Claim · model-written summary
The authors consider the decrease in weed density to be due to increased cultivation and pest control techniques.
Verbatim
e0“the total weed density had decreased at a significant level during the last 31 years”
e1“It is considered that this decrease was due to the increase in cultivation and pest control techniques”
Title
Changes of weed flora in cereal fields over the last 31 years in Van, Turkey
Reyyan Yergin Özkan; Işik Tepe Pakistan Journal of Botany 2020. doi:10.30848/pjb2020-6(41)
Other claims from this paper (12)
- Observation In the 2017 survey of cereal fields, 71 weed species belonging to 23 plant families were identified.
- Observation In the 1986 survey, 84 weed species belonging to 24 plant families were identified.
- Observation Average weed density in 2017 was 41.8 per square meter.
- Observation Average weed density in 1986 was 82.8 per square meter.
- Observation The Similarity Index between the two surveys was 0.58 in terms of weeds.
- Observation Roughfruit corn bedstraw, tuberous cranesbill and rye were the most intensive weed species in 1986.
- Observation Narrowleaf knotweed, goatgrass and summer pheasant's eye were the densest species in the 2017 survey.
- Observation Field bindweed had a frequency of occurrence of 21.3% and was among the most common weeds in 2017.
- Observation Yellowweed had a frequency of occurrence of 19.5% and was among the most common weeds in 2017.
- Observation Field bindweed was the most common weed type in both the 1986 and 2017 surveys.
- Observation Total weed density decreased significantly over the 31 years between the surveys.
- Observation The density of several weeds, such as yellowweed, increased significantly between the surveys.
Rhizophora