African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6136

AJAR Articles

March 2018

Allelopathic effects of aqueous extract of leaves and roots of Luetzelburgia auriculata (Allemão) Ducke on seeds germination and initial growth of lettuce (Lactuca sativa L.)

The secondary metabolism of plants produces allelopathic substances which are able to interfere with germination and growth of other species, when released in the environment. In order to evaluate the allelopathic effects of Luetzelburgia auriculata on the germination and early growth of lettuce (Lactuca sativa), leaf extracts and roots were tested in lettuce seeds sowing. The L. auriculata plant material was collected...

Author(s): PINTO Érika do Nascimento Fernandes, SOUTO Jacob Silva, PEREIRA Leonardo Francisco de Assis, BORGES César Henrique Alves and FERNANDES Tássia Rayane Nascimento  

March 2018

Efficacy of the decoction of cashew leaf (Spondias mombin L.) as a natural antiseptic in dairy goat matrices

Microorganisms resistant to conventional antimicrobial substances are becoming more prevalent. Accordingly, natural alternatives have been sought with the use of extracts from medicinal plants whose purpose is to find new compounds with recognized antimicrobial activity. This work aims to show the efficacy of the cajá (Spondias mombin L.) leaf decoction using the microplate dilution technique against...

Author(s): Camila Fernandes Leonêz, Francisco Marlon Carneiro Feijó, Nilza Dutra Alves, Caio Sergio Santos, Gardênia Silvana Oliveira Rodrigues, Fernando da Costa Fernandes and  Tayná Moura Matos  

March 2018

Plant extracts enhancers of defense response in ponkan mandarin Seedlings against Alternaria alternate f. spp. citri infection

The objective of this study was to determine the elicitor potential of plant extracts from Caatinga biome by enzyme activity and epidemiological components of Alternaria brown spot (Alternaria alternate f. spp. citri). These were prepared ethanolic, dichloromethanic, and aqueous extracts from 14 plants (Anadenanthera macrocarpa, Schinopsis brasiliensis, Maytenus rigida, Caesalpinia pyramidalis, C. ferrea, Peltophorum...

Author(s): Kedma Maria Silva Pinto, Paulo Alexandre Fernandes Rodrigues de Melo, Janaína Marques Mondego, Luciana Cordeiro do Nascimento, Maria Izabel Mendes Marques Cortez, Alfredo Augusto de Carvalho Aires, Antônio Pereira dos Anjos Neto, Robson Luís Silva de Medeiros, José Ribamar Gusmão Araújo and Hilderlande Florêncio da Silva  

March 2018

Effects of lime and fertilizer on soil properties and maize yields in acid soils of Western Kenya

Many soils in Western Kenya are acidic and deficient in nitrogen and phosphorus. Acidity hinders crop responses to fertilizers applied to remedy nutrient deficiencies. The common liming materials used to ameliorate acidity are Calcium Oxide (CaO) and Calcium Carbonate (CaCO3) in powdery formulations. Broadcasting these materials by hand followed by incorporation is recommended on smallholder farms to enhance their...

Author(s): Peter A. Opala, Martins Odendo and Francis N. Muyekho  

March 2018

Determinants of small-scale farmers’ adaptation decision to climate variability and change in the North-West region of Cameroon

Small-scale farmers’ adaptation decision in the face of climate variability and change (CVC) depends largely on their ability to perceive the impacts of CVC as well as their degree of vulnerability to these impacts. This research looks at the factors that influence small-scale farmers’ adaptation decision faced with climate variability and change, with particular focus on Mbengwi Central Sub-Division,...

Author(s): Nyong P. Awazi and Martin N. Tchamba

March 2018

Planting density and number of stems for ecological crop determinate growth tomato

Tomato growers adopting an ecologically based system have opted for determinate growth varieties due to their ease of staking and sprouting, and due to the fact that they have a shorter cycle, which reduces phytosanitary problems that usually occur towards the end of the growing season. This study aimed to evaluate yield components and fruit quality of ‘Floradade’ determinate growth tomato in an ecologically...

