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477-484 K. Sepp, J. Kanger and M. Särekanno
Influence of soil tillage methods on the weediness and yields of spring wheat, spring barley and field pea in organic crop rotation
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Influence of soil tillage methods on the weediness and yields of spring wheat, spring barley and field pea in organic crop rotation

K. Sepp, J. Kanger and M. Särekanno

Department of Agricultural Research and Monitoring, Agricultural Research Centre,Teaduse 4/6, EE75501, Saku, Estonia; e-mail: karli.sepp@pmk.agri.ee

Abstract:

The influence of different soil tillage methods – (1) reduced tillage without soil inversion, 8–10 cm (RT), (2) ploughing only 18–25 cm (P) and (3) stubble cultivation, 8–10 cm and ploughing, 18–25 cm (SC+P) on the weediness and yield of grain crops are analysed in this paper. The studies were made in an organic crop rotation: spring barley with undersown red clover/timothy – red clover/timothy – red clover/timothy – spring wheat – field pea, which was set up at Kuusiku Testing Centre in 2003. There were only a few wandering perennials (WP) on the experimental plots of SC+P and grain yields of spring wheat, spring barley and pea were highest. The WP spread quickly on the P plots and the grain yield of spring wheat and pea were lowest. The weediness of WP in the case of RT was lower than with P, but higher than SC+P. Conversely, the number of annual weeds in the summer wheat and pea was highest in SC+P. The grain yield of spring barley was lowest using RT. Key words: annual weeds, organic farming, ploughing, reduced tillage, stubble cultivation, wandering perennial weedsINTRODUCTION

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