Yahia Othman

Yahia Othman
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Yahia verified their affiliation via an institutional email.
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Yahia verified their affiliation via an institutional email.
University of Jordan | UJ

Professor

About

100
Publications
57,483
Reads
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1,523
Citations
Introduction
Yahia Othman currently works at the Department of Horticulture and Crop Science, University of Jordan. His research focus on stress physiology,land degredation, restoration, remote sensing (Unmanned Aerial Vehicle, spaceborn) of vegetation, rangeland management, forestry, and soilless culture (hydroponics).
Additional affiliations
September 2016 - present
University of Jordan
Position
  • Professor (Associate)
Description
  • Forestry, Biodiversity, rehabitation, soilless culture and remote sensing
July 2014 - December 2016
Texas A&M University
Position
  • Research Associate
September 2006 - July 2010
Arabian Gulf University
Position
  • Research Assistant

Publications

Publications (100)
Article
Full-text available
Remote-sensing techniques can detect and up-scale leaf-level physiological responses to large areas, and provide significant and reliable information on water use and irrigation management. The objectives of this study were to screen leaf-level physiological changes that occur during the cyclic irrigation of pecan orchards to determine which respon...
Article
The objective of this study was to assess the influence of plant- and animal-based soil amendments on soil nutrient availability, CO2 respiration, yield and phytochemicals of artichoke (Cynara cardunculus cv. 179) heads. Four certified organic fertilisers: fish meal, blood meal, alfalfa meal and chicken manure, were used as experimental treatments....
Article
Full-text available
The present article reviews the scientific literature on soilless culture and provided a critical examination of the micro-environmental factors that can affect horticultural crop growth and productivity, including , soilless substrate, fertigation solution, salin-ity, nutrient content and pH and plant-microorganism interaction. In addition, the ro...
Article
Full-text available
Healthy soil acts as a dynamic living system that delivers multiple ecosystem services, such as sustaining water quality and plant productivity, controlling soil nutrient recycling decomposition, and removing greenhouse gases from the atmosphere. Soil health is closely associated with sustainable agriculture because soil microorganism diversity and...
Article
Full-text available
The objective of this study was to evaluate the separability potential of Sentinel-2A (MultiSpectral Instrument, MSI) and Landsat (Operational Land Imager, OLI and Thermal Infrared Sensor, TIRS) derived indices for detecting small-extent (70%. In fact, the dNBR-Sentinel-2/Landsat-8 overall accuracy and Kappa coefficient for classifying fire severit...
Article
Full-text available
Saline water irrigation presents a significant challenge in agriculture, especially in regions with water scarcity and soil salinity. Lilies are economically significant ornamental plants renowned for their aesthetic value and commercial importance. This study aims to evaluate the effects of saline water irrigation on lily anatomy, physiology, and...
Article
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Precision field management and modeling crop growth requires precise, efficient , timely, nondestructive, and cost-effective measurements of structural component including leaf area index (LAI) and leaf orientation based on the foliage mean tilt angle (MTA), which is defined as the average leaf inclination angle of a canopy. Two experiments were ca...
Article
Full-text available
Garlic (Allium sativum L.) is an important vegetable crop that is consumed worldwide. Bulb quality as source of minerals and health-promoting bioactive compounds considered an important attribute for nutritional and medicinal properties that have positive effects on human health. This study aimed to investigate the growth response, mineral and phyt...
Article
Full-text available
This research aimed to study the ecological context of Puccinia coronata f. sp. avenae (Pca), a pathogen affecting oats, in Jordan. The region is identified as a natural habitat for various wild oat species and the Rhamnaceae family, serving as an alternative host for Pca. The prolonged coexistence of the pathogen, wild oats (Avena spp.), and Rhamn...
Article
Full-text available
Roses are increasingly being grown in soilless systems to increase productivity and reduce the challenges associated with soil-based cultivation. This study investigates the effects of using cocopeat and volcanic tuff substrates, the particle size of tuff, and substrate depth on the growth and flower quality of roses (Rosa hybrida L. cv. top secret...
