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| Munkholm, L.J.; Schjønning, P.; Rasmussen, K.J.; Tanderup, K.. |
| Despite more than 30 years of research and practical experience the interest in shallow tillage and especially direct drilling has remained low in Scandinavia. Excessive compaction of the topsoil layer is one of the major problems encountered when adapting shallow tillage and direct drilling in particular. The purpose of this study was to evaluate temporal and spatial effects of two different direct drilling techniques on bulk density and penetration resistance in the near seed environment. A sandy loam growing small grain cereals was followed during the first 3 years after conversion from conventional tillage to direct drilling to reveal short-term changes in soil structure. A field experiment with four blocks was conducted in 1999–2001 where a... |
| Tipo: Journal paper |
Palavras-chave: Soil quality Production systems Soil tillage Cereals; Pulses and oilseeds. |
| Ano: 2003 |
URL: http://orgprints.org/729/1/dirdrill2003.pdf |
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| Schjønning, P.; Rasmussen, K.J.. |
| Direct drilling has often been reported to increase density and strength and to affect pore continuity and tortuosity of the upper soil layers. In this study these aspects were studied for three texturally differing soils 4–6 years after initiation of continuous trials with direct drilling and mouldboard ploughing. The soils studied were a coarse sandy soil (Korntved, 5% clay), a sandy loam (Ballum, 8% clay) and a silty loam (Højer, 19% clay). The crop rotation at Korntved was spring barley and winter rye while at Ballum and Højer it was spring barley and winter wheat. Both crops were grown every year. All fields had been mouldboard ploughed for decades prior to the trial period. The ploughed treatment (PL) was imposed in the autumn and the seedbed... |
| Tipo: Journal paper |
Palavras-chave: Soil quality Production systems Cereals; Pulses and oilseeds. |
| Ano: 2000 |
URL: http://orgprints.org/728/1/dirdrill2000.pdf |
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