Journal of
Horticulture and Forestry

  • Abbreviation: J. Hortic. For.
  • Language: English
  • ISSN: 2006-9782
  • DOI: 10.5897/JHF
  • Start Year: 2009
  • Published Articles: 302

JHF Articles

Biocontrol approach to management of greenpeach aphid Myzus persicae in garden peas for a sustainable ecosystem

August 2011

Green peach aphid has been a significant pest of garden peas in Kenya for many years, because of its capacity to transmit viruses. Despite advances in integrated pest management, and frequent use of insecticides, the industry is still plagued by the insect. Adding to the problem is the fact that the peach aphid has proved to be resistant to various insecticides; there is a need to shift emphasis on biological control...

Author(s): Ochieng, S. O. and Nderitu, P. W.

Up-scaling production of certified potato seed tubers in Kenya: Potential of aeroponics technology

August 2011

Unavailability of certified seed tubers is a major constraint to potato production in Kenya. This compels most farmers to use planting materials from informal sources such as previous harvests, local markets and neighbours. Kenya Agricultural Research Institute (KARI), Tigoni has the national mandate to produce basic seed tubers but can only supply much less than 1% of the national seed requirements. In order to improve...

Author(s): Jane Muthoni, Miriam Mbiyu and Jackson N. Kabira

Comparative assessment of floristic diversity in a buffer zone community forest and a community forest of Barandabhar corridor, Chitwan, Nepal

August 2011

This research was carried out in the Bandevi buffer zone community forest (BZCF) and Satkanya community forest (SCF) of Barandabhar corridor area in Chitwan district of Nepal to assess and compare the status of floristic diversity in buffer zone community forest and community forest in Barandabhar corridor in Chitwan district of Nepal, managed under different rules and regulations. Primary data were collected from...

Author(s): Rishi Ram Dhakal, Gandhiv Kafle and Jay N. Yadava

Growth habit, plant density and weed control on weed and root yield of sweet potato (Ipomoea batatas L.) Areka, Southern Ethiopia

August 2011

Sweet potato is mostly left unweeded or weeded lately. Effect of variety, plant density and weeding frequency on weed and tuber yield was studied from 1992 to 1994. Three varieties (Tis 1499: erect and early; Tis 2498: long vine, spreading and early, and Koka 6 intermediate), two weeding frequencies (30 to 40 (W1) and 70 days after sprout (DAS) (W2), and four plant densities (5, 7, 10, and 12.5 plants m-2) were laid out...

Author(s): Tenaw Workayehu, Waga Mazengia and Legesse Hidoto

Effect of photoperiod on propagation of Strawberry (Fragaria × ananassa Duch.)

August 2011

The effect of photoperiod on multiplication of commercial strawberry cultivars was investigated at the Malaysian Agricultural Research and Development Institute (MARDI) Station in Cameron Highlands. Two strawberry cultivars, Camarosa and Camaroga, were grown under a plastic rain-shelter supplemented with three levels of photoperiod, 12 (normal day length of Cameron Highland), 15 and 17 h. The result showed that...

Author(s): Sayed M. Zain Hasan, Isam Al-Madhagi, Aziz Ahmad and Wan Abdullah Bin Yusoff

Impact of government financial incentives on peri-urban vegetable production in Botswana

August 2011

In its effort to increase agricultural productivity, the Government of Botswana has established a financial scheme to improve vegetable production. Citizen Entrepreneurial Development Agency (CEDA) and CEDA young farmers fund are encouraging farmers to get involved in vegetable production through financial and technical assistants. However, data on the impacts of these funds on vegetable production in the country are...

Author(s): M. E. Madisa and Y. Assefa

Will afforestation in temperate zones warm the Earth?

July 2011

For decades, forest researchers have known that planting trees on cropland or pastures (that is, afforestation) can lower the surface albedo and that landscapes with low albedo absorb more solar radiation than more reflective surfaces. Consequently, afforestation will typically darken the Earth’s surface (when compared to grasslands or deserts). In spite of this knowledge, many believe that afforestation will cool...

Author(s): David B. South, Xuhui Lee and Michael G. Messina

Effect of mulching and amount of water on the yield of tomato under drip irrigation

July 2011

The main challenge confronting both rain fed and irrigated agriculture is to improve WUE and sustainable water use for agriculture. An experiment was conducted to evaluate the effect of mulch and amount of water on the yield of tomato under drip irrigation system and to assess the potential of deficit irrigation to improve the economic efficiency of tomato production at Adet Agricultural Research Center, horticultural...