Article
Full-text available
The global cut flower industry, including lilies, represents a highly promising investment. Therefore, improving the quantity and quality of these commercially significant flower species is crucial. The objectives of this study were to (1) evaluate the influence of different pre-harvest chemical compounds on endogenous GA3, phenol, flavonoids and t...
Article
Full-text available
Finding environmentally friendly solutions for crop growth and productivity has been gaining more attention recently. This meta-analysis aims to understand the combined application of arbuscular mycorrhizal fungi (AMF) and hydroponic systems compared to AMF in conventional (soil) systems. The analysis of up-to-date studies revealed that the root co...
Article
Full-text available
Conservation of endangered plant species in their indigenous regions is of crucial importance, especially for those grown in semi-arid regions. The objectives of this study were to explore the Nazareth iris’s (Iris bismarckiana) natural habitat and identify new suitable sites to initiate a reintroduction program of this endangered plant species in...
Article
Full-text available
We assessed the influence of postharvest pulsing solutions pH and composition on cut flower quality of rose (Rosa hybrida cvs. Avalanche and Black Magic), gerbera (Gerbera jamesonii cv. Beaudine) and lily (Lilium × elegans cv. Fangio) under room (20±2 °C) and cold storage (4±1 °C) conditions. Cut flowers were placed in different acidic (pH, 3.5 - 4...
Article
Full-text available
Healthy forests are essential to human life because they provide food, energy, and other benefits including carbon sequestration. The objective of this study was to assess the forests health status in Mediterranean ecosystems, specifically, arid to semi-arid. Four forest reserves directed by Royal Society for the Conservation of Nature, Jordan were...
Article
Plant growth regulators (PGRs) are chemical compounds that can potentially stimulate cut flowers growth and development and play key regulatory roles in plant responses to the surrounding environment. The aim of this study was to assess how the application of five PGRs; 6-Benzylaminopurine (BA, cytokinins), indole-3-acetic acid (IAA, auxins), gibbe...
Article
Full-text available
Soil and irrigation water salinity are major limiting factor to citrus industry in arid environments. The objective of this study was to assess the effects of different salt stress levels on growth and ion uptake of three-month-old citrus rootstocks; sour orange (Citrus aurantium) and Volkamer lemon (Citrus volkameriana). Six levels of NaCl-salini...
Article
Biostimulants containing amino acids and minerals have been used commercially to promote plant growth, yield and nutritive value of food crops. Limited studies on biostimulants application are available on lettuce production in soilless systems. This research was conducted to determine the effects of foliar application of amino acids biostimulants...
Article
Full-text available
Skin separation (puffiness) is a critical physiological disorder that significantly reduces the date palm (Phoenix dactylifera L.) fruit’s visual appearance and quality. The objectives of this study were to analyze fruit anatomy in skin-separated and normal date palm (var. Mejhoul) fruit and to assess the microclimatic conditions (temperature and r...
Article
Full-text available
Lawns achieve environmental, functional, and aesthetical roles in urban environments. The objectives of this research were to assess the effect of different salinity levels on Trichoderma isolates and to study the effect of Trichoderma spp. on perennial ryegrass under different levels of salinity. T. harzianum (ThLem2017-01) and T. atroviride (TaDP...
Article
Full-text available
Lily species are considered one of the most important cut flowers worldwide. With annual production of 282 million flowers and total value of $200 million, lily is among the top five cut flower species auctioned in the international flower stock markets. The objective of this study was to assess the effect of different planting depths on morphology...
Article
Full-text available
Strawberries (Fragaria ananassa Duch.) are grown in Jordan year round due to the diversity of climatic conditions and the possibility of growing local or foreign varieties. More than six thousand greenhouses are planted with strawberries in the highlands and the Jordan Valley. About 12 thousand tons of strawberry are produced annually and 2000 tons...
Article
Applications of gibberellic acid (GA3) during the vegetative stage is used routinely in artichoke production systems in semi-arid regions to induce vernalization and improve yield. The objective of this two-year field study was to evaluate the effect of exogenous GA3 (20 mg l⁻¹) application date (4th and 8th leaf stages) and frequency (two and thre...
Chapter
Full-text available
Legumes are grown in more than 120 countries across all the continents. 90% of the global production of legume are produced in small group of countries such as India, Turkey, Pakistan, Bangladesh, Nepal, Iran, Mexico, Myanmar, Ethiopia, Australia, Spain, Canada, Syria, Morocco and Egypt. Legume are vegetarian sources of proteins and are an integral...
