Factors Controlling Growth of Pond Pine Seedlings in Organic Soils of the Carolinas

1958 ◽  
Vol 28 (3) ◽  
pp. 219-236 ◽  
Author(s):  
George M. Woodwell
Keyword(s):  
Organic Soils ◽  
Pine Seedlings ◽  
Pond Pine

Factors affecting sustained smouldering in organic soils from pocosin and pond pine woodland wetlands

2007 ◽  
Vol 16 (1) ◽  
pp. 107 ◽  
Author(s):  
James Reardon ◽  
Roger Hungerford ◽  
Kevin Ryan
Keyword(s):  
Logistic Regression ◽  
Moisture Content ◽  
Mineral Content ◽  
Prescribed Burning ◽  
Organic Soils ◽  
Moisture Contents ◽  
Muck Soil ◽  
Laboratory Results ◽  
Smouldering Combustion ◽  
Pond Pine

The smouldering combustion of peat and muck soil plays an important role in the creation and maintenance of wetland communities. This experimental study was conducted to improve our understanding of how moisture and mineral content constrain smouldering in organic soil. Laboratory burning was conducted with root mat and muck soil samples from pocosin and pond pine woodland wetlands common on the North Carolina coastal plain. The results of laboratory and prescribed burning were compared. Laboratory results showed that moisture and mineral content influenced sustained smouldering in root mat soils. Predictions based on logistic regression analysis show that root mat soils with an average mineral content of 4.5% had an estimated 50% probability of sustained smouldering at a moisture content of 93%, whereas at moisture contents above 145% the estimated probability was less than 10%. The odds that root mat soil will sustain smouldering decrease by 19.3% for each 5% increase in moisture content. Root mat soils with an average mineral content of 5.5% and a moisture content of 93% had an estimated 61% probability of sustained smouldering. The odds that root mat soil will sustain smouldering combustion increased by 155.9% with each 1% increase in mineral content. Root mat and muck soils differ in physical and chemical characteristics expected to influence smouldering behaviour. The formation of muck soil has led to increases in density, smaller soil particle size, changes in water holding characteristics and increases in waxes, resins and bituminous compounds. Muck soil smouldered at higher moisture contents than root mat soil. Muck soil at a moisture content of 201% had an estimated 50% probability of sustained smouldering, whereas at moisture contents above 260% the estimated probability was less than 10%. The odds that muck soil will sustain smouldering combustion decrease by 17.2% with each 5% increase in moisture content. Ground fire in the prescribed burns stopped its vertical spread in organic soils at moisture contents consistent with logistic regression predictions developed from our laboratory results.

Root growth studies on Mugho pine

1970 ◽  
Vol 48 (1) ◽  
pp. 43-47 ◽  
Author(s):  
G. F. Mason ◽  
D. S. Bhar ◽  
R. J. Hilton
Keyword(s):  
Root Growth ◽  
Thin Layer ◽  
Root Exudates ◽  
Root Elongation ◽  
Sandy Loam ◽  
Root Diameter ◽  
Organic Soils ◽  
Southern Ontario ◽  
Pine Seedlings ◽  
The University

Root growth of Mugho pine seedlings was studied in Southern Ontario using a recently constructed rhizotron at the University of Guelph. The investigations have indicated that root growth of this pine in the season following transplanting extends from April to late November. During the summer, average daily root elongation was found to be 6.5 mm in sandy loam and 5.4 mm in organic soils, while during the autumn it was 2.9 and 3.7 mm respectively. Correlations were found to exist between root diameter and rates of root elongation, and suberization. The latter phenomenon began 5 to 7 days after new root growth. In late autumn metacutization occurred. A resinous type of exudate has been observed from the fully suberized roots. Qualitative thin-layer chromatographic studies have shown that the root exudates differed from exudates obtained by wounding pine shoots.

