نتایج جستجو برای: arid and semi arid zones

تعداد نتایج: 16853983  

Journal: :Agronomy 2023

Increasing agricultural production is a major concern that aims to increase income, reduce hunger, and improve other measures of well-being. Recently, the prediction soil-suitability has become primary topic rising among academics, policymakers, socio-economic analysts assess dynamics production. This work use physico-chemical remotely sensed phenological parameters produce maps (SSM) based on ...

Journal: :Remote Sensing 2022

Drought affects the growth and productivity of vegetation, analysis drought resistance vegetation can help ecological environmental protection sustainable development in drought-prone areas. The Loess Plateau (LP) is a area China with an extremely fragile environment. This study analyzed across different climate regions biotypes, explored characteristics changes before after implementation Grai...

2000
G. Rana N. Katerji

The Mediterranean regions are submitted to a large variety of climates. In general, the environments are arid and semi-arid with summers characterised by high temperatures and small precipitation. Due to the scarcity of water resources, the correct evaluation of water losses by the crops as evapotranspiration (ET) is very important in these regions. In this paper, we initially present the most ...

Journal: :Integrative and comparative biology 2002
Joseph B Williams B Irene Tieleman

The adaptive significance of mechanisms of energy and water conservation among species of desert rodents, which avoid temperature extremes by remaining within a burrow during the day, is well established. Conventional wisdom holds that arid-zone birds, diurnal organisms that endure the brunt of their environment, occupy these desert climates because of the possession of physiological design fea...

2017
Tafadzwanashe Mabhaudhi Vimbayi G. P. Chimonyo Albert T. Modi

Underutilised crops represent an important component of agro-biodiversity with potential to contribute to climate change adaptation, food security and sovereignty in poor rural areas. However, despite emerging research interest, they continue to occupy the peripheries of mainstream agriculture. There is a need to consolidate the gains made and propose a coherent strategy for translating underut...

Journal: :Remote Sensing 2013
Anton Vrieling Jan de Leeuw Mohammed Y. Said

The spatial distribution of crops and farming systems in Africa is determined by the duration of the period during which crop and livestock water requirements are met. The length of growing period (LGP) is normally assessed from weather station data—scarce in large parts of Africa—or coarse-resolution rainfall estimates derived from weather satellites. In this study, we analyzed LGP and its var...

2012
Jian-Ying Ma Wei Sun Xiao-Ning Liu Fa-Hu Chen

Water availability is the most influential factor affecting plant carbon (δ(13)C) and nitrogen (δ(15)N) isotope composition in arid and semi-arid environments. However, there are potential differences among locations and/or species in the sensitivity of plant δ(13)C and δ(15)N to variation in precipitation, which are important for using stable isotope signatures to extract paleo-vegetation and ...

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