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Abstract Root growth of winter barley was studied on 2 Belgian silt loam soils after subsoiling to 60 cm depth. In the first field (well-drained) rooting depth increased significantly after removal… (More)
Root growth and yield of sugar-beets were studied on two Belgian silt loam soils and one alluvial clay soil after subsoiling to a depth of 60 cm. The removal of the plough sole layer, characterized… (More)
An evaluation of the N release by soil organic matter can be obtained by measurements of the course of soil mineral nitrogen on uncropped objects. This N mineralization was studied during several… (More)
Abstract On a silt loam soil, the reaction of crop growth after subsoiling a plough pan was studied during 4 successive years. The mean yield increase for cereals and sugar beets varied between 5 and… (More)
Abstract The latent mineral‐N residue is the smallest required inorganic nitrogen quantity, at the moment that the maximum N‐amount is present in the crop, to obtain optimum yields. These latent… (More)