Author(s): Baye Berihun

Production, processing and marketing of ginger in Southern Ethiopia

July 2011

The cultivation of ginger was started in Ethiopia during 13th century when Arabs introduced it from India to east Africa (Janson, 1981). In Ethiopia it is limited mostly in the wetter regions of Southern Nations, Nationalities and Peoples Regional State (SNNPRS) and some parts of western Oromia. Most of the commercial production is practiced in SNNPRS by farmers within Kambata-Tambaro, Wolaita and Hadiya zones. Despite...

Author(s): Endrias Geta and Asfaw Kifle

An evaluation of successful reclamation of bauxite residue through afforestation activities in south India

July 2011

The present article is based on the results of a pilot project implemented to improve the physico chemical characteristics of bauxite residue (red mud) in order to make it suitable for rehabilitation through afforestation activities. Prior to interventions, extensive experimentation on various reclamation trials involving combinations of soil amenders along with bacteria and mycorrhizae and selection of suitable tree...

Author(s): Suresh Chauhan and C. S. Silori

Households’ exploitation of non-wood forest products (NWFPs) in Okitipupa Local Government Area of Ondo State, Nigeria

July 2011

Exploitation of NWFPs poses serious threat to sustainable forest management in Nigeria. This study analyzed the driving forces for exploiting forest products in Okitipupa Local Government area of Ondo State, Nigeria. Data were obtained through structured questionnaires that were randomly administered to farmers. The data were subjected to descriptive analysis and Tobit regression. Results show that monetary worth...

Author(s): A. S. Oyekale and D. O. Ajesi

Development of a low-cost tensiometer driven irrigation control unit and evaluation of its suitability for irrigation of lychee trees in the uplands of Northern Thailand in a participatory approach

July 2011

In upland areas of Northern Thailand, lychee (Litchi chinensis, Sonn.) is one of the predominant fruit crops. Fruit development takes place during the dry season (January until June). Therefore, high lychee yields can only be obtained under irrigation. As water is an increasingly scarce resource in the hillsides, strategies for more efficient water use are fundamental for a sustainable increase in agricultural...

Author(s): Satid Pinmanee, Wolfram Spreer, Klaus Spohrer, Somchai Ongprasert,and Joachim Müller,

Contribution of forests to achieving the millennium development goals

June 2011

The United Nation’s millennium development goals (MDGs) are common objectives that provide a framework to meet the basic needs and rights of millions of people in the developing world. Eight goals with 18 targets and over 40 indicators will help to monitor and meet up with these goals. A target date of 2015 had been set for the world leaders to work towards. Forest management and conservation is central to the...

Author(s): Ofuoku A. U. and Agbogidi O. M.

Potential of traditional food plants in rural household food security in Botswana

June 2011

Botswana is endowed with a variety of traditional food plants which grow annually despite erratic rainfall. The most common traditional food plants are leafy vegetables (for example, Amaranthus, Cleome, Conchorus and Vigna species) and indigenous fruits (for example, Azanza garckeana, Strychnos cocculoides, Sclerocarya birreaetc.). They provide an important source of food for people with...

Author(s): G. M. Legwaila, W. Mojeremane, M. E. Madisa, R. M. Mmolotsi and M. Rampart

Soil seed banks of a rangeland area White Nile State, Sudan

June 2011

Three soil depths (0 to 5, 5 to 10 and 10 to 15 cm) were chosen at the study area and the soil seed bank was analyzed for the number of live and dead seeds for each of them. The analysis revealed the following: The seed bank density was higher in the upper soil depths (0 to 5 and 5 to 10 cm) as compared to the lower ones (10 to 15 cm). It was found that the seed density had decreased with increasing depth. The live seed...

Author(s): A. K. Elsafori, A. N. Guma,a and M. A. El Nour

Relation between catalase activity, salt stress and urban environments in Citrus aurantium L.

June 2011

In order to evaluate the degree of adaptation of urban Citrus aurantium L. trees to osmotic stress and to explore the effect of seed’s origin on stress tolerance/adaptation, catalase activity levels were measured. Before carrying out the analysis, seedlings issued from high and low plant mother’s vitality were grown on NaCl stressed media during 2 months. Catalase activities revealed different...

Author(s): Khelifa, S., M’Hamdi, M., Rejeb, H., Belbahri, L. and Souayeh, N.

