Log in

Relevant bibliographies by topics / Soil drought / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Soil drought.

Dissertations / Theses on the topic 'Soil drought'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Soil drought.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Cook, H. F. "Assessment of drought resistance in soils." Thesis, University of East Anglia, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374255.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Wang, Lingli. "Remote sensing techniques for soil moisture and agricultural drought monitoring." Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/2991.

Full text

Abstract:

Thesis (Ph.D.)--George Mason University, 2008.<br>Vita: p. 151. Thesis director: John J. Qu. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Earth Systems and GeoInformation Sciences. Title from PDF t.p. (viewed June 30, 2008). Includes bibliographical references (p. 135-150). Also issued in print.

APA, Harvard, Vancouver, ISO, and other styles

3

Kang, Hyunwoo. "Soil Moisture-driven Drought Evaluation under Present and Future Conditions." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/97007.

Full text

Abstract:

Drought is one of the most severe natural disasters and detrimentally impacts water resources, agricultural production, the environment, and the economy. Climate change is expected to influence the frequency and severity of extreme droughts. This dissertation evaluates drought conditions using a variety of hydrologic modeling approaches include short-term drought forecasting, long-term drought projection, and a coupled surface-groundwater dynamic drought assessment. The economic impacts of drought are also explored through a linked economic impact model. Study results highlight the need for va

APA, Harvard, Vancouver, ISO, and other styles

4

Lindberg, Niklas. "Soil fauna and global change : responses to experimental drought, irrigation, fertilisation and soil warming /." Uppsala : Dept. of Ecology and Environmental Research, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s270.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Canarini, Alberto. "Drought Effects on Soil Carbon Stability Mediated by Rhizodeposition and Microbes." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15963.

Full text

Abstract:

Drought will increase in frequency and intensity in many areas of the world and has the potential to turn entire ecosystems from a sink to a source of C. Soil represents one of the largest C pools on earth, and small changes in the balance between inputs and outputs may have extreme consequences for total atmospheric CO2 concentrations. Outputs are determined by microbial decomposition of soil organic matter (SOM) which can be divided in pools of different inherent stability and turn-over. A major stable pool of C is represented by organo-mineral complexes (C bound to silt and clay), which is

APA, Harvard, Vancouver, ISO, and other styles

6

Burgess, Adam Jason. "The impact of soil moisture deficit on the interactions between oilseed rape and insect herbivores." Thesis, University of Hertfordshire, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296537.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Van, der Meer Frans-Bauke Willem. "Modelling tropical soil water regimes in semi-arid environments." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/27070.

Full text

Abstract:

Soil moisture available to crops is among the main constraints on crop production by smallholder farmers in semi-arid Zimbabwe. Other restrictions, such as limited use of fertilisers and herbicides, stem primarily from socio-economic rather than biophysical constraints. To improve smallholder farming, it is essential to promote soil and water conservation practices (SWC) that consider farmers' management constraints, such as limited availability of labour and Draught Animal Power (DAP).

APA, Harvard, Vancouver, ISO, and other styles

8

Fidelibus, Matthew, Chris Martin, and Jean Stutz. "Contributions of Beneficial Soil Fungi to Drought Stress Tolerance of Young Citrus." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/220566.

Full text

Abstract:

Four arbuscular mycorrhizal (AM) fungal isolates (Glomus sp.) from disparate edaphic conditions were screened for effects on whole -plant transpiration of juvenile 'Volkamer' lemon (Citrus volkameriana Ten. and Pasq.) plants of similar shoot mass and canopy leaf area. Mycorrhizal and non -mycorrhizal plants were grown in 8 -liter containers for 2.5 months under well- watered conditions before subjection to three consecutive soil drying episodes of increased severity (soil moisture tensions of -0.02 [still moist], -0.06 [moderately dry], and -0.08[dry] MPa respectively). Whole plant transpirati