Author(s): Denise de Souza Martins, Maristela Watthier, José Ernani Schwengber, Diego Rosa da Silva, Ryan Noremberg Schubert and Roberta Marins Nogueira Peil

March 2018

Incidence and severity of maize streak disease: The influence of tillage, fertilizer application and maize variety

Maize streak disease (MSD) is one of the most destructive diseases of maize (Zea mays L.) estimated to cause a yield loss of about 20% in Ghana. Field experiment was conducted at Nkwanta in the Volta Region of Ghana during the cropping seasons of 2015 to assess the effects of tillage practices, fertilizer application and maize variety on the incidence and severity of MSD. The MSD severity was assessed using 1 to 5...

Author(s): D. Blankson, E. Asare-Bediako, K. A. Frimpong, E. Ampofo, K. J. Taah and G. C. Van der Puije  

March 2018

Screening for salinity tolerance of Oryza glaberrima Steud. seedlings

Rice (Oryza sativa) is a salt-sensitive species and improvement of salt resistance is a major goal for plant breeders. Some species of Oryza genus may constitute an interesting source of genes involved in stress resistance for cultivated rice improvement. The African rice Oryza glaberrima is poorly described for its response to salt stress. Twenty-five accessions of O. glaberrima were exposed during 2 weeks to 0 or 60...

Author(s): Hermann Prodjinoto, Christophe Gandonou and Stanley Lutts

March 2018

The effects of intercropping and plant densities on growth and yield of maize (Zea mays L.) and soybean (Glycine max) in the humid forest zone of Mount Cameroon

A field experiment was conducted to evaluate the effects of intercropping and planting densities on the growth and yield of maize (Zea mays) and soybeans (Glycine max).  A 1 ha plot located at the Institute of Agricultural Research for Development (IRAD), Ekona, South West Region of Cameroon was used. There were two blocks: block 1 which was fertilized with 60 kg/ha NPK (20:10:10) and top dressed with urea at 50 kg...

Author(s): Eneke E. Bechem, Agbor N. Ojong and Kingsley A. Etchu

March 2018

Addressing soil organic carbon issues in smallholders’ farms in Ethiopia: Impact of local land management practices

Soil organic carbon plays a key role in plant biomass production. On smallholder farms, crop and livestock are traditionally integrated and support each other. However, due to changes in socio-economic factors, this relationship is lost as resources are mismanaged. The present study was conducted in the Central Ethiopian highlands that represent about 90% of the country’s smallholder farmers. The objective of this...

Author(s): N. A. Minase, M. M. Masafu and A. Tegegne  

March 2018

Leaf content of macronutrients in Tabebuia aurea seedlings grown on different substrates and luminosities

Taking into consideration that species react differently to the substrate and luminance variations, this study aimed to evaluate the leaf content of some macronutrients and dry matter in Tabebuia aurea seedlings through the hypothesis that the growth environment can alter the concentration of chemical elements in the species. The study was conducted in a greenhouse, in randomized blocks, factorial 2 × 3 (two light...

Author(s): Ademir Kleber Morbeck De Oliveira, Sônia Cristina Juliano De Gualtieri, José Antônio Maior Bono, Valtecir Fernandes, Paula Thais Alves Ojeda and Rosemary Matias  

March 2018

Population fluctuation and infestation of Drosophila suzukii in berry crops in Southern Brazil

Drosophila suzukii is an insect pest with high capacity to cause damage to soft-skinned fruit whose behavior on host crops in Brazil is still unknown. This study aims to determine the population fluctuation of D. suzukii on different berry ¬¬¬¬¬¬crops from 2014 to 2017 and infestation. In each orchard, two traps containing attractant (biological yeast + sugar + water) were installed each week;...

Author(s): Daniela Fernanda Klesener, Régis Sivori Silva dos Santos, Luciano Gebler and Lucas de Ross Marchioretto  

March 2018

Maize ideotype breeding for changing environmental conditions

The demand for corn in the developing world will double by the end of 2050. The challenges due to the climate change are real. Where extreme weather events will become more frequent and climate change projections suggest that large yield losses occur in many regions of the world. Corn is cultivated throughout the world and is a strategic crop: can tolerate high radiation intensities and exhibits high efficiency in the...