Screening of certain varieties of Emblica officinalis Gaertn. for resistance to insect pests and diseases in central India

June 2011

Ten varieties of Emblica officinalis Gaertn. including  Kanchan, Chakaiya, Francis, NA-7 (Narendra-7), NA-10 (Narendra 10), Anand-1, Anand-2, Krishna, Hatizola (Local) and Local- wild were screened against insect pests that is, gall forming insect (Betousa stylophora Swinhoe), leaf roller (Garcillaria acidula Forster), bark eating caterpillar (Indarbela quadrinotata Walker) and diseases...

Author(s): P. B. Meshram and K. K. Soni

Integration of trees in orchards: Opportunities to increase tree cover in Punjab

May 2011

Farming in Punjab has been the predominantly economic activity managing food production system. Integration of trees on agriculture land is increasingly appreciated as an important strategy for secured additional economic income. This is demonstrated by the 0.37% cropping area being under Wheat-poplar system. The extension of this strategy is the integration of trees in orchards in the state. Various fruits like Guava,...

Author(s): W. S. Dhillon, H. V. Srinidhi, Chaturjeet Singh and Navjot

Seasonal availability and consumption of wild edible plants in semiarid Ethiopia: Implications to food security and climate change adaptation

May 2011

Quantitative ethnoecological analysis of seasonal availability and implication to food security of wild edible plants (WEPs) was conducted in Boosat and Fantalle districts of semiarid east Shewa, Ethiopia from October, 2009 to September, 2010. Semistructured interview, focus group discussions, key informants discussions, seasonal record of fruits abundance were used to collected data on gathering and consumption of WEPs...

Author(s): Debela Hunde Feyssa, Jesse .T. Njoka, Zemede Asfaw and M. M. Nyangito

Effect of methyl bromide alternatives on seedling quality, nematodes and pathogenic soil fungi at the Jesup and Glennville Nurseries in Georgia: 2007 to 2008

May 2011

For many years, forest-tree nurseries in the United States have relied on methyl bromide (MBr) soil fumigation to control weeds, pathogenic fungi, insects and nematodes. However, due to the concern over ozone depletion in the stratosphere, finding a soil fumigant alternative for MBr has been a priority for the forest nursery industry since 1991. A large-scale study comparing seven fumigants using operational application...

Author(s): S. A. Enebak, T. E. Starkey and M. Quicke

Needle-clipping of longleaf pine (Pinus palustris Mill.) can increase seedling survival while reducing transpiration and root growth potential

May 2011

Clipping needles of longleaf pine (Pinus palustris Mill.) prior to transplanting has been shown to increase seedling survival but the mechanism for this effect is not well documented. A greenhouse trial was conducted to examine the effect of clipping needles on transpiration, root-growth potential (RGP) and seedling survival. Clipping longleaf pine needles to a length of 5 cm reduced transpiration and reduced RGP...

Author(s): David B. South, Tom E. Starkey and D. Paul Jackson

Host location and ovipositional preference of Elaeidobius kamerunicus on four host palm species

May 2011

The response of the oil palm pollinating weevil Elaeidobius kamerunicus Faust (Coleoptera: Cucurlionidae) to the inflorescence of different palm species was tested in a choice, non- choice and a four arm- olfactometer bioassay. Weevils preferred significantly the inflorescence of oil palm (E. guineensis Jacq) for oviposition. In both choice and non-choice tests using mated adult females, significantly...

Author(s): Adaigbe V. C., Odebiyi J. A., Omoloye A. A., Aisagbonhi C. I. and Iyare O.

Effects of three pre-treatment techniques on dormancy and germination of seeds of Afzelia africana

April 2011

The study assessed the effects of three pre-treatment techniques on dormancy and germination of seeds of Afzelia africana (Sm. ex Pers), an endangered tree species in Savanna ecozone of Nigeria. The three pre-treatment techniques are: soaking in cold water for 1, 12 and 24 h, soaking in hot water (100â—¦C) for 1, 12 and 24 h and soaking in 10, 50 and 98% concentrated sulphuric acid (H2SO4) for 5, 10 and 30...

Author(s): Amusa, T. O.

Genetic diversity and population structure of 151 Cymbidium sinense cultivars

April 2011

Cymbidium sinense cultivars exhibit an incredible range of diversity in the foliar morphology as well as the range of flower colors and shapes, which make them more popular among horticultural plants with great economic value. Understanding the genetic diversity and population structure in target populations will be of great importance for germplasm collection, breeding improvement and conversation of this species....