APA, Harvard, Vancouver, ISO, and other styles

9

Traynor, Mary. "Root growth in drying soil : a role for ABA?" Thesis, Lancaster University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322894.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Lindberg, Niklas. "Impact of climate change on soil fauna diversity : effects of experimental drought, irrigation, soil warming and nutrient addition /." Uppsala : Swedish Univ. of Agricultural Sciences, 2001. http://epsilon.slu.se/avh/2001/99-3576673-X.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Mansfield, Thomas. "Influence of soil fertility, drought, and host plant on fine root endophytes along a 2-million-year soil chronosequence." Thesis, Mansfield, Thomas (2019) Influence of soil fertility, drought, and host plant on fine root endophytes along a 2-million-year soil chronosequence. Honours thesis, Murdoch University, 2019. https://researchrepository.murdoch.edu.au/id/eprint/54327/.

Full text

Abstract:

Understanding of fine root endophytes (FRE) (Planticonsortium tenue) ecology and especially the drivers of colonisation, diversity and community assemblage is limited. Field observations suggest that they are specialised to occur within extreme environmental conditions. I investigated the influences of drought (water availability), soil fertility (chronosequence stage) and host species on colonisation (abundance), diversity, and community assemblage of FRE using a glasshouse experiment. I planted seedlings of Microlaena stipoides Labill (weeping grass) and Trifolium subterraneum L. (subterrane

APA, Harvard, Vancouver, ISO, and other styles

12

Ullah, Mohammad Rahmat. "Drought Effects on Soil Carbon and Nitrogen Cycling: Role of Fungi and Bacteria." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25855.

Full text

Abstract:

Drought has serious impact on the stability and fertility of soil systems, but the consequences for soil microbes and functioning remain unclear. Major soil carbon (C) and nitrogen (N) cycling processes such as microbial biomass C (MBC) and N (MBN), respiration, carbon use efficiency (CUE), extracellular enzyme (EE) activity, gross N mineralization (GNM), and N retention were explored in response to drought, biocides and fertilizer treatments in a seminatural Australian grassland soil. Results showed that the abundances and activities of fungi and bacteria across seasons were responsible for l

APA, Harvard, Vancouver, ISO, and other styles

13

Gregory, James. "Soil Moisture Responses in Traditional and Drought Adapted Landscapes in the Intermountain West." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/2.

Full text

Abstract:

Water conservation in the Intermountain West will be an important issue in the future as population and demand for limited water resources increases. In Utah, outdoor water use accounts for up to 60% of total per capita water use with 67% of that outdoor water being used to irrigate non native plant species to maintain a uniform green appearance. The objective of this study was to measure intra landscape changes in soil water potential during a 21.5 day dry down from DOY 215 to 236.5 in the summer of 2005 and 2006. Four, 2 x 2 replicated traditional and drought tolerant landscapes were instrum

APA, Harvard, Vancouver, ISO, and other styles

14

Sehgal, Vinit. "Near Real-time Seasonal Drought Forecasting and Retrospective Drought Analysis using Simulated Multi- layer Soil Moisture from Hydrological Models at Sub- Watershed Scales." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78623.

Full text

Abstract:

This study proposes a stratified approach of drought severity assessment using multi-layer simulated soil moisture. SWAT (Soil and Water Assessment Tool) models are calibrated for 50 watersheds in the South-Atlantic Gulf region of the Southeastern US and a high-resolution daily soil moisture dataset is obtained at Hydrologic Unit Code (HUC-12) resolution for a period of January 1982 through December 2013. A near real-time hydrologic simulation framework by coupling the calibrated SWAT models with the National Centers for Environmental Prediction (NCEP) coupled forecast system model version 2 (

APA, Harvard, Vancouver, ISO, and other styles

15

Potulski, Nicole. "Effects of soil and atmospheric drought on leaf gas exchange rates of plantation palms." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385446.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Barba, Ferrer Josep. "Effects of drought-induced forest die-off and species replacement on soil CO2 effluxes." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/290841.

