scholarly journals Quantifying soil surface change in degraded drylands: Shrub encroachment and effects of fire and vegetation removal in a desert grassland

2012 ◽  
Vol 117 (G2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Joel B. Sankey ◽  
Sujith Ravi ◽  
Cynthia S. A. Wallace ◽  
Robert H. Webb ◽  
Travis E. Huxman
Keyword(s):  
Soil Surface ◽  
Shrub Encroachment ◽  
Desert Grassland ◽  
Surface Change ◽  
Vegetation Removal

scholarly journals Interactive Effects of Black-Tailed Prairie Dogs and Cattle on Shrub Encroachment in a Desert Grassland Ecosystem

PLoS ONE ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. e0154748 ◽  
Author(s):  
Eduardo Ponce-Guevara ◽  
Ana Davidson ◽  
Rodrigo Sierra-Corona ◽  
Gerardo Ceballos
Keyword(s):  
Shrub Encroachment ◽  
Prairie Dogs ◽  
Interactive Effects ◽  
Grassland Ecosystem ◽  
Desert Grassland

Herbaceous standing crop in relation to surface and subsurface rockiness

Bothalia ◽  
1983 ◽  
Vol 14 (2) ◽  
pp. 259-264 ◽  
Author(s):  
M. C. Rutherford
Keyword(s):  
Standing Crop ◽  
Soil Surface ◽  
Plant Production ◽  
Annual Rainfall ◽  
Plant Responses ◽  
Desert Grassland ◽  
Surface Rock ◽  
Rock Types ◽  
Rock Cover ◽  
Geological Substrates

A study, carried out in non-wooded parts of savanna and in desert grassland, demonstrated that herbaceous standing crop can decrease with increasing surface rock cover. However, such decreases corresponded more directly to a soil volumetric decrease than to a decrease in soil surface area per se. The relationship was also found to depend strongly on subsurface rock weathering patterns which may reverse the indicated relationship between standing crop and surface rock cover. The application of surface rock cover data without regard to profile stoniness, is, therefore, likely to be of limited use for comparing plant production across different geological substrates. The role of different rock types in giving rise to soils of different fertility with corresponding plant responses, was also indicated by the data. Sensitivity of plant standing crop to surface rock cover was possibly dependent on mean annual rainfall, but further data are required. The interpretation of aboveground standing crop data in terms of aboveground annual production is briefly discussed.

CLIMATIC/EDAPHIC CONTROLS ON SOIL CARBON/NITROGEN RESPONSE TO SHRUB ENCROACHMENT IN DESERT GRASSLAND

2007 ◽  
Vol 17 (7) ◽  
pp. 1911-1928 ◽  
Author(s):  
C. Winston Wheeler ◽  
Steven R. Archer ◽  
Gregory P. Asner ◽  
Chad R. McMurtry
Keyword(s):  
Soil Carbon ◽  
Shrub Encroachment ◽  
Desert Grassland ◽  
Nitrogen Response

Soil moisture dynamics and deficit of desert grassland with anthropogenic introduced shrub encroachment in the eastern Ningxia, China

2020 ◽  
Vol 40 (4) ◽  
Author(s):  
赵亚楠 ZHAO Yanan ◽  
于露 YU Lu ◽  
周玉蓉 ZHOU Yurong ◽  
王红梅 WANG Hongmei ◽  
马千虎 MA Qianhu ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Shrub Encroachment ◽  
Desert Grassland ◽  
Soil Moisture Dynamics ◽  
Moisture Dynamics

Modelling the mineralisation of plant residues on the soil surface

Agronomie ◽  
2002 ◽  
Vol 22 (7-8) ◽  
pp. 711-722 ◽  
Author(s):  
Axel Berkenkamp ◽  
Eckart Priesack ◽  
Jean Charles Munch
Keyword(s):  
Soil Surface ◽  
Plant Residues

Status and development prospects of standard means for reproducing units of volumetric activity of radon and thoron and radon flux density from the soil surface

2020 ◽  
pp. 69-73
Author(s):  
S.G. Birjukov ◽  
O.I. Kovalenko ◽  
A.A. Orlov
Keyword(s):  
Flux Density ◽  
Soil Surface ◽  
National Standards ◽  
Measuring Instruments ◽  
Volumetric Activity ◽  
Standard Means ◽  
Radon Flux ◽  
Technical Solutions ◽  
Development Prospects ◽  
Physical Principles

The approach to creating standard means for reproducing units of volumetric activity of radon and thoron and flux density of radon from the soil surface is described based on the physical principles of reproducing these units of quantities and using as technical means for reproducing bubblers with a radioactive solution of radium salt, reference capacities of known volume, emanation chambers for generation of a toron, a gamma spectrometer with a semiconductor detector from highly pure germanium and radon radiometers. Reproduction consists in the physical realization of units in accordance with their definition as applied to the formation of radon and thoron in the radioactive rows of radium and thorium. The proposed approach will allow to determine the structural, structural and other technical solutions of standard measuring instruments, as well as specific techniques and methods of working with them. The creation of standard tools and technologies for reproducing units of volumetric activity of radon and thoron and the density of radon flux from the soil surface will ensure the unity and reliability of measurements in the field of ionizing radiation, traceability of units and bringing the characteristics of national standards in line with world achievements.

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