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| Nielsen, Dr. Niels Erik; Thomsen, Senior scientist Ingrid Kaag; Berntsen, Scientist Jørgen. |
| It appears that the growth of barley seedlings during spring is restricted by moderate internal deficiency of phosphorus (P) and potassium (K) in most cases. This agrees with the well-known increases of growth and grain yields if P and K fertilizer placement is used in spring barley growing. It is also evident from our earlier work that barley cultivars may differ in the P acquisition from soil (Gahoonia and Nielsen, 2004; Gahoonia and Nielsen, 2003). The existence of cereal varieties differing in the efficiency in P uptake from soil suggests that more nutrient efficient varieties can be identified among the existing varieties. The aim of this work was to study differences between selected barley cultivars in their soil-P and soil-K acquisition to... |
| Tipo: Working paper |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2003 |
URL: http://orgprints.org/1453/1/BAR%2DOF%2DNEN%2DO3%2Dpaper1.doc |
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| Müller, Dr. Torsten; Magid, Dr. Jakob; Jensen, Dr. Lars Stoumann; Nielsen, Dr. Niels Erik; Thorup-Kristensen, Dr. Kristian. |
| During the last years, an increasing number of stockless farms in Europe converted to organic farming practice without re-establishing a livestock. Due to the lack of animal manure as a nutrient input, the relocation and the external input of nutrients is limited in those organic cropping systems. The introduction of a one-year green manure fallow in a 4-year crop rotation, including clover-grass mixtures as a green manure crop is the classical strategy to solve at least some of the problems related to the missing livestock. The development of new crop rotations, including an extended use of catch crops and annual green manure (legumes) may be another possibility avoiding the economical loss during the fallow year. Modelling of the C and N turnover in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Production systems; Crop combinations and interactions; Vegetables; Soil biology. |
| Ano: 2002 |
URL: http://orgprints.org/127/1/0830.pdf |
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