Full text

Abstract:

L’increment en la freqüència i la intensitat de les sequeres en les últimes dècades s’ha considerat responsable de molts episodis de mortalitat forestal a nivell global, particularment a la regió mediterrània. Els models prediuen un futur encara més càlid i sec per aquesta regió, però es desconeix com aquest decaïment forestal per sequera pot afectar a les emissions de CO2 i a la capacitat d’embornal de carboni (C) dels ecosistemes terrestres. Els sòls, que emmagatzemen dos terços del C dels ecosistemes terrestre, tindran un paper clau en el balanç de C. Aquesta tesi estudia els fluxos de CO2

APA, Harvard, Vancouver, ISO, and other styles

17

Raper, Tyson B. "In-season Drought Monitoring| Testing Instrumentation and Developing Methods of Measurement Analysis." Thesis, University of Arkansas, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3626302.

Full text

Abstract:

<p> Soil moisture sensor use in crop production systems has the potential to give inference on plant water status for the purpose of irrigation scheduling and site-drought characterization. These processed measurements could serve as the framework on which to compile trial results across locations, thereby more accurately defining varietal yield response to drought. Still, the ability to characterize drought within a given field or initiate irrigations from these data hinge upon the ability of the instrument to characterize soil moisture at the sampled point and extrapolate that information

APA, Harvard, Vancouver, ISO, and other styles

18

Stong, Matthew Harold. "Development of Remote Sensing Techniques for Assessment of Salinity Induced Plant Stresses." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194858.

Full text

Abstract:

Salinity has been shown to reduce vegetative growth, crop quality, and yield in agricultural crops. Remote sensing is capable of providing data about large areas. This project was designed to induce salinity stress in a crop, pak choi, and thereafter monitor the response of the crop as expressed by its spectral reflectances. The project was conducted in the National Taiwan University Phytotron, and spectral data was collected using a GER 2600. Yield and soil salinity (ECe) were also measured. After three seasons of data were collected, wavelengths sensitive to salinity were selected. The

APA, Harvard, Vancouver, ISO, and other styles

19

Yan, Hongxiang. "From Drought Monitoring to Forecasting: a Combined Dynamical-Statistical Modeling Framework." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/3292.

Full text

Abstract:

Drought is the most costly hazard among all natural disasters. Despite the significant improvements in drought modeling over the last decade, accurate provisions of drought conditions in a timely manner is still one of the major research challenges. In order to improve the current drought monitoring and forecasting skills, this study presents a hybrid system with a combination of remotely sensed data assimilation based on particle filtering and a probabilistic drought forecasting model. Besides the proposed drought monitoring system through land data assimilation, another novel aspect of this

APA, Harvard, Vancouver, ISO, and other styles

20

Champagne, Catherine. "Evaluation of Agricultural Soil Moisture Extremes in Canada Using Passive Microwave Remote Sensing." Thesis, Taylor and Francis, Elsevier Science, 2010. http://hdl.handle.net/10214/2918.

Full text

Abstract:

This research examines the potential to use passive microwave remote sensing for measuring soil moisture extremes that impact agricultural areas in Canada. A validation was made of three passive microwave remote sensing soil moisture data sets, with weekly averaged values from the Land Parameter Retrieval Model (LPRM) applied to AMSR-E C/X-Band data providing the most accurate results (root mean squared error of 5 to 10%). A further evaluation of this data set against a spatially distributed in situ soil moisture network in Alberta suggests that this data set may be less accurate in regions wh

APA, Harvard, Vancouver, ISO, and other styles

21

Zang, Ulrich Franz [Verfasser], and Werner [Akademischer Betreuer] Borken. "Sensitivity of planted European beech saplings to soil drought / Ulrich Franz Zang. Betreuer: Werner Borken." Bayreuth : Universität Bayreuth, 2014. http://d-nb.info/1060010135/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Saiki, Shintarou. "The variations of drought tolerance along soil depth gradient and the physiological mechanisms of drought-induced and pathogenic tree die-offs in the Bonin Islands." Kyoto University, 2017. http://hdl.handle.net/2433/228226.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

McKellar, Trevor T., and Trevor T. McKellar. "Evaluating How Representative Simple Multiscalar Drought Indices Are of Modeled Soil Moisture Across the Desert Southwest United States." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/622900.

