Research Article
N, P, and K Budgets and Changes in Selected Topsoil Nutrients over 10 Years in a Long-Term Experiment with Conventional and Organic Crop Rotations
Table 4
Harvested ley yields, clover contentand concentrations of N, P, and K.
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1The proportion of legumes was determined visually before harvest. 2Standard error of means. Yield data were averaged for the years 2001–2010, whereas data on nutrient concentrations were averaged for the years 2006–2010. 3Pairwise comparisons of yields (sum of two cuts) using LSD at the 5% level, where yields of the same crop not differing significantly between systems are denoted the same letter. 4Pairwise comparisons of clover content separate for each cut, where clover contents of the first cut not differing significantly between systems are denoted the same letter, whereas clover contents of the second cut not differing significantly between systems are denoted the same capital letter. 5Pairwise comparisons of nutrient concentrations separate for each cut, where concentrations of the first cut not differing significantly between systems are denoted the same letter, whereas concentrations of the second cut not differing significantly between systems are denoted the same capital letter. 6LSD values at 5% level for the total yields (sum of two cuts) and that for clover content and nutrient concentrations of first cut. 7LSD values at 5% level for clover content and nutrient concentrations of the second cut. |