Ultrastructure of the soil fungus, Geomyces pannorus

1984 ◽  
Vol 42 ◽  
pp. 738-739
Author(s):  
J. A. Traquair ◽  
E. G. Kokko
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fine Structure ◽  
Low Temperatures ◽  
Soil Fungus ◽  
Organic Soils ◽  
Anatomical Studies ◽  
Transmission Electron ◽  
Electron Microscopical ◽  
Scanning Electron

With the advent of improved dehydration techniques, scanning electron microscopy has become routine in anatomical studies of fungi. Fine structure of hyphae and spore surfaces has been illustrated for many hyphomycetes, and yet, the ultrastructure of the ubiquitous soil fungus, Geomyces pannorus (Link) Sigler & Carmichael has been neglected. This presentation shows that scanning and transmission electron microscopical data must be correlated in resolving septal structure and conidial release in G. pannorus.Although it is reported to be cellulolytic but not keratinolytic, G. pannorus is found on human skin, animals, birds, mushrooms, dung, roots, and frozen meat in addition to various organic soils. In fact, it readily adapts to growth at low temperatures.

The yield of perennial grass stands on drained organic soils of Steppe

2016 ◽  
Vol 1 (90) ◽  
pp. 92-97
Author(s):  
I.T. Slusar ◽  
V.A. Serbenyuk ◽  
A.N. Gera ◽  
A.P. Solyanik ◽  
A.A. Tarasenko
Keyword(s):  
Zinc Sulphate ◽  
Foliar Application ◽  
Perennial Grass ◽  
Mineral Fertilizer ◽  
Dry Weight ◽  
Research Area ◽  
Organic Soils ◽  
Growth Promoters ◽  
Cobalt Sulfate ◽  
The Impact

Research on the impact of the introduction of micro fertilizers and growth promoters on a background of mineral fertilizer and without N90R45К120 spent on old peat in shallow carbonate floodplain r.Supiy, Yahotyn Kyiv region. Power peat horizon about 60-70 cm, 7,4-7,6 pH of the aqueous extract, stupas schedule 56-60%, density 0,49-0,52 assembly soil, total nitrogen content (%) - 1.9; gross forms of phosphorus - 0,4, potassium 0.2, 20% lime. In experiments studying biological rehoplant, radustym, Biolan, emistim, Jets, humisol, plantafol, radyfarm and micronutrients: copper, boric acid, manganese sulphate, zinc sulphate, potassium humates. Treatment drugs conducted in the spring by spraying mixtures. Space research area of 60 m2, three-time repetition. It is established that the use of growth stimulants and micronutrients in the background N90R45К120 provided the highest yield mixtures of years, against making BIOLan - 9.9 t / ha Radyfarmu - 9.6 t / ha Radostymu 9.3 t / ha dry weight. In areas for making other preparations were intermediate yield growth rates - 0.5 - 2.0 t / ha dry weight. Also good gains herbage yields obtained by making all kinds of micronutrients and growth stimulants in the background without making makrodobryv which was within 5.3 - 6.9 t / ha to control without fertilization - 4.5 t / ha dry weight. In deep peat copper fertilizer (25 kg / ha of copper sulphate or 5 kg / ha pirytnoho cinders) in all zones should be making every 3-4 years, and zinc, cobalt and molybdenum advisable to make time for the growing season, spring, by foliar application in such numbers: ammonium molibdenovokyslyy - 0.3 kg / ha; cobalt sulfate - 3 kg / ha zinc sulphate 0.5 kg / ha or placers these salts should be mixed with major fertilizer.

Studies of Phosphorus Availability in Organic Soils

1958 ◽  
Vol 22 (4) ◽  
pp. 336-339 ◽  
Author(s):  
J. E. Larsen ◽  
G. F. Warren ◽  
Ruble Langston
Keyword(s):  
Phosphorus Availability ◽  
Organic Soils

Studies on the Leaching of Applied Labeled Phosphorus in Organic Soils

1958 ◽  
Vol 22 (6) ◽  
pp. 558-560 ◽  
Author(s):  
J. E. Larsen ◽  
Ruble Langston ◽  
G. F. Warren
Keyword(s):  
Organic Soils
Sign in / Sign up

Export Citation Format

Share Document