thin section in bt showing neo cutans
201

this section same as slide #201, but with xnicol
202

crumb structure of ah in profile, at dunlap observatory
203

blocky structure in the bt of the profile in slide #140
204

iron concretions in a douglas fir soil
205

blocky, angular structure in the b of slide #140 at dunlap observatory
206

winter and snow cover at the dunlap observatory
207

same location as slide #207, but in march as snow is melting
208

view of same location as slides # 207 and 208 showing litter after snow has gone
209

nodules of comptonia peregrina n-fixing
210

mycelium of phytophthora cinnamomi in w. australia
211

comptonia peregrina plant in plonski forest
212

nodules on roots of alnus glutinosa from dorset area
213

nodules from roots of alnus glutinosa in dorset area
214

cross-section of nodule on alnus glandulosa showing infected cortical cells
215

microsection of alnus nodule to show the infected cortical cells
216

microsection of the cortical cells of an alnus nodule
217

algal growth on soil surface which is fixing nitrogen
218

close-up of the l, h,, ah, bm horizons in a dystric brunisol at dorset
219

profile in a basal till (sandy loam) under mixed boreal forest
220

close-up of basal till
221

profile of an orthic gray brown luvisol
222

gray-brown luvisol
223

root channel just below bt, in ck
224

root in the bt of gray-brown luvisol profile
225

ah of the profile in slide 223
226

windthrow in a till (sandy loam) at dorset under white pine
227

profile of a eutric brunisol in lacustrine silt loam with ck
228

showing l, h, bm horizons of profile in slide #228
229

platy structure in silt loam
230

extracted portion of c to show laminations in silt loam, roots and gleying
231

root system of acer saccharum (sugar maple) in sandy loam till
232

surface view of ah (mull) in gray-brown luvisol
233

view of forestry soils class, sept. 1970
234

ablation (dump) till of loamy sand over a basal till of sandy loam, which is compacted
235

gray-wooded luvisol in truax township
236

close-up of h, ah-ae of gray-wooded luvisol
237

profile of a podsol in medium-coarse sand
238

general view of area 30 yrs after fire
239

podsol profile in dump loamy till
240

forest of poplar & w. spruce after fire
241

profile of weak podsol in fine sand over a silt loam
242

podsol profile in a deep medium/fine sand
243

bisequum of sandly loam/silty clay/silt loam
244

world wide distribution of phytophthora cinnamomi
245

disturbed podsol
246

jarrah forest (eucalyptus marginata) on laterite
248

young jarrah (eucalyptus marginata) in western australia
249

photo of zanthoraceae pressii
250

eucalyptus marginata killed by p. cinnamomi
251

dead eucalyptus marginata (jarrah) on coast in western australia
252

typical dieback in jarrah due to phytphthora cinnamomi
253

killed forest of jarrah from phytophthora cinnamomi
254

eucalyptus calophylla
255

nature reserve on coastal plain in western australia
256

mycelium of phytophthora cinnamomi
257

mycelium and sporangia of phytopphthora cinnamomi
258

oospore of phytophthora cinnamomi
259

plate cultivation of phytophthora cinnamomi from jarrah
260

blue lupin culture
261

culture of banksia grandis
262

pot trial of banksia grandis
263

slide listing types of diagnostic relationships
264

relationship between growth and nitrogen supply
265

changes in nutrient concentration
266

changes in nutrient concentration with plant size
267

seedling growth plotted against nitrogen concentration
268

growth of seedlings at three fertility levels
269

tabular data for the graphs shown in slide #269
270

suggested "objectives" in relation to fertility considerations
271

graph showing relationship between growth and nitrogen content in plantation trees
272

nitrogen cycling in pinus taeda
273

nutrient cycling in oak
274

general view of pack forest at warrensburg
275

view of 30 year old red pine plantation
276

hinckley series sandy loam in outwash
277

red pine plantation root
278

view of white spruce plantations at warrensburg
279

dr. h. lowenstein in 25 year old red pine
280

dr. howard lowenstein in heiberg's 25 year old red pine
281

red pine 30 years old at warrensburg
282

untreated red pine plantation
283

red pine plantation 35 years old
284

view of branch of deficient white pine
285

spodsol in clay loam
286

humoferric podzol
287

humoferric podzol
288

general view of humoferric podzol
289

general view of perturbation
290

closer view of windthrow perturbation
291

humoferric podzol
292

view of orthic humoferric podzol
293

humoferric podzol
294

soil moisture measuring equipment
295

windblown fine sand
296

fine windblown sand over waterlaid
297

graph showing change in available phosphorus
298

weak ferric profile
299

orthic humoferric podzol
300

orthic humoferric podzol
301

podzol after disturbance
302

sol brun acide in healthland soil
303

orthic ferropodzol
304

portion of soil map for south eastern vancouver island
305

close-up of soil map for part of south eastern vancouver island
306

soil map for part of plonski forest (emu)
307

fri cover type map for portion of plonski (emu) forest
308

map with overlay of fri cover types and soil types
309

brown podzolic
310

fine sandy loam
311

black spruce on soil
312

ross-section through a hummock
313

disturbed podzol
314

sandy-silt alluvial
315

soil under woodland
316

profile in well-drained gneiss material
317

well-developed profile imperfectly drained
318

profile in well-drained sandy alluvial material
319

profile in sandy clay alluvium
320

surface view of #320
321

surface of #320 with no vegetation
322

sandy well-drained under woodland
323

profile in weathered gneissic drift
324

poorly drained recent alluvial
325

alluvial sandy clay
326

well-drained under wooded grassland
327

well-drained under woodland
328

profile under hardwood (mainly maple)
329

profile under hardwood (mainly maple)
330

general view of pit
331

close-up of structure in lower bt/cca showing prismatic-columnar structure
332

close-up view of weathering of piece of gneiss
333

well-drained sand loam
334

surface of wooded soil (hardwoods)
335

profile under brush
336

profile under brush
337

profile in dump till over basal till
338

profile in dump till/basal till
339

boundary between dump till and basal till
340

profile in well-drained varved clays
341

till over limestone boulders
342

digging a soil pit in old agricultural land in eastern ontario
343

profile in clay loam
344

untitled soil profile
345