Article
The objective of this two-year field study was to assess the effects of controlled-nitrogen (N) fertilizers releasing speed and rates on tree morphology, physiology, yield and fruit quality of apricot (Prunus armeniaca cv. Mogador). In this study, four different releasing speed (conventional: < 1 month, controlled-release: 3, 6 and 9 months) and th...
Article
We assessed vegetation cover density and distribution in Eastern Jordanian rangeland reserves (2411 km²) using a series of Landsat images (34 year's period) and ground cover survey (2020) to identify proper sites for reintroducing Arabian Oryx (Oryx leu-coryx). The natural reserves were Burqu Nature Reserve site-1, and site-2 (Dmetheh), and Al Dahe...
Article
Full-text available
Polyethylene mulch is widely used for vegetable production in the United States as a tool to conserve water, control weeds, and produce earlier and cleaner products (i.e., less attached soil). However, the increasing labor costs for mulch removal and disposal after harvest and soil environmental pollution are major concerns. The objective of this s...
Article
Full-text available
Citation: Othman, Y.A.; Al-Assaf, A.; Tadros, M.J.; Albalawneh, A. Heavy Metals and Microbes Accumulation in Soil and Food Crops Irrigated with Wastewater and the Potential Human Health Risk: A Metadata Analysis. Water 2021, 13, 3405. https://
Article
We evaluated the fire severity and recovery process of the Latroon dry forest in Jordan following the 2003 fire. A series of multi-temporal Landsat-ETM + data and the delta normalized burn ratio (dNBR) were used to map the fire severity immediately following the fire and 1,5,9,13 and 17 years after. In addition, combined field morpho-physiological...
Article
To explore the effect of COVID-19 pandemic lockdown on vegetation cover changes in Northern, Middle, and Eastern Jordan Badia range-lands, Landsat-8 (Operational Land Imager [OLI]) images were down-loaded and processed to attain surface reflectance data for March and July 2018-2020. Normalized difference vegetation index (NDVI) was then derived fro...
Article
2021): Influence of nitrogen source on physiology, yield and fruit quality of young apricot trees, Journal of Plant Nutrition, ABSTRACT The objective of this two-year study was to assess the effect of N source on plant physiology, yield and fruit quality of apricot (Prunus armeniaca 'Mogador') trees. Parameters evaluated included: gas exchange [pho...
Article
Full-text available
The objective of this two-year field study was to assess the influence of stand establishment methods (direct seeding or transplanting) on root growth dynamics, shoot morphology, leaf physiology, yield, and quality of globe artichoke (Cynara cardunculus). Three artichoke cultivars were evaluated, ‘Green Globe Improved’ (GGI), ‘Imperial Star’ (IS),...
Technical Report
Full-text available
A Tailor-made training (TMT), financed by the Nuffic-OKP and executed by the University of Twente / Faculty ITC, sought to provide the University of Jordan (UJ) with the understanding of these processes in the context of Jordan and disseminate this knowledge and verified improved practices through our University curricula and partnerships with spec...
Article
Full-text available
The objective of this study was to assess the influence of different foliar gibberellic acid (GA 3) levels (0, 10, 50, and 200 mg L-1) and application timing on the growth, physiology (chlorophyll and gas exchange) and flower quality of gerbera (Gerbera jamesonii cvs. Beaudine and Palm Beach) and Asiatic lily (Lilium × elegans cvs. Fangio and Eldiv...
Article
Full-text available
Plant physiologists use leaf area index (LAI) as an essential tool to predict vegetation cover, growth and yield. The objective of this two-year study was to determine whether multispectral reflectance indices derived from Landsat 7 Enhanced Thematic Mapper (ETM+) can estimate LAI of pecan (Carya illinoinensis Wangenh. C. Koch) orchards. The study...
Article
Full-text available
This study investigated the influence of treated greywater on growth and protein content of multipurpose (forage and ornamental) transplants, Prosopis juliflora L., Prosopis tamarugo L., and Albizia lebbeck L. Transplants of tested species were irrigated with treated greywater, diluted greywater (grey + distilled water, 1:1/by volume), and distille...
