scholarly journals Pedological Characterization of Typical Soils of Dodoma Capital City District, Tanzania: Soil Morphology, Physico-chemical Properties, Classification and Soil Fertility Trends

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
Balthazar M. Msanya ◽  
◽  
Tumaini A. Mwasyika ◽  
Nyambilila Amuri ◽  
Ernest Semu ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Chemical Properties ◽  
Capital City ◽  
Soil Morphology ◽  
Fertility Trends ◽  
Physico Chemical ◽  
City District

Topological characterization of dendrimer, benzenoid, and nanocone

2018 ◽  
Vol 74 (1-2) ◽  
pp. 35-43
Author(s):  
Wei Gao ◽  
Muhammad Kamran Siddiqui ◽  
Najma Abdul Rehman ◽  
Mehwish Hussain Muhammad
Keyword(s):  
Chemical Properties ◽  
Chemical Compounds ◽  
Topological Indices ◽  
Zagreb Index ◽  
Topological Characterization ◽  
Complex Molecules ◽  
Chemical Structures ◽  
Physico Chemical ◽  
Quantitative Structure Activity Relationships

Abstract Dendrimers are large and complex molecules with very well defined chemical structures. More importantly, dendrimers are highly branched organic macromolecules with successive layers or generations of branch units surrounding a central core. Topological indices are numbers associated with molecular graphs for the purpose of allowing quantitative structure-activity relationships. These topological indices correlate certain physico-chemical properties such as the boiling point, stability, strain energy, and others, of chemical compounds. In this article, we determine hyper-Zagreb index, first multiple Zagreb index, second multiple Zagreb index, and Zagreb polynomials for hetrofunctional dendrimers, triangular benzenoids, and nanocones.

scholarly journals Farmers’ Perceptions about the Effect of Farm Land Management Practices and Soil Depth on the Distribution of Major Soil Physico-Chemical Properties in Eroded Soils of Aboy Gara Watershed, Gidan District, North Wollo Zone

2018 ◽  
Vol 2 (2) ◽  
pp. 186-195
Author(s):  
Gebeyaw Tilahun Yeshaneh
Keyword(s):  
Plant Growth ◽  
Soil Fertility ◽  
Land Management ◽  
Management Practices ◽  
Soil Depth ◽  
Chemical Properties ◽  
Soil Drainage ◽  
Fertility Status ◽  
Physico Chemical ◽  
Black Color

The study was conducted at the Abuhoy Gara Catchment, which is located in the Gidan District of North Wello Zone. The aim of the study was to study farmers’ perceptions about the effect of farm land management practices and soil depth on the distribution of major soil physico-chemical properties in eroded soils of Aboy Gara watershed. To address this issue, semi-structured interviews were conducted in 64 households to gain insight into soil fertility management practices, local methods were used to assess the fertility status of a field, and perceived trends in soil fertility. Thirty-three farmers were then asked to identify fertile and infertile fields. According to farmers response, farmers’ fields were characterized as fertile where it comprise black color, cracks during dry season, good crop performance, vigorous growth of certain plants and presence of plants in a dry environment whereas the infertile is where it shows yellow/white and red colors, compacted soils, stunted plant growth, presence of rocks and stones and wilting or dying of crops in a hot environment. A total of eight indicators (soil color, texture, soil depth, topography, soil drainage, and distance from home, type of weeds grown and cultivation intensity) were found to be used by farmers to evaluate and monitor soil fertility. The results of administered questions showed that the principal indicators mentioned by farmers as very important were soil colour (82.8%), continuous cropping land (72.2%), soil texture (62.8%), distance from home (61%), type of weeds grown (56%), soil depth (55.6%), topography (51.1%), and soil drainage (28.7%) as very important. So, among sixty four interviewed farmers: deep soil (60 farmers), soils near to home (60 farmers), forest soil (59 farmers), smooth fine soil (59 farmers), black color soil (58 farmers) and gentle slope soil (57farmers) are categorized as fertile whereas 59, 57, 56, 55, and 44farmers said that Sandy/coarse soil, shallow soil depth, steep slope soils and yellow/white, red soils and continuously cultivated soils are infertile, respectively. The overall result showed that there was good agreement between farmers’ assessment of the soil fertility status of a field and a number of these indicators. The soil laboratory analysis also corresponded well with farmers’ assessment of soil fertility. Therefore, to design more appropriate research and to facilitate clear communication with farmers, researchers need to recognize farmers’ knowledge, perceptions about assessments of soil fertility. Because, as they included all soil factors affecting plant growth, farmers’ perceptions of soil fertility were found to be more long term day-to-day close practical experience finding than those of researchers.

scholarly journals Soil Fertility under Improved and Conventional Management Practices in Sanga, Kavrepalanchowk District, Nepal

2014 ◽  
Vol 9 ◽  
pp. 27-39 ◽  
Author(s):  
Ram K. Shrestha
Keyword(s):  
Soil Fertility ◽  
Management Practices ◽  
Management Practice ◽  
Chemical Properties ◽  
Soil Management ◽  
Available Phosphorus ◽  
Physico Chemical ◽  
Soil Management Practice ◽  
Upland Soils ◽  
Conventional Practice

A study was carried out to compare the fertility of soils under improved soil  management practice with that of prevailing conventional practice and to assess the farmers’ perception on the improved practice in the upland   farming system. The study was carried out in Nasikasthan Sanga of Kavrepalanchok district of Nepal. Soil samples were collected from fields under improved conventional practice. Samples were taken at 0-15 and 15-30 cm depths and were analyzed for various physico-chemical properties to  compare the fertility status of the soils under both the practices. Altogether 68 farmers were interviewed to have information on farming practices and information pertinent to improved soil management practice being adopted by them. Results from soil physico-chemical analysis showed higher fertility of soils under improved practice in terms of more favorable pH level,  contents of exchangeable bases, available phosphorus and soil organic matter compared to prevailing conventional soil management practice. Moreover, majority of the farmers believed that soil fertility and physical condition of their upland soils had improved and that the productivity of major upland  crops had also increased after the adoption of improved soil management practice. Improved practice could play an important role in the sustainable management of upland soils in the mid hills of Nepal. It is however, desirable to conduct long-term research to further ascertain the effect of the practice on soil fertility of different soil types and land uses.Nepal Agric. Res. J. Vol. 9, 2009, pp. 27-39DOI: http://dx.doi.org/10.3126/narj.v9i0.11639 

Characterization of residues and evaluation of the physico chemical properties of soybean biodiesel and biodiesel: Diesel blends in different storage conditions

2020 ◽  
Vol 151 ◽  
pp. 454-462 ◽  
Author(s):  
Leandro Fontoura Cavalheiro ◽  
Marcelo Yukio Misutsu ◽  
Rafael Cardoso Rial ◽  
Luíz Henrique Viana ◽  
Lincoln Carlos Silva Oliveira
Keyword(s):  
Chemical Properties ◽  
Storage Conditions ◽  
Physico Chemical ◽  
Soybean Biodiesel

Characterization of Physico-Chemical Properties of Oil/Water Systems: Interfacial Behavior Prediction

2004 ◽  
Vol 22 (9-10) ◽  
pp. 1199-1211 ◽  
Author(s):  
Luciana S. Spinelli ◽  
Dilon L. P. Machado ◽  
Elizabete F. Lucas ◽  
Ana M. T. Louvisse
Keyword(s):  
Chemical Properties ◽  
Water Systems ◽  
Behavior Prediction ◽  
Interfacial Behavior ◽  
Physico Chemical ◽  
Oil Water
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