Incorporation of Organic Matter Into the A Horizon of Some Wisconsin Soils Under Native VegetationUniversity of Wisconsin--Madison, 1963 - 412 pages |
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Page 73
... percent needles , 5 percent cones and 3 percent twigs . The weight of the L ( upper litter ) and F ( fermenting ) horizons or total " litter " accumulated on the forest floor averaged 10,700 ( range 7200 12,400 ) pounds per acre and ...
... percent needles , 5 percent cones and 3 percent twigs . The weight of the L ( upper litter ) and F ( fermenting ) horizons or total " litter " accumulated on the forest floor averaged 10,700 ( range 7200 12,400 ) pounds per acre and ...
Page 90
... percent and of potassium , 80 per- cent . Only a 10 percent decrease in magnesium content was indicated whereas the percent nitrogen , calcium and ash actually increased during the spring and summer . The maximum relative increases in ...
... percent and of potassium , 80 per- cent . Only a 10 percent decrease in magnesium content was indicated whereas the percent nitrogen , calcium and ash actually increased during the spring and summer . The maximum relative increases in ...
Page 158
... percent of the 245 cradle - knolls sampled and the south sector the remaining 49 percent . A comparison of east and west sectors showed that 63 percent of the cradle - knolls had pit to mound directions toward the east and only 37 percent ...
... percent of the 245 cradle - knolls sampled and the south sector the remaining 49 percent . A comparison of east and west sectors showed that 63 percent of the cradle - knolls had pit to mound directions toward the east and only 37 percent ...
Contents
REVIEW OF LITERATURE | 3 |
Definitions of Some Organic Horizons of Forest Soils | 6 |
Seasonal Changes in Dry Weight of Fallen Leaves | 11 |
30 other sections not shown
Common terms and phrases
A₁ A1 horizon Abrahams woods ash litter average big bluestem Bocock burrows of Lumbricus centimeters clipped coarse mull cradle-knolls Crossection decomposition diameter earthworm casts earthworm populations earthworms Factor feet forest litter forest soil frozen soil gains Gley soil humus humus layer ice layers inches incorporation of organic Indian grass leaf litter Lumbricus terrestris Madison maple material Menominee County middens mineral soil mulch needle ice nitrogen nitrogen content Noe woods Norrie Hill November October organic matter percent period petioles pine pit to mound plant Podzolic soils point frame pounds per acre prairie plots prairie sites prairie vegetation quadrats quarter method roots sampling point seed stalks showed silt loam soils slope small scale relief Soil Depth soil genesis soil genesis plots soil horizon soil nitrogen soil samples soil surface Subsoil Subsoil thick tons per acre total nitrogen transect trees twigs undisturbed plot University of Wisconsin vertical Wisconsin Arboretum worms