scholarly journals Ecological Studies on Alopeculus aequalis Sobol. : (3) Influence of soil moisture on the dormancy and longevity of seeds. : (4) Seasonal variation in the viable seed population and its vertical distribution in the soil.

1956 ◽  
Vol 24 (4) ◽  
pp. 319-323
Author(s):  
Masao ARAI ◽  
Takayoshi KATAOKA
Keyword(s):  
Soil Moisture ◽  
Seasonal Variation ◽  
Vertical Distribution ◽  
Viable Seed ◽  
Ecological Studies ◽  
Seed Population

Seasonal variation of deep soil moisture under different land uses on the semi-arid Loess Plateau of China

2018 ◽  
Vol 19 (3) ◽  
pp. 1179-1189 ◽  
Author(s):  
Bowei Yu ◽  
Gaohuan Liu ◽  
Qingsheng Liu ◽  
Chong Huang ◽  
He Li ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Seasonal Variation ◽  
Loess Plateau ◽  
Land Uses ◽  
Deep Soil ◽  
Semi Arid

Daily inundation induced seasonal variation in the vertical distribution of soil water salinity in an estuarine mangrove forest under a tropical monsoon climate

2020 ◽  
Vol 35 (4) ◽  
pp. 638-649
Author(s):  
Akira Komiyama ◽  
Sasitorn Poungparn ◽  
Suthathip Umnouysin ◽  
Chadtip Rodtassana ◽  
Shogo Kato ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Vertical Distribution ◽  
Soil Water ◽  
Mangrove Forest ◽  
Water Salinity ◽  
Monsoon Climate ◽  
Tropical Monsoon ◽  
The Vertical Distribution

Seasonal variation of near surface black carbon and satellite derived vertical distribution of aerosols over a semi-arid station in India

2017 ◽  
Vol 184 ◽  
pp. 77-87 ◽  
Author(s):  
Raja Obul Reddy Kalluri ◽  
Balakrishnaiah Gugamsetty ◽  
Rama Gopal Kotalo ◽  
Siva Kumar Reddy Nagireddy ◽  
Chakradhar Rao Tandule ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Vertical Distribution ◽  
Black Carbon ◽  
Near Surface ◽  
Semi Arid

Tick (Acari: Ixodidae) ecological studies in Tanzania

1986 ◽  
Vol 76 (2) ◽  
pp. 229-246 ◽  
Author(s):  
R. J. Tatchell ◽  
E. Easton
Keyword(s):  
Seasonal Variation ◽  
Host Density ◽  
Dar Es Salaam ◽  
Rhipicephalus Appendiculatus ◽  
Amblyomma Variegatum ◽  
The Other ◽  
Theileria Parva ◽  
Ecological Studies ◽  
Adult Abundance

AbstractTicks were regularly collected from cattle along transects in Sukumaland and the Southern Highlands, Tanzania, and from locations near Tabora, Mbeya, Arusha and Dar es Salaam from 1973 to 1976. Marked seasonal variation in abundance occurred in Rhipicephalus appendiculatus Neumann in the Southern Highlands (but not in Sukumaland) and in Amblyomma variegatum (F.) near Tabora. It was possible to detect Theileria parva antibodies in cattle sera from the Southern Highlands only during the season of R. appendiculatus adult abundance. Despite this there was no evidence of enzootic instability of the disease. The results demonstrate that the behaviour and distributions of these and the other species of ticks found are not fixed and constant but vary according to a complicated interplay of factors as yet imperfectly understood, such as climate and vegetation and host density, susceptibility and grazing habits.

Sulfur speciation, vertical distribution, and seasonal variation in a northern hardwood forest soil, U.S.A

1995 ◽  
Vol 25 (2) ◽  
pp. 234-243 ◽  
Author(s):  
B.R. Dhamala ◽  
M.J. Mitchell
Keyword(s):  
Seasonal Variation ◽  
Vertical Distribution ◽  
Forest Soil ◽  
Specific Activity ◽  
Soil Depth ◽  
Mineral Soil ◽  
Hardwood Forest ◽  
Northern Hardwood Forest ◽  
Northern Hardwood ◽  
Sulfur Speciation

Sulfur biogeochemistry of a northern hardwood forest soil in Bear Brook Watershed, Maine, was studied utilizing 35S in situ. The objectives of study were to characterize different S pools, their vertical distribution, and seasonal variation. Soil cores were used at the field and treated with 35SO42−. The distribution of total and C-bonded S followed a typical pattern of decreasing concentration with soil depth. More than 86% of total 35S added was retained by the soil. Most of the 35S activity was in the organic S pool (up to 73 and 20% of total 35S in C-bonded S and ester-sulfate forms, respectively) in both the forest floor and the mineral soil horizons. Ester sulfate increased with depth from 5.3 to 25.5% of total S. During the summer the relative importance of mineralization to immobilization decreased. Inorganic sulfate was the smallest S pool. However, higher specific activity and turnover rate of the inorganic 35SO42− pool than organic 35S pool indicated that S concentration and solution flux were more regulated by abiotic (adsorption and desorption) than biotic (mineralization and immobilization) processes.

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