Full text

Abstract:

Drought indices based on monthly precipitation and sometimes temperature are widely used due to their simple calculation with readily available climate data. The portrayal of drought through simple precipitation anomalies or water balances when accounting for temperature may not capture the potentially complex evolution of drought events due to the timing, intensity, and frequency of precipitation events at the daily scale. In this study, we present a new drought index that incorporates a deterministic soil model, HYDRUS-1D, and daily climate data to assess how representative simple drought i

APA, Harvard, Vancouver, ISO, and other styles

24

Asensio, Abella Mª Dolores. "Exchange rates and content of VOCs in Mediterranean soils; their responses to drought and warming and their linkage with biotic factors." Doctoral thesis, Universitat Autònoma de Barcelona, 2007. http://hdl.handle.net/10803/3692.

Full text

Abstract:

Los organismos vivos intercambian gases con la atmósfera. Estos gases llamados Compuestos Orgánicos Volátiles Biogénicos (COVBs) son muy importantes para la química de la troposfera y el ciclo global del carbono. Las plantas producen una gran variedad de hidrocarburos de los cuales el grupo más representativo y abundante son los isoprenoides. El isopreno, los monoterpenos y sesquiterpenos representan una pequeña proporción de esta gran diversidad de productos vegetales dentro del grupo de los isoprenoides. Además de isoprenoides, las plantas emiten otros compuestos orgánicos volátiles, por eje

APA, Harvard, Vancouver, ISO, and other styles

25

Heim, Brett Christopher. "Partitioning soil respiration in response to drought and fertilization in loblolly pine: laboratory and field approaches." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/25757.

Full text

Abstract:

An understanding of ecosystem-level carbon (C) sequestration, or net ecosystem production (NEP), requires the separation of heterotrophic, microbial respiration (RH) from autotrophic, root-derived respiration (RA) as the components of RS (i.e., NEP = NPP - RH). However, separating these two sources in situ has been problematic since they are closely coupled. This study utilizes two similarly aged Pinus taeda L. stands, 8 and 9 years-old, aimed at quantifying these two respiration components through in-situ root severing. In order to use root-severing treatments to separate RS into RH and RA co

APA, Harvard, Vancouver, ISO, and other styles

26

Hess, Linde. "Assessing the drought risk of oilseed rape to target future improvements to root systems." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/4932.

Full text

Abstract:

The yield of UK’s commercial oilseed rape (Brassica napus) crops has not increased over the last three decades, while a significant increase in yield has been found in trials that test new varieties before they enter the market. It has been suggested that oilseed rape is susceptible to drought and that this may contribute to the poor yield of some commercial crops. A thorough literature review revealed that there is little information on the water relations of oilseed rape crops and in particular on root growth and function and thus no strong evidence to support the above hypothesis. The aim o

APA, Harvard, Vancouver, ISO, and other styles

27

Fischer, Phillip Murray. "δ13C as indicator of soil water availability and drought stress in Pinus radiata stands in South Africa". Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6588.

Full text

Abstract:

Thesis (MSc (Forest and Wood Science))--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: This study investigated the use of carbon isotopes as a potential measure for water availability and drought stress in Pinus radiata in the Western and Southern Cape, South Africa. An understanding of water availability and its variation in space is fundamental to the implementation of increasingly site-specific management regimes that have the potential to greatly improve productivity across sites in the region. Fifteen plantation compartments situated on water shedding sites were identified w

APA, Harvard, Vancouver, ISO, and other styles

28

Grau, Andres Roger. "Drought and fuel structure controls on fire severity : effects on post-fire vegetation and soil carbon dynamics." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/7929/.

