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Table 3 Changes in the mass fraction of carbon (C) and nutrients in manure stored during 6 months under three different management practices. Averages are followed by their standard deviation except for the initial values. SED: standard error of the differences

From: Carbon and nutrient losses during manure storage under traditional and improved practices in smallholder crop-livestock systems—evidence from Kenya

Days of storage Mass fraction (g kg−1) C:N C:P
C N P K Min N
Pit open air
 0 358   14.3   5.0   10.2   0.78   25 72
 40 378 ±20 16.4 ±0.2 5.1 ±0.6 1.9 ±0.5 0.25 ±0.05 23 73
 73 157 ±98 5.9 ±5.6 3.2 ±1.4 2.8 ±0.5 0.16 ±0.03 27 49
 102 144 ±37 4.9 ±1.1 3.2 ±1.1 2.8 ±0.3 0.23 ±0.35 29 45
 182 198 ±27 5.7 ±0.9 3.4 ±1.1 2.6 ±0.5 0.02 ±0.00 35 57
Heap open air
 0 358   14.3   5.0   10.2   0.78   25 72
 40 347 ±62 18.7 ±4.2 6.9 ±2.2 4.3 ±0.9 0.16 ±0.03 19 50
 73 249 ±12 12.1 ±4.4 5.0 ±0.8 4.0 ±0.0 0.25 ±0.05 20 50
 102 170 ±8 8.8 ±2.5 4.1 ±0.4 3.6 ±0.1 0.07 ±0.09 19 41
 182 198 ±34 11.2 ±2.0 4.9 ±0.4 3.3 ±0.4 0.29 ±0.24 18 40
Heap under roof
 0 358   14.3   5.0   10.2   0.78   25 72
 40 346 ±30 18.5 ±3.7 7.1 ±0.6 10.7 ±0.7 1.16 ±0.82 19 49
 73 260 ±87 15.6 ±6.3 6.5 ±2.8 9.2 ±2.5 1.16 ±0.82 17 40
 102 194 ±40 10.4 ±2.4 4.0 ±0.6 7.9 ±1.0 0.31 ±0.25 19 48
 182 110 ±8 14.2 ±3.6 4.7 ±1.2 8.1 ±1.5 0.49 ±0.17 8 23
SED (days of storage) 20   1.5   0.6   0.4   0.16   2.3 4.4
SED (storage practice) 15   1.2   0.4   0.3   0.12   1.8 3.4