Author(s): Khunsa Khakwani, Muhammad Rafique, Ahsan Raza Malhi, Muhammad Altaf, Saira Saleem and Muhammad Arshad  

March 2018

Precocious screening tests of the resistance of two varieties of cocoa seedlings (Theobroma cacao L.) from combinations of fertilizers against Phytophthora megakarya (Brasier and Griffin) in nursery

Experiments were conducted to appreciate the resistance level of cocoa seedlings aged three months from combinations of fertilizers against Phytophthora megakarya based on artificial leaf disk inoculation test. The two cocoa varieties involved were: Tafo 79/501 (V1) and SNK 13 (V2). For each variety, 11 treatments with three replicates were used on 33 randomly-selected plants. These include Arbuscular Mycorrhizal Fungi...

Author(s): Pélagie Djenatou, Yves Hernandez Tchétchoua, Philippe Kosma and Eddy Léonard Ngonkeu Magaptcheu,  

March 2018

Genetic divergence in Agave accessions through ISSR markers and phenotypic traits

The Agave genus is composed of about 200 species, but the cultivation of sisal for fiber production in Brazil is restricted to two species: Agave sisalana and Agave fourcroydes, both have several accessions with wide variability. The collection of Agave of Embrapa has 37 accessions maintained in situ and periodically evaluated agronomical traits. Most of these accessions have phenotypic similarities, although they...

Author(s): Silmara Chaves de Souza, José Jaime Vasconcelos Cavalcanti, Jean Pierre Cordeiro Ramos, Isaías Alves, Roseane Cavalcanti dos Santos and Liziane Maria de Lima  

March 2018

Perceptions and clustering of Greek farmers on the new CAP: Opportunity or threat?

This study aims to highlight the problems of the Greek agriculture and to identify the level of information that the farmers have regarding the Common Agricultural Policy (CAP). Here, primary data were collected from in-depth interviews (structured questionnaire) with 241 farmers in the region of Thessaly-Greece. The study was conducted in November 2016, within the geographical boundaries of the Region of Thessaly. The...

Author(s): George Theodossiou, Christos Karelakis and Apostolos Goulas  

March 2018

Cotton growth in response to water supply in red Latosol cerrado

There are few studies that demonstrate the influence of water stress in biometric variables and cotton growth. Thus, the objective of this study was to evaluate different levels of water supply in the BRS 2 cotton growth, in the field of Campus Rio Verde - GO, in 2015. Experimental design used was randomized blocks, with three replications in a split-plot scheme of 5 x 4 with five water replacements (WR) (25, 50, 75,...

Author(s): Vitor Marques Vidal, Frederico Antonio Loureiro Soares, Marconi Batista Teixeira, Fernando Nobre Cunha, Leonardo Nazário Silva dos Santos, Cicero Teixeira Silva Costa, Giovani Santos Moraes, Washington Bezerra, Gustavo da Silva Vieira, Wilker Alves Morais, Aurélio Ferreira Melo, Ana Carolina Oliveira Horschutz, Jenifer Kelly Ferreira dos Santos, Igor Olacir Fernandes Silva and Leandro Spíndola Pereira

March 2018

Diversity of insects in conventional and organic tomato crops (Solanum lycopersicum L., solanaceae)

This study aims to compare the diversity and relative abundance of insect families collected in organic and conventional tomato production systems located in Alagoas, Northeast Brazil (09°81'76"S and 36°59'42"W). In this region, the visible spectrum is quite broad with sunlight throughout the year. Between rows of tomato plants, we set up a system of colored traps colored blue, yellow, white,...

Author(s): Rubens Pessoa de Barros, Ligia Sampaio Reis, Isabelle Cristina Santos Magalhães, Miriany de Oliveira Pereira, Ana Cleia Barbosa de Lira, Claudio Galdino da Silva, Jaciara Maria Pereira e Silva, João Gomes da Costa and Elio Cesar Guzzo

March 2018

Efficacy of Xylopia aethiopica ethanolic and aqueous extracts on the control of Sitophilus oryzae in stored rice grain

Stored product insects reduced the quantity, quality, nutritive value and viability of stored crops such as maize, sorghum, wheat and rice. These pests and many others threaten food security. The study investigated the efficacy of Xylopia aethiopica in the control of Sitophilus oryzae on stored rice. The extracts of this plant were made using ethanol and aqueous as solvent and prepared at the concentrations of 3, 6, 8...