Full text

Abstract:

Calluna-dominated habitats, including dry heaths and peat bogs, provide important ecosystem services such as biodiversity, soil carbon stores and water supply. Climate change projections estimate drier conditions throughout their range, which could lead to increased wildfire activity. Such altered fire regime could induce a fundamental change to the ecology of Calluna moorlands and increase carbon emissions from their carbon-rich soils. The aim of this research was to understand how ecosystem response varies in relation to increased fire severity in Calluna heathlands and peat bogs. I complete

APA, Harvard, Vancouver, ISO, and other styles

29

von, Rein Isabell. "Plant and soil microbial responses to drought stress in different ecosystems: the importance of maintaining the continuum." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18064.

Full text

Abstract:

Der Klimawandel bedroht Ökosysteme auf der ganzen Welt. Besonders der Anstieg in Länge, Intensität und Häufigkeit von Dürren kann bedeutenden Einfluss auf den globalen Kohlenstoffkreislauf haben. Die Frage, ob Pflanzen und Mikroorganismen anfällig gegenüber ökologischem Stress wie Dürren sind, wurde bereits in vielen Studien für verschiedene Ökosysteme und mit verschiedenen Ansätzen untersucht, aber Analysen von Dürreauswirkungen, die ober- und unterirdische Interaktionen von Pflanzen und Mikroorganismen mit einbeziehen, sind eher selten. Deshalb wird in der vorliegenden Studie die Frage erört

APA, Harvard, Vancouver, ISO, and other styles

30

AMBAW, GASHAW METEKE. "Satellite based remote sensing of soil moisture for drought detection and monitoring in the Horn of Africa." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2507436.

Full text

Abstract:

Drought is a natural hazard characterized by a high degree of complexity thus its investigation could be best performed only through a complex analysis involving a set of environmental variables and their intricate relationships. Therefore, the development of an effective early drought detection and monitoring system requires integration of observations on vegetation condition, climate-based drought index data, and several biophysical and social variables of the environment. One of the fundamental drought variables is of course soil moisture, a key parameter determining crop yield potential

APA, Harvard, Vancouver, ISO, and other styles

31

Lammerant, Roel. "Impact of experimental soil moisture manipulation on tropical tree seedling demographic fates and functional traits." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-436103.

Full text

Abstract:

In tropical regions, climate change is predicted to lead to increased drought frequency and intensity. The extent to which this will shift the functional diversity of tropical tree communities is unknown due to a limited understanding about the response of seedlings to variable soil moisture. We addressed this issue using an experimental approach in the Luquillo Experimental Forest, Puerto Rico. We exposed seedlings of eight tree species, representing different successional stages, to an experimental soil moisture gradient. We evaluated (1) How species mean trait values relate to species-speci

APA, Harvard, Vancouver, ISO, and other styles

32

Nsiah-Gyabaah, Kwasi. "Environmental degradation and the threat of drought and desertification in the upper west region of Ghana : a search for sustainable development solutions." Thesis, Imperial College London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271549.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Jalili, Adel. "An investigation of the influence of drought and other soil factors on the structure of a calcareous grassland." Thesis, University of Sheffield, 1991. http://etheses.whiterose.ac.uk/1871/.

Full text

Abstract:

Previous experimental investigations (Grime & Curtis 1976; Hillier 1984), and long term climatic monitoring (Rorison et al 1986a,b) have revealed the frequent occurrence of drought during the summer period in calcareous grassland on the south-facing slopes of limestone dales in the Peak District of North Derbyshire, Northern England. The main objective of the studies in this thesis was to examine the role of drought as a determinant of the characteristics of one selected calcareous grassland system at Tongue End in Millersdale. Particular attention has been given to the interaction of drought