Article
Water harvesting techniques have shown promising outcomes in mitigating risks, increasing yields and delivering positive influences on other ecosystems. A field study was conducted in Northern Jordan to assess the influence of combined in-situ water harvesting techniques, micro-catchment and mulching on soil moisture content, plant morphology, gas...
Book
Full-text available
The motivating factor for thinking of writing this book in its three volumes comes first of all from the need of the students of the program: Landscape Horticulture and Cut Flower Production in the Department of Horticulture, School of Agriculture at The University of Jordan. We tried to do our best to identify a suitable text for the classes we te...
Article
Full-text available
Invasions by invasive alien species (IAS) are recognized as one of the largest threats to earth's ecosystem services and represent rapidly growing economic costs as they damage local ecosystems and force surrounding communities to divert resources towards IAS management and control. The study objectives were to assess the economic impacts of a Pros...
Article
Full-text available
Invasive plant species (IPS) affect people's livelihoods and well-being by providing both benefits and costs in different contexts. The objective of this study was to investigate the impact of Prosopis juliflora invasion on land cover change using ground survey and satellite sensor data derived from Landsat ETM+. The study was conducted at Sweimeh,...
Article
Full-text available
The objectives of this study were to evaluate the effect of foliar potassium (K) application on yield and fruit quality of 'Medjool' date palm. Five different levels of potassium (0 as control, 800, 1600, 3200, and 4000 mg. L-1 K) were used. Potassium were applied as a foliar treatment in 3 doses over the study period (May, June and July) at a rate...
Article
The objective of this two-year study was to assess the influence of using a leguminous crop, Sesbania grandiflora, on soil nutrient levels (NO3, P, K, Ca2+, Mg2+, Na and S), pH, EC, soil organic matter (OM) and respiration. Sesbania seeds were planted in a certified organic field in March at a planting density of 50 kg ha-1 in 2015 and 90 kg ha-1 i...
Article
Organic farming systems contribute to enhance food security and agricultural sustainability. with the potential to increase farmer’s income when external input costs are reduced. Two experiments were conducted to evaluate the influence of organic farming on soil quality (respiration-CO2), yield and head quality (chlorogenic acid and cynarin concent...
Article
The objectives of this research were to assess the physical properties of six different growing substrate mixtures destined for roof gardens and determine the influence of these substrates on the morphology, physiology, growth and flower quality of pansy (Viola × wittrockiana), Madagascar periwinkle (Catharanthus roseus), and Pavia lily (Longifloru...
Conference Paper
Full-text available
In this review, we discuss the relationship between environmental crop management and adaptation to warming climates of legume plants and plant breeding, for drought tolerance. The benefits connected to the impact of the expansion of appropriate legumes-based agriculture for arid zones are analyzed. We need to two aims to develop 2 programs of bree...
Article
Full-text available
The present article reviews the scientific literature on the influence of organic and conventional farming as well as organic fertilizer source (plant-based vs. animal-based) on soil health. Additionally, the role of tillage practices (conservational vs. conventional) in soil performance is studied. Research shows that organic farming systems poten...
Article
Cut flower farmers use different substrates for lily production. They are always querying about which growing substrate can improve flower quality of lilies. The aim of this research was to assess the effect of different growing substrates (soil and soilless) on leaf physiology and flower quality of Asiatic lily (Lilium ×elegans Thunb.) ‘Ercolano’...
Article
Full-text available
The objectives of this study were to evaluate the effect of foliar potassium (K) application on yield and fruit quality of 'Medjool' date palm. Five different levels of potassium (0 as control, 800, 1600, 3200, and 4000 mg. L-1 K) were used. Potassium were applied as a foliar treatment in 3 doses over the study period (May, June and July) at a rate...
Article
Full-text available
Pesticides is considered one of the most hazardous compounds that caused serious health implications to man and environment. However, their use is perquisite to guarantee a high yield especially , for greenhouse cucumber production. In fact, the process success depend on spraying coverage, rate and early detection of infection symptoms. In this stu...
Article
Full-text available
Lily growers adapt intensive fertigation programs to produce superior flowers, which raises substrate salinity and input cost. Soil salinity negatively impact growth and productivity and lead to several environmental problems. The objective of this study was to evaluate the effectiveness of K + (applied as K2SO4 drench application) in ameliorating...
Article
Full-text available
This is the first study on the relatively good performance of 42 carrot genotypes which grown in pots under open field conditions. Physical and chemical properties such as, shoot length, number of shoots, root length and diameter, texture, firm-ness and total soluble solid were examined and shown a significantly different among the 42 carrot genoty...
Article
Full-text available
We explored the relationship between hyper-spectral surface reflectance data derived from a handheld spectroradiometer and foliar chlorophyll content of pecans. Canopy scale hyperspectral remotely sensed data and foliar chlorophyll content determined with SPAD meter were collected simultaneously from two mature pecan orchards for two years. One pec...
Article
Full-text available
Domestic gardens are the major contributor to greening the spatial plan in some compact cities. Irbid, Jordan is a densely populated city that has limited and deteriorating natural vegetation and is located in an arid to semi-arid climate. We investigated the density of domestic gardens (proportion of gardened residential units) in Irbid city and e...
Article
Full-text available
ALCACHOFA Sistema y prácticas de manejo para la producción orgánica de la alcachofa Impacto en la calidad y en el rendimiento Realizamos un estudio de 2 años para evaluar el rendimiento de la alcachofa (Cynara cardunculus), la calidad del capítulo (concentraciones de ácido clorogénico y cinarina) y las propiedades químicas del suelo bajo diferentes...
Article
Nitrogen (N) status in olive trees is critical to develop several developmental mechanisms that control shoot, root and nutrient uptake capacity. The objective of this field study was to assess the effect of N level and form on root growth dynamics, shoot growth, leaf-level gas exchange [photosynthesis (Pn), transpiration (E), and stomatal conducta...
Article
Full-text available
The influence of different drying methods on chemical and physical characteristics of date palm (Phoenix dactylifera L. cv. Medjool) fruits was assessed. Drying methods were natural(control), sun, fan, and forced warm air.Fruit moisture content prior drying ranged between 30 and 60%. Fruit from natural dryinghad lighter color, lower firmness and op...
Article
The impact of nitrogen application on the growth of olive trees has been well studied. However, little is known about the role of levels and forms of N on the development of roots and physiological traits during establishment of young trees. The objective of this 2-year study was to evaluate the influence of N source and level on shoot morphology (...
Article
Full-text available
The objective of this study was to assess the effect of foliar application of gibberellic acid (GA3) on strawberry (Fragaria × ananassa Duch cvs. 'BG4.370' and ' Splendor') morphology, physiology [photosynthesis rate (Pn), stomatal conductance (gs) and transpiration (E)], yield, and fruit total soluble solids. Five different GA3 levels were used; c...
Article
Leaf-level physiology, yield, and fruit quality of two strawberry (Fragaria × ananassa Duch.) cultivars, “BG4.370” and “Splendor” grown in five growing substrates were assessed. Substrate ratios were T1: tuff (0–4 mm), T2: cocopeat + perlite 4:1, T3: peatmoss + perlite 4:1, T4: tuff + cocopeat 4:1, and T5: tuff + peatmoss 4:1. Strawberry parameters...
Article
Full-text available
Soil amendment using organic fertilizer has been used widely to dispose animal waste, reduce environmental pollution and improve soil and fruit quality. The objective of this two-year study was to assess the influence of organic and conventional systems on growth, marketable yield, head quality (chlorogenic acid and cynarin concentration) and soil...
Article
Full-text available
Soil amendment using organic fertilizer has been used widely to dispose animal waste, reduce environmental pollution and improve soil and fruit quality. The objective of this two-year study was to assess the influence of organic and conventional systems on growth, marketable yield, head quality (chlorogenic acid and cynarin concentration) and soil...
Article
Full-text available
Plastic house shading could have unpredictable effects on plant growth, fruit quality, production and insect pest infestation. A plastic house experiment was conducted in Jordan Valley in Jordan to assess the impact of two shading treatments on cucumber yield production, quality and pest populations. Shading treatments were green shadow (GS), plast...
Article
The influence of population growth and Syrian refugee settlements on rangeland degradation in Jordan using remotely-sensed data was assessed. Eleven cloud-free Landsat 8 Operational Land Imager (OLI) Images that cover the study area were used. Maximum likelihood classifier was applied to estimate rangeland, cropland, urban, water and forest cover p...
Article
We evaluated the relationships among three Landsat Enhanced Thematic Mapper (ETM+) datasets, top-of-atmosphere (TOA) reflectance, surface reflectance Climate Data Records (surface reflectance-CDR)and atmospherically corrected images using Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes model (surface reflectance-FLAASH) and their lin...
Article
The ethylene inhibitor 1-methylcyclopropene (1-MCP) is commonly used to increase the shelf life of fruits. However, the application of 1-MCP to modulate the shoot growth of vegetable transplants is unknown. The objective of this study was to assess the influence of 1-MCP on improving the growth and quality of tomato transplants. Eight tomato cultiv...
Article
Full-text available
This research was aimed at assessing the impact of different doses of nutrients on growth and flower quality of the Asiatic hybrid Lilium ((Lilium × elegans Thunb.) cv. ‘Fangio’) under the soilless culture. Five nutrient (fertigation) regimes were applied (T1: daily, T2: twice a week, T3: weekly, T4: twice a month and T5: control). Increasing the n...
Article
Full-text available
Soilless substrates enhance growing environment, nutrient content, and water quality in the growing medium. The objective of this study was to assess the influence of substrate particle size on growth and flower quality (flower number and length per plant) of two asiatic hybrid lily (Lilium ·elegans) cultivars Fangio and Ercolano. Plants were grown...
Article
Full-text available
Rising awareness over the environmental impacts of some commonly used materials such as peat-based growing media has urged researchers to assess more environmentally friendly products. The aim of this study was to evaluate the effect of two soilless substrates [tuff (granulated volcanic material, 0-4 mm) and 2:1 peatmoss+perlite (2:1 P+P)] on growt...
Article
Tillage practices are critical for sustaining soil quality necessary for successful crop growth and productivity. A three-year study (2012–2014) was carried out to evaluate the influence of strip and conventional tillage practices and three water status levels [T1 = 100% of evapotranspiration (ET) demands, T2 = 0.75T1and T3 = 0.5T1] on plant morpho...
Article
Full-text available
Effective nutrition and irrigation are important nursery strategies to produce high-quality seedlings able to withstand heat and drought stress in the field. The objectives of this study were 2-fold, first to identify the influence of two nitrogen (N) levels (75 and 150 mg·L−1) and two fertigation (FR) methods, overhead (OH) and flotation (FL) of a...
Article
Full-text available
For large fields, remote sensing might permit plant low moisture status to be detected early, and this may improve drought detection and monitoring. The objective of this study was to determine whether canopy and soil surface reflectance data derived from a handheld spectroradiometer can detect moisture status assessed using midday stem water poten...
Conference Paper
Polyethylene mulch is widely used for vegetable production in the U.S as a tool to conserve water, control weeds and produce earlier and cleaner products. However, the increasing labor costs for mulch removal and disposal after harvest, and air and soil environmental pollution are major concerns. The objectives of this study were to assess yield, f...
Conference Paper
Deficit irrigation has been used as an agricultural water management strategy to maximize water productivity in vegetable crops worldwide. Eight pepper (Capsicum spp.) cultivars in four distinctive groups differing in pungency levels (Serrano: Diablo and Alcon; Jalapeno: TAMU-JAL and TAMU-J222; Bell: 81447 and S1122; and Habanero: TMH and TAM-Orang...
Conference Paper
Stand establishment of artichoke transplants during late summer or early fall is challenging in hot and semi-arid growing regions of the southern United States. A repeated greenhouse experiment evaluated artichoke [Cynara cardunculus L. var. scolymus (L.) Fiori cv. Green Globe Improved] transplants at two nitrogen (N) levels (75 and 150 mg·L-1) and...
Article
Full-text available
Demand for New Mexico’s limited water resources coupled with periodic drought has increased the necessity for tree water status monitoring to guide irrigation scheduling of pecan (Carya illinoinensis) orchards. The objectives of this study were to assess the impact of water status developed during the flood irrigation dry-down cycles on photosynthe...