Author(s): Jiangjie Lu , Xu Hu, Junjun Liu and Huizhong Wang

Retracted: Impact of mobile phones on the density of honeybees

April 2011

Apiculture has developed into an important industry in India as honey and bee-wax have become common products. Recently, a sharp decline in population of honey bees has been observed in Kerala. Although the bees are susceptible to diseases and attacked by natural enemies like wasps, ants and wax moth, constant vigilance on the part of the bee keepers can overcome these adverse conditions. The present plunge in...

Author(s): Sainudeen Sahib S.

Commons becoming non-commons in the efforts for reconciliation between conservation and livelihoods: A case study of northern Pakistan

March 2011

  The paper examines the impact of converting previous open-access common land into protected areas on the community resource management system in Shimshal, northern Pakistan. We explored three main questions in this regard. First, what happens to community resource management under strict government control of the resource? Secondly, what has happened to the centuries-old practice of the traditional yak...

Author(s): S. R. Khan, S. A. Rahman and T. Sunderland

Performance of 40 poinsettia cultivars grown under two different temperatures

March 2011

  This study evaluated forty poinsettia cultivars to determine which cultivars perform well under cool  growing temperatures. Poinsettias were grown in separate greenhouses at temperatures of 20°C during  the day and 17°C at night for cold production, or 25°C during the day and 22°C at night for warm  production. Number of lateral shoots leading to inflorescences,...

Author(s): Bruce L. Dunn, Carla Goad and Stephen Stanphill

Deterioration of Acacia in western Butana plain, Sudan

March 2011

  Acacia of the western Butana plain of the Sudan has undergone severe deterioration during last decades as demonstrated by a survey carried out in 2005. The majority of Acacia is non-succulent which are differing spatially, by soil type and in cover; frequency; abundance and density. There was a climax for Acacia in the study area prior to 1850, while its deterioration took place through four successive...

Author(s): Samir Mohamed Ali Hassan Alredaisy and Mohamed Ahmed Haj Ali Zubair

Investigation of biofertilizers influence on quantity and quality characteristics in Nigella sativa L.

March 2011

  To reduce farmers’ dependency on mineral fertilizers, to increase water use efficiency, and to increase households’ incomes, participatory on-farm research trials to test the beneficial impact of biological fertilizers application on black cumin (Nigella sativa L.) some yield characters were investigated. Our objectives in this study were the interactive effects of biofertilizer...

Author(s): Sayed Alireza Valadabadi and Hossein Aliabadi Farahani

Conservation of microbial diversity to sustain primary and secondary productivity

March 2011

  The microbial world is the largest unexplored reservoir of biodiversity on the earth. It is an important frontier in biology under intensive investigations. The exploration of microbial diversity has been spurred by the fact that microbes are essential for life since they perform numerous functions essential for the biosphere that include nutrient recycling and environmental detoxification. The management and...

Author(s): Vijai Singh, Joshi, B. B. and Awasthi, S. K. and Bhatt, R. P.

The effect of vermicompost and other fertilizers on cultivation of tomato plants

February 2011

  Field trials were conducted using different fertilizers having equal concentration of nutrients to determine their impact on different growth parameters of tomato plants. Six types of experimental plots were prepared whereT1 was kept as control and five others were treated by different category of fertilizers (T2-Chemical fertilizers, T3-Farm Yard Manure (FYM), T4-Vermicompost, T5 and T6- FYM...

Author(s): Goutam Kumar Chanda, Goutam Bhunia and Susanta Kumar Chakraborty

Fruit yield of virus-resistant transgenic summer squash in simulated commercial plantings under conditions of high disease pressure

February 2011

  Fruit yield of transgenic crookneck summer squash ZW-20 resistant to Zucchini yellow mosaic virus (ZYMV) and Watermelon mosaic virus (WMV) and of a susceptible nontransgenic lineage of the same genotype was compared over two consecutive years. Field trials relied on small-scale plantings that reflected commercial settings under conditions of severe disease pressure by ZYMV and WMV with infection achieved via...

Author(s): Ferdinand E. Klas, Marc Fuchs and Dennis Gonsalves,

Efficiency of seed extraction methods in the control of loss and low seed quality in egusi melon (Colocynthis citrullus L.)

February 2011

  This study determines the effect of methods of seed extraction on seed loss and viability on Egusi melon (Colocynthis citrullus L). Three methods of fruit breaking; vertical cut with knife, horizontal cut with knife and hitting with wooden club were tested to determine their effect on seed damage. Three covering materials; grass straw, black polyethylene sheet and no cover were also tested to determine...

