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Figure 1

From: Optimising storage conditions and processing of sheep urine for nitrogen cycle and gaseous emission measurements from urine patches

Figure 1

Urine N concentrations of unfiltered (a–c) and filtered (d–f) samples stored at room temperature (a and d), in a refrigerator (8 °C; b and e) or in a freezer (-20 °C; c and f) for up to 49 days. Error bars are ± standard errors of the means (SEMs; n = 3), average confidence intervals (CIs) for the full fixed model (filtering*temperature*time) were as follows: total N mean ± 0.170; NH4+-N mean ± 1.05; NO3–N mean ± 1.28; total organic N mean ± 0.192.

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