APA, Harvard, Vancouver, ISO, and other styles

34

Bacon, Mark A. "The control of leaf expansion in Lolium temulentum L. and Hordeum vulgare L. growing in drying soil : an investigation of the role of xyloglucan endotransglycosylase, cell wall-associated peroxidase activity, pH and ABA." Thesis, Lancaster University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268117.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Jenkinson, Joseph. "Using next generation sequencing to assess soil microbial communities associated with drought, biochar and land use change to bioenergy." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/401042/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Dougherty, John Paul. "Three Essays on the Economic Sustainability of Drought Insurance and Soil Investment for Smallholder Farmers in the Developing World." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1531672015876609.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Chen, Jingjing. "Water repellency effects on liquid- and vapor-phase water exchange in soil and clay minerals." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/87583.

Full text

Abstract:

Drought conditions and wildfires can induce soil water repellency. Precipitation shifts are expected to exacerbate drought and wildfire in regions such as the southeastern United States, making it critical to understand how repellency affects water exchange processes in soil. The objectives of this dissertation were to 1) quantify the water vapor sorption dynamics of two clay minerals in which water repellency was induced; 2) identify if and for how long wildfires in humid hardwood forests induce water repellency, 3) evaluate if organic carbon content and hydrophobic functional groups explain

APA, Harvard, Vancouver, ISO, and other styles

38

Noronha, Sannervik Angela. "Modelling productivity of willow stands in Sweden : evaluation of concepts for radiation use efficiency and soil water and nitrogen availability /." Uppsala : Dept. of Short Rotation Forestry, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s286-ab.html.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Bueno, Carmen. "Effects of Drought on the Survival of Rhizobium leguminosarum Biovar trifolii and the Nodulation of Subterranean Clover in an Acid Soil." DigitalCommons@USU, 1987. https://digitalcommons.usu.edu/etd/3468.

Full text

Abstract:

Twenty-nine Rhizobium leguminosarum biovar trifolii strains were tested for acidity tolerance in acidified liquid medium. Only 41\ of the strains grew at pH 4.1. One acid-tolerant strain, USDA 2160, and one acid-sensitive strain, 162-X-103 from Nitragin Co., were inoculated on seeds of 'Nungarin', 'Seaton Park' and 'Clare' subclover cultivars. The inoculated and pelleted seeds were sown in potted Cluff soil with pH 5. 7. Three desiccation levels were imposed by delaying watering for 0, 15 or 30 days. Four gravimetric soil water contents (6.0, 6.6, 10.5 and 12.5\) were maintained under a greenh

APA, Harvard, Vancouver, ISO, and other styles

40

Ouk, Makara. "Genotypic differences in adaption to late season drought and infertile soil in rainfed lowland rice (Oryza sativa L.) in Cambodia /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17398.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Vova, Oyudari [Verfasser]. "Assessment of Drought in Grasslands: Spatio – Temporal Analyses of Soil Moisture and Extreme Climate Effects in Southwestern Mongolia / Oyudari Vova." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2021. http://d-nb.info/1236401786/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Brewer, Robert Wayne. "Summer Regional United States Diurnal Temperature Range Variability With Soil Moisture Conditions." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1428939308.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Semon, Mande 1957. "Interplot and intraplot border effects on maize genotypes under two levels of moisture availability." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276817.

Full text

Abstract:

The performance of three maize (Zea mays L.) hybrids, grown under two irrigation levels, was used to investigate the effects of soil moisture competition between adjacent plots, the transmission of these effects into multi-row adjacent plots and types of multi-row plots and plot borders most effective in shielding from these interplot competition effects. On the basis of grain yield, competition effects intended to the second rows of five-row plots necessitating more than five-row plots to accurately evaluate the full transmission of interplot competition effects into adjacent plots. Evaluatio

APA, Harvard, Vancouver, ISO, and other styles

44

Wongareonwanakij, Sathaporn. "Effects of water stress and partial soil-drying on senescence of sunflower plants." Title page, contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09A/09aw872.pdf.

