scholarly journals Analysis of rainfall characteristics and moisture availability index for crop planning in semi arid region of north Gujarat

2021 ◽  
Vol 23 (4) ◽  
pp. 409-415
Author(s):  
JAYDIP J. MAKWANA ◽  
B. S. DEORA ◽  
C. K. PATEL ◽  
B. S. PARMAR ◽  
A. K. SAINI
Keyword(s):  
Meteorological Data ◽  
Irrigation Management ◽  
Moisture Stress ◽  
Distribution Functions ◽  
Agricultural Crop ◽  
Sowing Time ◽  
Crop Planning ◽  
Semi Arid Region ◽  
North Gujarat ◽  
Semi Arid

The rainfall, one of the most important natural input resource for dryland agricultural production system, is erratic and temporal in nature. An attempt has been made to analyze thirty years (1990-2019) of meteorological data for prediction of probable week of onset and withdrawal of monsoon and to end with crop planning in North Gujarat region (India).The highest and lowest amount of weekly rainfall was observed in 27th and 39th SMW, respectively. The probability distribution functions viz. generalized extreme value, Gumbel maximum, Gamma and Weibull were found best-fit for prediction of weekly rainfall. The analysis revealed 26th SMW (25 Jun – 01 Jul) and onwards as the most suited sowing time of kharif crops. There are also chances of occurrence of moisture stress during 34th and 35th SMW. The results would be useful for agricultural scientists, researchers, decision makers and policy planners in the field of agricultural crop planning and irrigation management for semi arid regions. 

scholarly journals Are smallholder farmers’ perceptions of climate variability supported by climatological evidence? Case study of a semi-arid region in South Africa

2020 ◽  
Vol 12 (5) ◽  
pp. 571-585 ◽  
Author(s):  
Maropene Tebello Rapholo ◽  
Lawrence Diko Makia
Keyword(s):  
South Africa ◽  
Climate Variability ◽  
Arid Region ◽  
Smallholder Farmers ◽  
Linear Trend ◽  
Meteorological Data ◽  
Sub Saharan Africa ◽  
Content Type ◽  
Semi Arid Region ◽  
Semi Arid

Purpose Literature contends that not much is known about smallholder farmers’ perceptions of climate variability and the impacts thereof on agricultural practices in Sub-Saharan Africa and South Africa in particular. The purpose of this study is to examine the perceptions of smallholder farmers from Botlokwa (a semi-arid region in South Africa) on climate variability in relation to climatological evidence. Design/methodology/approach The study area is in proximity to a meteorological station and comprises mainly rural farmers, involved in rain-fed subsistence agriculture. Focus group discussions and closed-ended questionnaires covering demographics and perceptions were administered to 125 purposely sampled farmers. To assess farmers’ perceptions of climate variability, their responses were compared with linear trend and variability of historical temperature and rainfall data (1985-2015). Descriptive statistics were used to provide insights into respondents’ perceptions. Findings About 64% of the farmers perceived climate variability that was consistent with the meteorological data, whereas 36% either held contrary observations or were unable to discern. Age, level of education, farming experience and accessibility to information influenced the likelihood of farmers to correctly perceive climate variability. No significant differences in perception based on gender were observed. This study concludes that coping and adaption strategies of over one-third of the farmers could be negatively impacted by wrong perceptions of climate variability. Originality/value This study highlights discrepancies in perceptions among farmers with similar demographic characteristics. To guarantee sustainability of the sector, intervention by government and other key stakeholders to address underlying factors responsible for observed discrepancies is recommended.

scholarly journals Global comparison of 20 reference evapotranspiration equations in a semi-arid region of Iran

2018 ◽  
Vol 50 (1) ◽  
pp. 282-300 ◽  
Author(s):  
Hadi Farzanpour ◽  
Jalal Shiri ◽  
Ali Ashraf Sadraddini ◽  
Slavisa Trajkovic
Keyword(s):  
Arid Region ◽  
Reference Evapotranspiration ◽  
Meteorological Data ◽  
Irrigation Scheduling ◽  
Climatic Conditions ◽  
Accurate Estimation ◽  
Management Scenarios ◽  
Global Comparison ◽  
Semi Arid Region ◽  
Semi Arid

Abstract Accurate estimation of reference evapotranspiration (ETo) is a major task in hydrology, water resources management, irrigation scheduling and determining crop water requirement. There are many empirical equations suggested by numerous references in literature for calculating ETo using meteorological data. Some such equations have been developed for specific climatic conditions while some have been applied universally. The potential for usage of these equations depends on the availability of necessary meteorological parameters for calculating ETo in different climate conditions. The focus of the present study was a global cross-comparison of 20 ETo estimation equations using daily meteorological records of 10 weather stations (covering a period of 12 years) in a semi-arid region of Iran. Two data management scenarios, namely local and cross-station scenarios, were adopted for calibrating the applied equations against the standard FAO56-PM model. The obtained results revealed that the cross-station calibration might be a good alternative for local calibration of the ETo models when proper similar stations are used for feeding the calibration matrix.