Author(s): Ogbonna, P. E. and Odo, L. C.

Aqueous ozone in the root zone: Friend or foe?

February 2011

  Aqueous ozone (O3(aq)) solutions were applied to the rockwool substrate of hydroponically cultured tomato and cucumber plants. Single applications of high concentration solutions (0, 5, 10, 15, 20 mg/L), as well as repeated application of lower concentration solutions (0, 2, 4, 6 mg/L), had no impact on leaf area and shoot dry weight accumulation. Repeated O3(aq) applications were also applied to...

Author(s): Thomas Graham, Ping Zhang and Michael Dixon

Methods of braking seed dormancy on germination and early seedling growth of African locust bean (Parkia biglobosa) (JACQ.) Benth

January 2011

  An experiment was conducted under a net house in the department of Crop, Soil and Pest Management of the Federal University of Technology Akure. This was to investigate the most effective pre-sowing treatments to break seed dormancy, to stimulate seed germination and to identify morphological traits for the assessment of Parkia biglobosa seedling vigour.  Matured seeds of P....

Author(s): A. I. Okunlola, R. A. Adebayo and A. D. Orimogunje

Pollen Isolation Method Affects Interspecific Hybridization in Eucalyptus

January 2011

  The ultimate test for utility of a pollen sample is the seed yield following control pollination (CP). In the present study, two different methods of eucalyptus pollen isolation (PI) viz., wet-lyophylisation (WL) and conventionally dry-sieving (DS) were followed. The pollen thus isolated was used to carry interspecific hybridization in order to evaluate and compared the efficiency the above two methods of PI...

Author(s): Girijashankar V

Effect of cultivar on minor components in Tunisia olive fruits cultivated in microclimate

January 2011

  This paper evaluates the usefulness of three chemical parameters (composition of volatiles compounds, total phenols and fatty acids) as a tool to discriminate the olive oils obtained from three varieties (Oueslati, Chemlali and Chetoui). These varieties are included among the cultivars permitted by the disciplinary for the production of the ‘‘Kairouan olive oil’’, a Tunisian protected...

Author(s): Ouni Youssef, Flamini Guido, Douja Daoud and Zarrouk Mokhtar

Woody plant species used in urban forestry in West Africa: Case study in Lomé, capital town of Togo

January 2011

  Many studies have been conducted on the flora of Togo. However, none of them is devoted to the ornamental flora horticulture. This survey aims to establish an inventory of the woody plant species in urban forests of Lomé, the capital town of Togo. It covers the trees planted along the avenues, in the gardens, courtyards, shady trees and trees used as fences for houses or trees at the seaside. In total,...

Author(s): Radji Raoufou, Kokou Kouami and Akpagana Koffi

Conservation and management of genetic resources of horticultural crops in Nigeria: Issues and biotechnological strategies

November 2010

  Plant genetic resources (PGR) are basic requirements in crop improvement programme and their importance have increased in recent years with the changing scenario of ownership and legal regimes in relation to biodiversity. Horticultural genetic resources (HGR) are subset of agro-biodiversity that is related to garden crop species or their wild genepool, having genetic material of actual or potential value....

Author(s): J. U. Ogbu, , , B. A. Essien, J. B. Essien and M. U. Anaele

Preparation of value added products from the leaf powders of dehydrated less utilized green leafy vegetables

November 2010

  In India various types of under utilized foods are available seasonally but are not utilized to the extent they should be in spite of their higher nutritive value. Looking into the prevalence of high level of micronutrient malnutrition among the vulnerable sections, utilization of under utilized foods can be explored to overcome nutritional disorders. Through this study an attempt was made to analyze the...

Author(s): Pallavi Joshi and Beena Mathur

Provenance and family variation in germination and early seedling growth in Sclerocarya birrea sub-species caffra

November 2010

  Marula (Sclerocarya birrea subsp. caffra) forms an integral part of the diet, tradition and culture of rural communities in Swaziland. In addition contributes to economic, social and environmental stability. This study was an analysis of the variation between and within provenances of Sclerocarya birrea sub-species caffra (Marula) in germination and survival of seedlings, and height and root...