Full text

Abstract:

Bibliography: leaves 98-123. This thesis investigates the symptoms of leaf senescence in response to plant shoot water stress and demonstrates the effect of a non-hydraulic root signal in the senescence response of mature leaves of sunflower. The alleviation of the leaf soluble protein loss rate by excision of the root system in drying soil indicates that this signal originates in roots in dry soil and acts to promote protein loss.

APA, Harvard, Vancouver, ISO, and other styles

45

Goble, Peter. "Maximizing the utility of available root zone soil moisture data for drought monitoring purposes in the Upper Colorado River Basin and western High Plains, and assessing the interregional importance of root zone soil moisture on warm season water." Thesis, Colorado State University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10139009.

Full text

Abstract:

<p> Root Zone Soil Moisture (RZSM) data have both drought monitoring and seasonal forecasting applications. It is the lifeblood of vegetation, an integral component of the hydrologic system, a determining factor in irrigation requirements, and works to govern the means by which energy imbalances are settled between land and atmosphere. The National Integrated Drought Information System (NIDIS) has worked in conjunction with the Colorado Climate Center to improve regional drought early warning through enhanced monitoring and understanding of RZSM. The chief goals of this research have been as f

APA, Harvard, Vancouver, ISO, and other styles

46

Toräng, Per. "Pollinators, Enemies, Drought, and the Evolution of Reproductive Traits in Primula farinosa." Doctoral thesis, Uppsala universitet, Växtekologi och evolution, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8207.

Full text

Abstract:

In this thesis, I combined comparative and experimental approaches to examine selection on reproductive traits and population differentiation in the insect-pollinated, self-incompatible, perennial herb Primula farinosa. More specifically, I (1) determined whether the effects of floral display and interactions with pollinators and seed predators, and plant reproductive success were frequency-dependent and affected by surrounding vegetation context, (2) examined the consequences of intermittent drought years on population dynamics using numerical simulations based on demographic data collected o

APA, Harvard, Vancouver, ISO, and other styles

47

Rosa, Ricardo Granés Tavares Duarte. "Índices de seca. Aplicação ao continente português." Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/4488.

Full text

Abstract:

Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia<br>The Palmer Drought Severity Index (PDSI) was tested along with two indices resulting from modifying its original formulation, one concerning the replacement of the Thornthwaite equation to compute potential evapotranspiration (ETP) by the FAO Penman-Monteith method, and the other consisting in replacing the soil water balance model and the ETP computation that passes to correspond to the ETP of an olive orchard, generating a new index: the MedPDSI. A factor for the normalization of the index, the climate characteristic (K),

APA, Harvard, Vancouver, ISO, and other styles

48

George, Eckhard [Gutachter], Michael [Gutachter] Bahn, and Arthur [Gutachter] Gessler. "Plant and soil microbial responses to drought stress in different ecosystems: the importance of maintaining the continuum / Gutachter: Eckhard George, Michael Bahn, Arthur Gessler." Berlin : Humboldt-Universität zu Berlin, 2017. http://d-nb.info/1190292556/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Feaga, Jeffrey Brian. "Wetland hydrology and soils as components of Virginia bog turtle (Glyptemys muhlenbergii) habitat." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/30113.

Full text

Abstract:

Reptile populations are in decline worldwide, with turtle species showing some of the largest drops in population. The bog turtle (Glyptemys muhlenbergii) is considered one of the rarest North American turtle species, and this rarity is made more severe by anthropogenic factors. The wetland habitats that are used by bog turtles contain seepage areas and soil saturation that are characteristic of specific types of wetlands, suggesting that bog turtle rarity may in part be attributed to narrow habitat requirements. In this dissertation, I have sought to spatially and temporally characterize t

APA, Harvard, Vancouver, ISO, and other styles

50

Alavi, Ghasem. "Climate, leaf area, soil moisture and tree growth in spruce stands in SW Sweden : field experiments and modelling /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5710-6.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!