps.2023.58659.3123

Abstract

Background and Objective: The aim of this research was to investigate the spatial relationship between physical and chemical properties of soil and wheat yield in the conditions of competition with weeds in Isfahan weather conditions.
Materials and Methods: In the crop year 2019-2020, field experiment was conducted in the form of a grid system with a distance of 2 x 2 meters. At each grid point, soil characteristics, grain yield of wheat and weed density were measured. The spatial distribution of the obtained data was analyzed using the geostatistical technique.
Results: The grain yield has a strong spatial correlation with nitrogen, phosphorus, potassium, pH, and silt at the rates of 83.9, 78.3, 79.0, 80.1 and 81.7, respectively were in the range of 2.3, 3.2, 3.2, 3.7 and 4.0 meters. The areas where the wheat yield was lower were often in accordance with the areas where the sand and EC were the highest. Alopecurus myosuroides had a strong spatial correlation with nitrogen and clay of soil, and moderate spatial correlation with soil sand; while this weed was found in soils with low amount of phosphor, potassium, pH and silt. Spatial correspondence between weed density and reverse grain yield was 60.7% in the effect range of 4.2 meters.
Conclusion: The characteristics of the soil and the weed population in the field change from one place to another, and these variations can cause patchy and uneven distribution of yield in the field. Grain yield showed the highest spatial correlation with soil nitrogen.

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION

Articles in Press, Accepted Manuscript
Available Online from 19 January 2025

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