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Long-term influence of manure and mineral nitrogen applications on plant and soil 15N and 13C values from the Broadbalk Wheat Experiment

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Figure

Table 1. Effects of organic manure and mineral fertiliserapplication on soil d13C and d15N values in 1966 and 2000
Figure 2. Relationship between mean of strawand N treatments. Data pooled for each time period ineach treatment
Figure 3. Relationship between mean of straw and graintreatments) and cumulative rainfall (March to end of June) in the periods from 1968–1979(cv
Figure 5. Themineral N supply (kg N ha d15N and d13C values of straw for two time periods under different rates of�1) (black shapes: 1968–1979; open shapes: 1996–2003).

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