Comparision the effectiveness of sampling methods, the shape and size of quadrat in estimating weed population of corn fields under different irrigation systems
Department of Agriculture and Plant Breeding, Faculty of Agriculture, University of Tehran, Karaj, Iran
10.22059/ijfcs.2024.371039.655057
Abstract
In order to investigate the effectiveness of random, zigzag and diagonal sampling methods with 28, 29 and 28 sampling units respectively, the shape and the size of the square in estimating the weed population of corn fields under drip, Furrow and sprinkler irrigation, a research was conducted in 2020 in six corn fields. In order to estimate the accuracy of the sampling methods, first, the studied area was gridded with the standard grid sampling method of 5 m x 5 m and at the using a square quadrat (100 x 100 cm), The data related to the density and diversity of weeds by species were recorded at the four-leaf stage of corn. The results showed that one square meter quadrats had a better estimate of species diversity and weed population density in corn fields under three irrigation systems. But when only weed density is considered, the use of a rectangular square of 0.25 m2 was able to estimate weed density with acceptable accuracy. the sampling methods showed different estimates of the population density of weeds, so that the diagonal sampling method in the drip irrigation system and the sampling methods Zigzag and random in sprinkler and furrow irrigation systems showed less error compared to grid sampling method. Meanwhile, in the investigation of single weed species, the diagonal systematic sampling method in all three irrigation systems showed the least error in the accuracy of the density estimation of the studied species compared to the grid method.
Ghafari, M., Oveisi, M., & Alizadeh, H. (2024). Comparision the effectiveness of sampling methods, the shape and size of quadrat in estimating weed population of corn fields under different irrigation systems. Iranian Journal of Field Crop Science, 55(3), -. doi: 10.22059/ijfcs.2024.371039.655057
MLA
Mahdi Ghafari; Mostafa Oveisi; Hassan Alizadeh. "Comparision the effectiveness of sampling methods, the shape and size of quadrat in estimating weed population of corn fields under different irrigation systems", Iranian Journal of Field Crop Science, 55, 3, 2024, -. doi: 10.22059/ijfcs.2024.371039.655057
HARVARD
Ghafari, M., Oveisi, M., Alizadeh, H. (2024). 'Comparision the effectiveness of sampling methods, the shape and size of quadrat in estimating weed population of corn fields under different irrigation systems', Iranian Journal of Field Crop Science, 55(3), pp. -. doi: 10.22059/ijfcs.2024.371039.655057
VANCOUVER
Ghafari, M., Oveisi, M., Alizadeh, H. Comparision the effectiveness of sampling methods, the shape and size of quadrat in estimating weed population of corn fields under different irrigation systems. Iranian Journal of Field Crop Science, 2024; 55(3): -. doi: 10.22059/ijfcs.2024.371039.655057
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