Author(s): Cliff S. Dlamini

Policy impact on resource use and conservation in Miombo woodland, Pindanganga, Mozambique

September 2010

  A case study was carried out in Pindanganga to analyse the impact of alternative forest management regimes and sectorial and extra sectorial policies on the well being of stakeholders and conservation of the woodlands using a dynamic game theoretic model, MIOMBOSIM. This study shows that the cooperative management regime is potentially beneficial to local communities if properly implemented and can improve...

Author(s): M. P. Falcão, R. U Sumaila and C. J. Geldenhuys

A survey of the economically valued forest trees and shrubs at the proposed site for an airport in Asaba, Delta State, Nigeria

September 2010

  This study assessed the economically valued forest trees and shrubs at the proposed site for an airport in Asaba, Delta State with a view to noting them before the commencement of work in the area. 2520 × 20 m quadrants were laid randomly along the five 1 km line transect and assessed accordingly. Thirty tree species producing various economically valued products were assessed and 10 out of the 33 were...

Author(s): O. M. Agbogidi

The first cultivar database in Spain

September 2010

  During the 2009 - 2010 periods, the “herbarium and horticultural variety database” project has been carried out in the town of Noguera (Teruel, Spain), the first project to dedicate its efforts to the creation of a database of cultivars marketed and/or cultivated in Spain, including 2124 cultivars.   Key words: Cultivar, database, herbarium, Spain.

Author(s): Daniel Guillot Ortiz

Towards the development of green energy saving mechanisms

August 2010

  Geothermal energy is the natural heat that exists within the earth and that can be absorbed by fluids occurring within, or introduced into the crystal rocks. Although, geographically, this energy has local concentrations, its distribution globally is widespread. The amount of heat that is theoretically available between the earth’s surface and a depth of 5 km is around 140 × 1024 J. Of this,...

Author(s):   Abdeen Mustafa Omer

Substitution of municipal solid waste compost for peat in cucumber transplant production

August 2010

  Municipal solid waste compost (MSWC) is used in agriculture as a fertilizer, organic soil additive and crop substrate. MSWC was examined as an alternative for peat in cucumber (Cucumis sativus L., cv. Radian) transplant production. An experiment was conducted in 2008 at the University of Guilan, Rasht, Iran with the treatments 100% peat+0% MSWC (control); 95% peat+5% MSWC, 90% peat+10% MSWC, 85% peat+15%...

Author(s): Yaqvob Mami and Gholamali Peyvast

Leaf nitrogen and potassium concentrations for optimum fruit production, quality and biomass tree growth in Clementine mandarin under Mediterranean climate

August 2010

  Leaf analysis is a useful tool to evaluate the nutrient status of citrus trees, but diagnosis standards for ‘Clementine mandarin’ are not available. Nutrition recommendations of the current fertilization practices are mainly based on the same recommended nutrient rates for orange trees. A three-year (2005 - 2007) field experiment was conducted in North Eastern Tunisia (El Gobba). This experiment...

Author(s): Abdelkader Hammami, Salah Rezgui and Rachid Hellali

Domestication of Irvingia gabonensis (Aubry Lecomte) by air layering

August 2010

  Irvingia gabonensis is one of the most important indigenous fruit tree species in African humid tropics. Methods have been developed for phenotypic selection and vegetative propagation of this species; but techniques for the capture of desired traits through inexpensive technological methods are still lacking. A series of experiments were conducted to assess the effects of auxin (Seradix-2) application...

Author(s): Zac Tchoundjeu, Alain Calice Tsobeng, Ebenezer Asaah and Paul Anegbeh

Computerized system for identification of some savanna tree species in Nigeria

July 2010

  A computerized system named LEASYS was developed to serve as a modern, less time-consuming and less cumbersome method of plant identification. The LEASYS system used was based on simultaneous narrowing of two classification systems that is, vertical and horizontal characters, and supplying these systems with an appropriate Boolean operator (the AND operator preferably). The system was based on leaf morphology...

Author(s): A. A. Abdulrahaman, I. B. Asaju, M. O. Arigbede and F. A. Oladele

Homogeneous light in shade-house experiment overestimates carbon gains in Norway maple seedlings

July 2010

  We set up a shade-house experiment with Norway maple growing at two light intensities typical of a disturbed and undisturbed forest canopy from either a homogeneous or a dynamic regime that mimics sunflecks. We show that although horticultural-grade shade-cloths can be finely tuned to provide daily averages of any light intensity, they do not appropriately mimic natural forest understories which are...

Author(s): Alain Paquette, Bastien Fontaine, Christian Messier and Jacques Brisson.

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