The effect of agrotechnical methods on weed seedbank
2000
Lauringson, E. | Kuill, T. | Talgre, L. | Vipper, H. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Field Crop Husbandry)
The effect of tillage methods, tillage depths, and chemical weed control on weed seedbank in the soil was studied in three crop rotations. In the final year of the experiment, 1997, the proportion of weed seedbank in the soil was primarily assessed on two levels - with and without using chemical weed control. The uninterrupted use of chemical weed control reduced the weed seedbank in the ploughed layer by an average of 30...53.4 per cent as compared with no use of chemicals. Intensive potato cultivation increased weed seedbank in the soil by approximately 75 per cent by the end of the experiment as compared with its beginning. The reasons for this increase in weed seedbank were the application of manure abundant in weed seed and the occurrence in potato of sparsely distributed tall annual weed species with high seed crop. Replacing ploughing with loosening yielded an increase in weed seedbank (by about 6...26 per cent depending on tillage depth)
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