Author(s): Ekeh F. N., Odo G. E., Nzei J., Ngozi E., Ohanu C. and Onuoha O.

March 2018

Effects of lime, vermicompost and chemical P fertilizer on yield of maize in Ebantu District, Western highlands of Ethiopia

Integrated use of lime with organic and chemical fertilizers is considered as a good approach for sustainable crop production under acidic soils. Vermicompost (VC) and chemical phosphorus (P) fertilizer when used with lime play a vital role in enhancing productivity of acidic soils. Field experiments were conducted for two consecutive cropping seasons of 2015 and 2016 to evaluate the effects of lime, VC and chemical P...

Author(s): Abdissa Bekele, Kibebew Kibret, Bobe Bedadi, Tesfaye Balemi and Markku Yli-Halla

March 2018

Characterization and classification of salt affected soils and irrigation water in Tendaho sugarcane production farm, North-Eastern Rift Valley of Ethiopia

Considerable area of land is becoming unproductive every year because of salinity and sodicity in lowlands of Ethiopia. For sound land use and irrigation water management, it is a paramount important to know the chemical composition of soils and irrigation water. Therefore, the study was aimed to evaluate the physicochemical properties of soils and irrigation water of Tendaho sugarcane production farm, located in...

Author(s): Mulat Asmamaw, Ashenafi Haile, and Gezai Abera,  

March 2018

Effect of poultry litter biochar on Ultisol physical properties

A study was carried out to investigate the effect of biochar produced from the pyrolysis of poultry litter feedstock in some of the physical properties of a Yellow Red Argisol eutrophic typical (Ultisol), located in the municipality Lagoa Seca, State of Paraiba, Brazil, that is, granulometric analysis,  bulk density, porosity and available water capacity. Six doses of biochar (0; 10; 15; 20; 25 and 30 ton ha-1)...

Author(s): Lúcia Helena Garófalo Chaves, Washington Benevenuto de Lima, Iêde de Brito Chaves, Josué da Silva Buriti, Marcos Vinicius Lia Fook and José William de Lima Souza  

March 2018

Phosphorus adsorption and its relationship to the physical and chemical characteristics with different soil classes

In order to determine the characteristics of phosphorus adsorption using the Langmuir and Freundlich isotherms and its relationship with some of the chemical and physical properties of soils, a study was developed at the Embrapa Soil Laboratory with soil samples (0 - 30 cm) from four classes of topsoil: Orthic Chromic Luvisols, Eutrophic Cambisols, Fluvic Neossol and Eutrophic Cambisols Typical. The hyperbolic model of...

Author(s): José Félix de Brito Neto, Leonardo Theodoro Bull, André Luiz Pereira da Silva, Cláudio Silva Soares and Joaquim Alves de Lima Junior  

March 2018

Wet bulb dimensions associated with different flow and terrain declivity

Geometry information of wet bulb is important for the design of projects and management of drip irrigation, mainly to estimate the volume of wet soil, emitter flows and irrigation time. This study aims to determine the dimensions of wet bulb formed by drippers with different flow and terrain declivities. For this, soil moisture levels were determined throughout the soil profile after drip irrigation with three flow...

Author(s): José Antonio R. Souza, Débora A. Moreira, Leandro C. Salomão, Fernando F. Cunha, Renan S. Pedroso, Ellen L. Silva, Janine M. Gonçalves, João G. F. Rezende, João V. C. Costa and Jamerson F. Silva Filho

March 2018

Nitrogen fertilization applied through drip fertigation and broadcasted in blueberry crop

The aim of this experiment was to evaluate the effects of nitrogen fertilization on the blueberry crop throughout three consecutive years with different rates and ways of fertilizer application. The experiment was carried out in a commercial orchard located at the county of Vacaria-RS, in Southern Brazil utilizing the blueberry cultivar ‘Bluecrop’. The treatments consisted of the broadcasted nitrogen rates:...

