Weed survey in the arable fields in Latvia | Sējumu nezāļainības pētījumi Latvijā
2014
Mintale, Z., Latvian Plant Protection Research Centre, Riga (Latvia) | Vanaga, I., Latvian Plant Protection Research Centre, Riga (Latvia) | Dudele, I., Latvian Plant Protection Research Centre, Riga (Latvia)
Weed surveys have been carried out in Latvia for more than sixty years. A new weed survey project started in spring, 2013. The main task of the project was weed mapping. Scientists from four scientific institutes have been contributing to the project. The farms for the weed survey were selected using the nested sampling grid by dividing the territory into squares with an area of 10 km by 10 km. Twelve to fifteen farms were selected in each of the four historical regions of Latvia: Vidzeme, Latgale, Zemgale and Kurzeme. The information about weed distribution and abundance was collected from 306 fields in 51 farms using the conventional farming systems during the survey in 2013. The most common crops grown in the fields visited during the survey were winter wheat (28% of all the fields), spring barley (16%), spring wheat (16%), spring oilseed rape (9%) and spring oat (7%).
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