Perceptions of and Adaptations to Climate Change, Determinants and Barriers Among Pastoralists in Inner Mongolia, Arid and Semi-Arid Region of China

2021 ◽  
Author(s):  
Qi Wang ◽  
Huamin Liu ◽  
Xuhua Liu ◽  
Zhichao Xu ◽  
Lu Wen ◽  
...  
Keyword(s):  
Climate Change ◽  
Inner Mongolia ◽  
Arid Region ◽  
Meteorological Data ◽  
Probit Model ◽  
Adaptation Strategies ◽  
Pastoral System ◽  
Access To Credit ◽  
Semi Arid Region ◽  
Semi Arid

Abstract Climate change is going to be one that presents major challenges facing pastoral system, especially in arid and semi-arid region. How pastoralists perceive and adapt has become increasingly important part in providing foundation for households and governments to develop adaptation policies. This article aims to investigate the pastoralists' perceptions on climatic change variability and impacts, in addition, to explore the pastoralists' adaptation strategies and determinants using a Multivariate Probit Model, as well as barriers and needs in the adaptive process. We collected questionnaires from the pastoral areas across four districts in Inner Mongolia. The findings revealed that pastoralists' perception of the inter-annual temperature variation is relatively coincide with actual meteorological data. This study found that 11 adaptation strategies have been commonly used by pastoralists, moreover, household production capital, risk-buffering capacity, and social network influenced the pastoralists' adaptations. However, barriers remain for pastoralists, such as inadequate capital and labor, lack of water, limited access to credit, technological knowledge, and timely weather information. Further, our findings indicated that pastoralists need hazard relief fund, improved pasture facilities, technical knowledge training, active weather-based information, integrated pest and disease management and off-farm employment opportunities. This combination of our findings potentially provides some support for developing appropriate and long-term specific policies to mitigate the adverse impacts of climate change.

The Molecular Characterization and Biological Assessment of the Leaves Extracts of Loofah Reveal their Nutraceutical Potential

2020 ◽  
Vol 11 ◽  
Author(s):  
Takoua Ben Hlel ◽  
Feten Belhadj ◽  
Fatih Gül ◽  
Muhammed Altun ◽  
Ayşe Şahin Yağlıoğlu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Phenolic Compounds ◽  
Hela Cell ◽  
Arid Region ◽  
Biological Properties ◽  
Biological Assessment ◽  
Omega 3 ◽  
Hela Cell Lines ◽  
Semi Arid Region ◽  
Semi Arid

Background:: Luffa cylindrica is a plant that is widely distributed in Africa and Asia and it can be grown in regions with tropical or subtropical climates. Few patents dealt with Loofah biological properties, including some functional foods formulated from its leaves. Objective:: This study aimed to structurally and functionally characterize the bioactive compounds of L. cylindrica leaves grown in two different environments. Methods:: The extracts of L. cylindrica leaves collected from two Tunisian locations: Essouasi (LE), a semi-arid region and Medenine (LM) an arid region, were investigated for their phenolic compounds and fatty acids using HPLC/TOF-MS and GCMS techniques respectively. Furthermore, the antioxidant capacity was evaluated with DPPH, Chelating effect, Hydroxyl radical and Superoxide anion scavenging activities while the anticancer activity against HeLa cell lines was assessed using xCELLigence real time cell analyzer and lactate dehydrogenase cytotoxicity assay. Results:: The antiproliferative capacity of both extracts was time and dose-dependent with LE presenting the lowest HeLa cell index (CI = 0.035 ± 0.018, 250 μg/ml). LE also showed the best cytotoxic capacity (56.49 ± 0.8%) and antioxidant potential (IC50 = 54.41 ± 1.12 μg/ml for DPPH and 12.12 ± 0.07 μg/ml for chelating effet). 14 phenolic compounds were detected in LE with ferulic acid being the major compound (5128.5 ± 4.09 μg Phenols/g) while LM had only 6 phenolics. GCMS analysis showed the presence of omega-3 fatty acids in LE. Conclusions:: Our findings suggest that L. cylindrica leaves, especially when collected from semi-arid regions, are promising for formulating nutraceuticals of interest.

Space-time monitoring of soil organic carbon content across a semi-arid region of Australia

2021 ◽  
Vol 24 ◽  
pp. e00367
Author(s):  
Patrick Filippi ◽  
Stephen R. Cattle ◽  
Matthew J. Pringle ◽  
Thomas F.A. Bishop
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Arid Region ◽  
Space Time ◽  
Organic Carbon Content ◽  
Soil Organic Carbon Content ◽  
Semi Arid Region ◽  
Semi Arid
Sign in / Sign up

Export Citation Format

Share Document