Author(s): Leonardo Oliboni do Amaral, Elaine Damiani Conte, Lucas De Ross Marchioretto, Endrigo Soares Golin and Diego da Rocha Cavaletti  

February 2018

Studying the volatility effect of agricultural exports on agriculture share of GDP: The case of Egypt

This article aims to examine the long and short run relationship between agricultural exports and agriculture share of GDP. Links between series considered are assessed by co-integration analysis using Johansen co-integration technique and ECM-GARCH. Results indicate a positive link in the short and long term between agricultural exports and agriculture share of GDP, as well as co-integration between the pairs of series...

Author(s): Osama Ahmed, and Walid Sallam  

February 2018

Using the p-median location model to set up aerodromes for coverage fertilization of eucalyptus plantations

In this study an economic analysis was conducted to evaluate problem associated with a geographical information system (GIS) using facility location models for the p-median in order to optimize the location of aerodromes for the aerial fertilization (coverage fertilization) of eucalyptus plantations. The location model was tested on a 9,095.65 ha farm located in the Três Lagoas municipality in the Mato Grosso do...

Author(s): Leonardo Pereira Fardin, Helio Garcia Leite, Daniel Henrique Breda Binoti, Carlos Antonio Alvares Soares Ribeiro, Vicente Paulo Soares, Antonio Santana Ferraz, Márcio Bernardi and Aguida Beatriz Travaglia Viana  

February 2018

Optimum plot size for experiments with papaya genotypes in field

The objective of this study was to determine a suitable plot size for field experiments with papaya genotypes. Two experiments were carried out using a randomized complete block design with 11 and 12 papaya genotypes, respectively. In both experiments, plots consisted of one row, with 10 plants each. Spacing between rows was 3.5 m, with 1.5 m between plants. The characteristic evaluated was fruit production in t ha-1 in...

Author(s): Edilson Romais Schmildt, Adriel Lima Nascimento, Alan de Lima Nascimento, Karina Tiemi Hassuda dos Santos, Renan Garcia Malikouski, Omar Schmildt, Clemilton Alves da Silva, Geraldo Antônio Ferreguetti, Márcio Paulo Czepak and Julián Cuevas  

February 2018

Performance of five potato varieties with regards to growth and production of mini-tubers under an aeroponic system in central highlands of Kenya

There is limited information on the performance of Kenyan potato varieties under aeroponic systems. Experiments were therefore carried out at the Kenya Agricultural Research Institute (KARI), Tigoni, under an aeroponic system in 2012 and 2013 to evaluate the growth and mini-tubers production of five varieties commonly grown in Kenya and differ in vegetative and reproductive characteristics. The experiment was set up in...

Author(s): Miriam W. Mbiyu, Charles Lung’aho, Susan A. Otieno, Moses W. Nyongesa, Margaret N. Muchui, and Judith N. Ogemma  

February 2018

Assessment of the knowledge and use of pesticides by the tomato farmers in Mwea Region, Kenya

Current cultivation of vegetables to meet food security standards requires the use of pesticides which reduce losses from pests and diseases. A cross-sectional survey for pesticides use in tomato farms was conducted in Mwea, Kenya to assess the practices and constraints faced by the farmers. Gender, level of education, the use of pesticides in farms, experience in tomato farming, list of common pesticides, periodicity...

Author(s): J. H. Nguetti , J. K. Imungi, M. W. Okoth, J. Wang’ombe, W. F. Mbacham and S. E. Mitema  

February 2018

Definition of smallholder Sheko cattle keepers’ breeding objectives through phenotypic ranking and choice experiments in Ethiopia

This study aimed at identifying Sheko cattle keepers' preferences by way of phenotypic ranking and hypothetical choice experiment in their habitat in order to define the indigenous selection criteria. The ranking experiment report was based on 15 cows and 6 to 9 bulls. Three animals of the same sex were randomly assigned in one group that resulted into five groups for cows and two to three groups for bulls. