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Articles 1 - 30 of 148
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Cover Crop Effect On Subsequent Wheat Yield In The Central Great Plains, David C. Nielsen, Drew J. Lyon, Robert K. Higgins, Gary W. Hergert, Johnathon D. Holman, Merle F. Vigil
Cover Crop Effect On Subsequent Wheat Yield In The Central Great Plains, David C. Nielsen, Drew J. Lyon, Robert K. Higgins, Gary W. Hergert, Johnathon D. Holman, Merle F. Vigil
David C. Nielsen
Crop production systems in the water-limited environment of the semiarid central Great Plains may not have potential to profitably use cover crops because of lowered subsequent wheat (Triticum asestivum L.) yields following the cover crop. Mixtures have reportedly shown less yield-reducing effects on subsequent crops than single-species plantings. This study was conducted to determine winter wheat yields following both mixtures and single-species plantings of spring-planted cover crops. The study was conducted at Akron, CO, and Sidney, NE, during the 2012–2013 and 2013–2014 wheat growing seasons under both rainfed and irrigated conditions. Precipitation storage efficiency before wheat planting, wheat water use, …
Cover Crop Biomass Production And Water Use In The Central Great Plains, David C. Nielsen, Drew J. Lyon, Gary W. Hergert, Robert K. Higgins, Johnathon D. Holman
Cover Crop Biomass Production And Water Use In The Central Great Plains, David C. Nielsen, Drew J. Lyon, Gary W. Hergert, Robert K. Higgins, Johnathon D. Holman
David C. Nielsen
The water-limited environment of the semiarid Central Great Plains may not produce enough cover crop biomass to generate benefits associated with cover crop use in more humid regions. There have been reports that cover crops grown in mixtures produce more biomass with greater water use efficiency than single-species plantings. This study was conducted to determine differences in cover crop biomass production, water use efficiency, and residue cover between a mixture and single-species plantings. The study was conducted at Akron, CO, and Sidney, NE, during the 2012 and 2013 growing seasons under both rainfed and irrigated conditions. Water use, biomass, and …
Capillary Wick Irrigation For A Pot From A Reservoir, David A. Bainbridge
Capillary Wick Irrigation For A Pot From A Reservoir, David A. Bainbridge
David A Bainbridge
Capillary wicks are very effective for watering container plants. Ideal for water wise gardens, landscaping and interior plants capes.
Upgrade A Hanging Basket With A Capillary Wick Irrigation System, David A. Bainbridge
Upgrade A Hanging Basket With A Capillary Wick Irrigation System, David A. Bainbridge
David A Bainbridge
Capillary wicks can improve health and performance of container plants. Plants in hanging baskets benefit from steady and very efficient water supply from a reservoir.
Cover Crop Mixtures Do Not Use Water Differently Than Single-Species Plantings, David C. Nielsen, Drew J. Lyon, Gary W. Hergert, Robert K. Higgins, Francisco J. Calderon, Merle F. Vigil
Cover Crop Mixtures Do Not Use Water Differently Than Single-Species Plantings, David C. Nielsen, Drew J. Lyon, Gary W. Hergert, Robert K. Higgins, Francisco J. Calderon, Merle F. Vigil
David C. Nielsen
Recent recommendations advocating the use of cover crop mixtures instead of single-species in semi-arid environments require rigorous scientific studies. One of those stated benefits is greatly reduced water use by cover crops grown in mixtures. The objectives of this study were to characterize soil water extraction patterns and determine water use of cover crops grown in single species plantings and in a 10-species mixture and to compare cover crop water use to evaporative water loss from no-till fallow. The study was conducted at Akron, CO, and Sidney, NE, during the 2012 and 2013 growing seasons on silt loam soils. At …
Modeling Grain Yield And Straw Yield Of Wheat Using Back Propagation And Genetic Algorithm, Omar Maghawri Ibrahim Hassan Dr.
Modeling Grain Yield And Straw Yield Of Wheat Using Back Propagation And Genetic Algorithm, Omar Maghawri Ibrahim Hassan Dr.
Dr. Omar Maghawri Ibrahim
The first objective of this study was to model the effect of yield components, number of grain/spike, number of spikes/m2, and 1000 kernels weight on the grain yield and straw yield of wheat. An artificial neural network (ANN), multilayer perceptron feed forward neural network (MLP) was used for developing the predictive model. Two different training algorithms: back propagation (BP) and genetic algorithm (GA) were used to train the MLP which structured of three neurons in the input layer, one hidden layer of six neurons, and two neurons in the output layer. The second objective of the current study was to …
Influence Of Nitrogen Fertilizer And Foliar Application Of Salicylic Acid On Wheat, Omar Maghawri Ibrahim Hassan Dr.
Influence Of Nitrogen Fertilizer And Foliar Application Of Salicylic Acid On Wheat, Omar Maghawri Ibrahim Hassan Dr.
Dr. Omar Maghawri Ibrahim
Two cemented plots experiments were carried out during the winter seasons of 2012/2013 and 2013/2014, Soil Salinity Laboratory, Alexandria, Egypt, to study the effect of three levels of salicylic acid (SA) (0, 50, 100 ppm) and three rates of nitrogen fertilizer (75, 100, 125 kg N/feddan) on yield and yield components of wheat (Sakha 93). The experimental design was split plot with four replicates. The results indicated that increasing nitrogen fertilizer rates resulted in significant increase in plant height (cm), number of grain/spike, number of spikes/m2, 1000 grain weight (gm), grain yield (gm/plot), straw yield (gm/plot), and biological yield (gm/plot). …
Performance Assessment Of Some Flax (Linum Usitatissimum L.) Varieties Using Cluster Analysis Under Sandy Soil Conditions, Omar Maghawri Ibrahim Hassan Dr.
Performance Assessment Of Some Flax (Linum Usitatissimum L.) Varieties Using Cluster Analysis Under Sandy Soil Conditions, Omar Maghawri Ibrahim Hassan Dr.
Dr. Omar Maghawri Ibrahim
To assess the performance and the variability of 49 flax varieties based on agronomic parameters using cluster analysis, a field experiment was conducted in 2011/2012 and 2012/2013 winter seasons at the farm of the National Research Center at Nubria district, Albehira Governorate, Egypt. The results revealed high significant difference among all flax varieties in all the studied characters. Letwania-9 and Evelen cultivars surpassed all other varieties in seed and oil yields/ fed. On the other hand, D variety gave the lowest value of seed yield/fed and F variety gave the lowest values of oil% and oil yield/fed. While, G Variety …
Lichens Of Six Vernal Pools In Acadia National Park, Maine, Usa, Jason Barton, Brett Ciccotelli, Jillian E. Gall, Fred C. Olday, Bruce Connery, Tanner B. Harris, Alan M. Fryday, Nishanta Rajakaruna
Lichens Of Six Vernal Pools In Acadia National Park, Maine, Usa, Jason Barton, Brett Ciccotelli, Jillian E. Gall, Fred C. Olday, Bruce Connery, Tanner B. Harris, Alan M. Fryday, Nishanta Rajakaruna
Nishanta Rajakaruna
Whereas lichen-habitat relations have been well-documented globally, literature on lichens of vernal pools is scant. We surveyed six vernal pools at Acadia National Park on Mount Desert Island, Maine, USA for their lichen diversity. Sixty-seven species were identified, including seven species that are new reports for Acadia National Park: Fuscidea arboricola, Hypogymnia incurvoides, Lepraria finkii, Phaeographis inusta, Ropalospora viridis, Usnea flammea, and Violella fucata. Five species are considered uncommon or only locally common in New England: Everniastrum catawbiense, Hypogymnia krogiae, Pseudevernia cladonia, Usnea flammea, and Usnea merrillii. This …
Resolution Of Deep Nodes Yields An Improved Backbone Phylogeny And A New Basal Lineage To Study Early Evolution Of Asteraceae, Jose L. Panero, Susana E. Freire, Luis Ariza Espinar, Bonnie S. Crozier, Gloria E. Barboza, Juan J. Cantero
Resolution Of Deep Nodes Yields An Improved Backbone Phylogeny And A New Basal Lineage To Study Early Evolution Of Asteraceae, Jose L. Panero, Susana E. Freire, Luis Ariza Espinar, Bonnie S. Crozier, Gloria E. Barboza, Juan J. Cantero
Jose L. Panero
A backbone phylogeny that fully resolves all subfamily and deeper nodes of Asteraceae was constructed using 14 chloroplast DNA loci. The recently named genus Famatinanthus was found to be sister to the Mutisioideae–Asteroideae clade that represents more than 99% of Asteraceae and was found to have the two chloroplast inversions present in all Asteraceae except the nine genera of Barnadesioideae. A monotypic subfamily Famatinanthoideae and tribe Famatinantheae are named herein as new. Relation- ships among the basal lineages of the family were resolved with strong support in the Bayesian analysis as (Barnadesioideae (Famatinanthoideae (Mutisioideae (Stifftioideae (Wunderlichioideae– Asteroideae))))). Ancestral state reconstruction …
Spatial And Temporal Dynamics Of Root Exudation: How Important Is Heterogeneity In Allelopathic Interactions?, Jeffrey D. Weidenhamer, Brian K. Mohney, Nader Shihada, Maduka Rupasinghe
Spatial And Temporal Dynamics Of Root Exudation: How Important Is Heterogeneity In Allelopathic Interactions?, Jeffrey D. Weidenhamer, Brian K. Mohney, Nader Shihada, Maduka Rupasinghe
Jeffrey D. Weidenhamer
Understanding allelopathy has been hindered by the lack of methods available to monitor the dynamics of allelochemicals in the soil. Previous work has demonstrated the feasibility of using polydimethylsiloxane (PDMS) microtubing (silicone tubing microextraction, or STME) to construct sampling devices to monitor the release of lipophilic allelochemicals from plant roots. The objective of this study was to use such sampling devices to intensively monitor thiophene fluxes beneath marigolds over several weeks to gain insight into the magnitude of temporal and spatial heterogeneity in these fluxes. Marigolds were grown in rhizoboxes (20.5 x 20.5 x 3.0 cm) with 16 individual STME …
Synthesis And Future Directions: What Have Harsh Environments Taught Us About Ecology, Evolution, Conservation, And Restoration?, Nishanta Rajakaruna, Robert S. Boyd, Tanner B. Harris
Synthesis And Future Directions: What Have Harsh Environments Taught Us About Ecology, Evolution, Conservation, And Restoration?, Nishanta Rajakaruna, Robert S. Boyd, Tanner B. Harris
Nishanta Rajakaruna
No abstract provided.
Additional Lichen Records And Minerological Data From Metal-Contaminated Sites In Maine, Ian D. Medeiros, Alan M. Fryday, Nishanta Rajakaruna
Additional Lichen Records And Minerological Data From Metal-Contaminated Sites In Maine, Ian D. Medeiros, Alan M. Fryday, Nishanta Rajakaruna
Nishanta Rajakaruna
Geochemistry and mineralogy of rocks play important roles in the occurrence of individual lichen species and assembly of lichen communities. Whereas lichens of metal-enriched settings have been a focus of study for many decades, only a few such lichen inventories exist for North America. We reexamined the lichen biota of Pine Hill, a serpentine outcrop on Little Deer Isle, Maine and Callahan Mine, a copper- and zinc-enriched Superfund site in Brooksville, Maine by conducting additional field surveys and reexamining unidentified taxa from previous collections. To better characterize the substrates upon which the lichens were found, we conducted elemental analyses via …
Progress And Future Prospects Of Developing Transgenics In Mango, Rajesh Pati
Progress And Future Prospects Of Developing Transgenics In Mango, Rajesh Pati
Rajesh Pati
Mango (Mangifera indica L.) is the most important fruit crop of the world. India ranks first among world’s mango producing countries accounting for 57.18 % of the total world mango production of 19.22 million tones. With the development of rDNA technology, plant breeders have access to a large number of genes that can be integrated into the plant genome.
Histological And Biochemical Changes In Aegle Marmelos, Rajesh Pati
Histological And Biochemical Changes In Aegle Marmelos, Rajesh Pati
Rajesh Pati
Aegle marmelos Corr., belongs to family Rutaceae, is more prized for its pharmacological virtues than its edible quality. Because of pharmacological importance, it’s become potential candidate for developing transgenics to enhance its medicinal properties. Maximum mortality of micropropagated plants occur during acclimatization phase because plantlets undergo rapid and extreme changes in physiological functioning, histological and biochemical changes. In order to investigate the actual reason of this limitation, test samples were collected at different stages of micropropagation of Aegle marmelos Corr. (In vitro stage, acclimation stage, and field established plants).
Somatic Embryogenesis In Mono And Poly Embryonic Cultivars, Rajesh Pati
Somatic Embryogenesis In Mono And Poly Embryonic Cultivars, Rajesh Pati
Rajesh Pati
A standard uniform protocol of regeneration is the prime and foremost prerequisite for not only improve the productivity, the production from the existing area but also development of transgenics in mango for various traits. Polyembryonic cultivars are good rootstock because of moderate canopy, tolerant to draught, salt, environmental stress (wind, high temperature, air pollution), fungal disease (anthracnose, powdery mildew, gummosis) and hoppers.
Genetic Transformation Of Bael (Aegle Marmelos Corr.), Rajesh Pati
Genetic Transformation Of Bael (Aegle Marmelos Corr.), Rajesh Pati
Rajesh Pati
Aegle marmelos Corr. is better known for its medicinal values rather than its edible quality. Every part of the plant viz. leaves, fruits, roots, and the bark are used for treating various diseases related to heart, stomach, bacterial, fungal, viral, worms, fertility, fever and cosmetics. Marmelosin is one of the major compounds (coumarin), used to treat various diseases. Till date, there are no varieties developed for commercial orchards of Bael and hence, regarded as one among the underutilized fruits of India. Therefore, there is an urgent need for breeding new and cultivable varieties in Aegle marmelos. But the problem for …
Micropropagation In Fruit Crops, Rajesh Pati
Micropropagation In Fruit Crops, Rajesh Pati
Rajesh Pati
Micropropagation is a proven means of producing millions of identical plants under a controlled and aseptic condition, independent of seasonal constraints. It not only provides economy of time and space but also gives greater output and allows further augmentation of elite disease free propagules. India is homeland of many important fruit crops such as Indian gooseberry (Emblica officinalis Gaertn), bael (Aegle marmelos Corr.), Guava (, Psidium guajava), jamun or black plum (Syzygium cuminii L. Skeels.), Mango (Mangifera indica) and Papaya (Carica papaya).
In Vitro Plant Regeneration And Genetic Assessment Among Regenerates Using Molecular Markers In Aegle Marmelos Corr., Rajesh Pati
In Vitro Plant Regeneration And Genetic Assessment Among Regenerates Using Molecular Markers In Aegle Marmelos Corr., Rajesh Pati
Rajesh Pati
Bael (Aegle marmelos Corr.) is an important medicinal fruit tree. The fruit pulp contains marmelosin, which is a laxative, diuretic, is being used in many patented drugs in India. Micropropagation technology can be gainfully employed in mass multiplication of improved bael varieties. We have developed micropropagation protocol of bael through shoot bud culture. It was imperative to test genetic fidelity of micropropagated plants using molecular markers (RAPD, DAMD and ISSR).
Histological And Biochemical Changes In Aegle Marmelos Corr. Before And After Acclimatization, Rajesh Pati
Histological And Biochemical Changes In Aegle Marmelos Corr. Before And After Acclimatization, Rajesh Pati
Rajesh Pati
Maximum mortality of micropropagated plants occur during acclimatization phase because plantlets undergo rapid and extreme changes in physiological functioning, histological and biochemical changes. In order to investigate the actual reason of this limitation, test samples were collected at different stages of micropropagation of Aegle marmelos Corr. (In vitro stage, acclimation stage). The biochemical result showed that micropropagated plantlets produced significantly low total chlorophyll (0.042 mg/g fresh weight), reducing sugar (3.227%), NR activity (1.353 NO2/h/g fresh weight) and but higher protein (0.048 μg/g) during in vitro phase. The in vitro raised plants showed abnormal histological features like altered leaf mesophyll, absence …
Semi-Automated Classification Of Gray Scale Aerial Photographs Using Geographic Object Based Image Analysis (Geobia) Technique, Ahmed Harb Rabia, Fabio Terribile
Semi-Automated Classification Of Gray Scale Aerial Photographs Using Geographic Object Based Image Analysis (Geobia) Technique, Ahmed Harb Rabia, Fabio Terribile
Ahmed Harb Rabia A.H. Rabia
Aerial photography is an important source of high resolution remotely sensed data. Before 1970, aerial photographs were the only remote sensing data source for land use and land cover classification. Using these old aerial photographs improve the final output of land use and land cover change detection. However, classic techniques of aerial photographs classification like manual interpretation or screen digitization require great experience, long processing time and vast effort. A new technique needs to be developed in order to reduce processing time and effort and to give better results. Geographic object based image analysis (GEOBIA) is a newly developed area …
Land Suitability Analysis For Policy Making Assistance: A Gis Based Land Suitability Comparison Between Surface And Drip Irrigation Systems, Ahmed Harb Rabia A.H. Rabia, H. Figueredo, T. L. Huong, B. A. A. Lopez,, H. W. Solomon, V. Alessandro
Land Suitability Analysis For Policy Making Assistance: A Gis Based Land Suitability Comparison Between Surface And Drip Irrigation Systems, Ahmed Harb Rabia A.H. Rabia, H. Figueredo, T. L. Huong, B. A. A. Lopez,, H. W. Solomon, V. Alessandro
Ahmed Harb Rabia A.H. Rabia
Land suitability assessment for irrigation is a very important tool not only in terms of agriculture development planning, but also to overcome the global problem of water scarcity. The aim of this study is to spatially evaluate land suitability of the study area, Kilte Awulaelo district in Ethiopia, for surface and drip irrigation methods based on GIS and remote sensing approaches. This work has been done as a part of the 29th Course Professional Master in Istituto Agronomico per l’Oltremare, Florence, Italy. Final suitability maps show the irregularity of suitability classes’ distribution over the study area. Results show that only …
Introducing A New Parametric Concept For Land Suitability Assessment, Ahmed Harb Rabia
Introducing A New Parametric Concept For Land Suitability Assessment, Ahmed Harb Rabia
Ahmed Harb Rabia A.H. Rabia
In an ecosystem, there is need to establish the quantity and quality of resources and their suitability for a certain range of land uses in order to assure its future productivity and sustainability of biodiversity. Parametric methods are widely used for land suitability evaluation. A new parametric concept “equation” of land suitability evaluation has been proposed to improve results of land suitability evaluation. Land suitability assessment for wheat production was conducted in order to compare results of the suggest method with classical parametric methods. Organic matter, CaCO3, pH, Slope, texture, drainage, depth, EC and altitude were recognized as factors affecting …
Travelling In Cuba, Fathi Habashi
Travelling In Cuba, Fathi Habashi
Fathi Habashi
Contact with Cuban scientists was established in 1986 when two researchers from Centro de Investigaciones para Industria Minero Metalurgica in Havana visited Laval University to get acquainted with research activities in the area of extractive metallurgy. This was followed in early 1987 by two more researchers from the same centre. Invitations were then received in late 1987, 1989, and 2008 to visit the nickel refineries in Cuba and to hold seminars at the University of Havana. The present report outlines these activities.
Deep Pipe Irrigation, David A. Bainbridge
Deep Pipe Irrigation, David A. Bainbridge
David A Bainbridge
Deep pipe irrigation uses a vertically placed section of pipe to deliver water to the roots of plants. This reduces evaporation and increases water use efficiency. Deep pipes can be filled by hand, drip or rainwater catchment.
Organogenesis Of Ammi Majus Via Callus Culture From Leaf., Sandip S. Magdum, Sanjeev Kumar
Organogenesis Of Ammi Majus Via Callus Culture From Leaf., Sandip S. Magdum, Sanjeev Kumar
Sandip S. Magdum
Ammi majus L. is an imperiled medicinal plant, which contains various medically important and uncommon extraordinary secondary metabolite compounds. An efficient organogenesis protocol was established for Ammi majus through in vitro process of leaf callusing, shooting and rooting by using different combination of auxins and cytokinins. In vitro cultured juvenile leaf explants were used directly for callus formation on MS supplemented with different concentration of IAA, Kn and CH. Maximum percentage response for callus formation was 97.7 after 5 weeks of incubation on MS supplemented with 2 mg/l IAA, 2 mg/l Kn and 1000 mg/l CH. About 81% of calluses …
A Reliable And High Yielding Method For Isolation Of Genomic Dna From Ammi Majus., Sandip S. Magdum
A Reliable And High Yielding Method For Isolation Of Genomic Dna From Ammi Majus., Sandip S. Magdum
Sandip S. Magdum
The developed protocol describes a cheaper, quicker and reliable method for the isolation of pure DNA from medicinal herbs, such as Ammi majus, which produces the secondary metabolites xanthotoxin and berganpectane having immense medicinal importance. Use of CTAB, liquid nitrogen and EDTA in different isolation protocols analyzed for A. majus, all were ended with polysaccharide and protein contamination with low purity of DNA (A260/280 = 1.3 – 1.6), revealed a need for method modification for the inexpensive and rapid isolation of pure DNA. Developed reliable and competent protocol isolated enough pure DNA (A260/280 = 1.81) without following time consuming lengthy …
Effect Of Agrobacterium Induced Necrosis, Antibiotic Induced Phytotoxicity And Other Factors In Successful Plant Transformation., Sandip S. Magdum
Effect Of Agrobacterium Induced Necrosis, Antibiotic Induced Phytotoxicity And Other Factors In Successful Plant Transformation., Sandip S. Magdum
Sandip S. Magdum
Agrobacterium tumefaciens infection and antibiotic wash are the critical steps of Agrobacterium mediated plant transformation procedure, most time responsible for lower transformation efficiency due to necrosis and phytotoxicity caused by biotic stress of Agrobacterium and abiotic stress by antibiotics respectively. Ammi majus Egyptian origin medicinal plant and Pearl millet cereal grain crop were studied for their stress responses to Agrobacterium mediated transformation (AMT). Agrobacterium strains LBA4404 (O.D.=0.6-0.8) and EHA105 (O.D.=0.2-0.4) were used for transformation experiments to infect calli of Ammi majus and embryogenic calli of Pearl millet respectively. Incase of antibiotic wash, Cefotaxime 500 mg L-1 was used for LBA4404 …
Antioxidant Potential, Cytotoxic Activity And Total Phenolic Content Of Alpinia Pahangensis Rhizomes, Halijah Ibrahim, Phang C. W., Abd Malek S. N.
Antioxidant Potential, Cytotoxic Activity And Total Phenolic Content Of Alpinia Pahangensis Rhizomes, Halijah Ibrahim, Phang C. W., Abd Malek S. N.
Halijah Ibrahim
BACKGROUND: Alpinia pahangensis, a wild ginger distributed in the lowlands of Pahang, Malaysia, is used by the locals to treat flatulence. In this study, the antioxidant and cytotoxic activities of the crude aqueous methanol and fractionated extracts of Alpinia pahangensis against five different cancer and one normal cell lines were investigated. The total phenolic content of each extract and its fractions were also quantified. This is the first report on the antioxidant and cytotoxic activities of Alpinia pahangensis extract. METHODS: In the current study, the crude methanol and fractionated extract of the rhizomes of Alpinia pahangensis were investigated for their …
Fungal Superhighways: Do Common Mycorrhizal Networks Enhance Belowground Communication?, E K. Barto, Jeffrey D. Weidenhamer, D Cipollini
Fungal Superhighways: Do Common Mycorrhizal Networks Enhance Belowground Communication?, E K. Barto, Jeffrey D. Weidenhamer, D Cipollini
Jeffrey D. Weidenhamer
In many natural communities communication between plants and other organisms below ground drives community dynamics. This communication is primarily through the release and detection of infochemicals, which must traverse the soil matrix to be effective. In this opinion article, we propose the Network Enhanced Bioactive Zone (NEBaZ) model, which posits that common mycorrhizal networks (CMNs) increase the bioactive zones of infochemicals by serving as superhighways directly connecting plants below ground. Here we argue that infochemical transport via CMNs allows for systemic defense signaling across plant populations and directed allelochemical delivery to target plants. Plant-animal interactions may also be facilitated by …