Nitrogen mineralisation in a sandy soil under native eucalypt forest and exotic pine plantations in relation to moisture content

1980 ◽  
Vol 11 (1) ◽  
pp. 71-79 ◽  
Author(s):  
P. Hopmans ◽  
D. W. Flinn ◽  
P. W. Farrell
1978 ◽  
Vol 5 (3) ◽  
pp. 305 ◽  
Author(s):  
GC Suckling ◽  
A Heislers

[See also FA 39, 2088] A 2-yr trapping study was made on (a) Rattus fuscipes, (b) Antechinus stuartii, (c) Mus musculus and (d) A. swainsonii in mature eucalypt forest, a narrow stream-side strip of eucalypt forest, and in 3 pine plantations, 8, 22 and 42 yr old. In each area (a) and (d) were largely and (c) always confined to dense native vegetation along streams, whilst (b) was more frequent along streams than on slopes. More animals were found away from streams in young pine plantations than in other forest types.


1954 ◽  
Vol 2 (3) ◽  
pp. 168-175
Author(s):  
R.H.A. Van Duin ◽  
D.A. De Vries

The automatic apparatus described comprises a number of elements which, placed to various depths at 3-90 cm in field soils, are successively switched on so as to give a straight-line photographic record of the deflections of a galvanometer. The gradient of the line is a measure of thermal conductivity, from which moisture content may indirectly be computed and evapo-transpiration determined by repeated measurements. Results of moisture determinations in a sandy soil under grass cover are reported. The method is well suited for observing moisture changes in lysimeters. (Abstract retrieved from CAB Abstracts by CABI’s permission)


2015 ◽  
Vol 335 ◽  
pp. 261-269 ◽  
Author(s):  
A. Slijepcevic ◽  
W.R. Anderson ◽  
S. Matthews ◽  
D.H. Anderson

2014 ◽  
Vol 575 ◽  
pp. 103-107 ◽  
Author(s):  
Nidal H. Abu-Hamdeh

The granular materials examined in this study were some Saudian soils. The effect of water content and bulk density on the specific heat and volumetric heat capacity of two Saudian soils (sand and loam) was investigated through laboratory studies. These laboratory experiments used the calorimetric method to determine specific heat of soils. For the type of soils studied, specific heat increased with increased moisture content. Also, volumetric heat capacity increased with increased moisture content and soil density. The volumetric heat capacity and specific heat of soils observed were compared with independent estimates made using derived theoretical relations. The differences between the observed and predicted results were very small. Loam soil generally had higher specific heat and volumetric heat capacity than sandy soil for the same moisture content and soil density.


2003 ◽  
pp. 21-25
Author(s):  
Csaba Varga

The purpose of our experiments is to study effect of different soil coverings (porous black polyethylene called agroszövet and black polyethylene) on CO2 production in sandy soil. The CO2 production was measured in our laboratory according to Witkamp (1966 cit. Szegi, 1979), after 5 days’ incubation period. Samples were taken off four times (March, May, July, September) in every year of the experiment. In May, July and September of 2000, the CO2 production was significantly higher in the control than in the treatment soil. With the exception of September, the value of CO2 production was significantly higher under black polyethylene than under agroszövet. In March and May of 2001, the soil under black polyethylene, and in July and September the control soil produced the greatest quantity of CO2. With the exception of July, significantly more CO2 was produced under black polyethylene than under agroszövet. To study the dynamic of CO2 production there was find a significantly higher value May and September of 2001 than 2000. Similarly significant higher CO2 production was detected in September than in the other months In average of two experimental years the difference between the produced CO2 under different coverings was occasionally. Explicit upward tendency in soil CO2 production was detected only in case of control soil. There was a medium (r=0,413) relationship observed between the moisture content and the CO2 producing ability of soil. To sum up the soil coverings had favourable effect on soil CO2 production very rearly, but they could help to conserve the moisture content of soil.


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