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Table 2 Pinyon −juniper woodland mean and standard deviation (SD) of fuel load (kg ha−1) by fuel type pre treatment and two years post treatment

From: Fuel bed response to vegetation treatments in juniper-invaded sagebrush steppe

Fuel type Phase Control (C) Prescribed burn treatment (Rx) Mechanical treatment (M)
Pre treatment Post treatment Change Pre treatment Post treatment Change C vs. Rx Pre treatment Post treatment Change C vs. M Rx vs. M
n Mean SD n Mean SD % n Mean SD n Mean SD % P value n Mean SD n Mean SD % P value P value
Live herbaceous 1 9 288 134 9 549 253 90 10 218 134 10 772 296 254 0.032 6 214 73 6 525 285 146 0.857 0.149
2 9 200 163 9 285 149 43 12 142 54 12 637 431 350 0.004 14 111 71 14 352 211 218 0.303 0.074
3 13 41 32 13 41 21 0 11 8 13 11 153 175 1831 0.007 10 48 38 10 134 83 181 0.153 0.359
Shrub biomass 1 9 5449 5238 12 3467 2546 −36 10 5171 3645 13 2950 1514 −43 0.013 6 4845 1638 10 4456 1404 −8 0.645 0.004
2 9 2764 1830 16 2179 1351 −21 12 2950 1514 26 504 1074 −83 0.024 14 3244 2385 26 3851 2743 19 0.388 < 0.001
3 13 507 485 18 567 664 12 11 173 326 16 133 194 −23 0.960 10 773 714 13 1279 1537 66 0.965 0.888
Shrub 1-h 1 9 1527 858 12 1420 827 −7 10 1747 1073 13 1184 584 −32 < 0.001 6 1888 629 10 1651 444 −13 0.990 0.001
2 9 1130 845 16 757 453 −33 12 1184 584 26 209 374 −82 0.025 14 1093 665 26 1307 816 20 0.268 < 0.001
3 13 193 167 18 193 201 0 11 72 117 16 55 76 −24 1.000 10 310 265 13 472 530 52 0.661 0.721
Shrub 10-h 1 9 1152 1137 12 753 695 −35 10 1211 958 13 777 266 −36 0.061 6 1164 529 10 1876 1458 61 0.201 0.002
2 9 616 568 16 577 359 −6 12 777 266 26 282 565 −64 0.016 14 605 325 26 1207 1262 99 0.431 < 0.001
3 13 103 92 18 146 174 42 11 42 76 16 60 80 43 0.997 10 230 267 13 399 553 74 0.999 0.994
DWD 10-h 1 12 534 390 12 552 307 3 13 983 702 13 887 306 −10 0.197 10 593 360 10 1238 772 109 0.007 0.318
2 16 591 328 16 622 255 5 26 996 663 26 695 226 −30 0.978 26 865 613 26 1716 981 98 < 0.001 < 0.001
3 18 565 287 18 982 925 74 16 903 548 16 1063 686 18 0.999 13 896 219 13 3758 2839 320 < 0.001 < 0.001
DWD 100-h 1 12 1002 719 12 1011 581 1 13 1747 1194 13 1391 475 −20 0.808 10 1235 994 10 1897 944 54 0.011 0.048
2 16 958 575 16 772 437 −19 26 1217 559 26 1493 800 23 0.297 26 1531 696 26 3690 1883 141 < 0.001 < 0.001
3 18 956 773 18 1103 1265 15 16 979 833 16 2102 784 115 0.488 13 1620 758 13 7219 4479 346 < 0.001 < 0.001
  1. Change is reported in percentage (%) and calculated as the pre-treatment value minus the post-treatment value, divided by the pre-treatment value; n indicates the number of samples used in the calculations. Treatments include a control (C), prescribed burning (Rx), and mechanical cut-and-leave treatment (M). P values from analysis of variance testing for treatment effects two years post treatment are reported. P values < 0.05 are in boldface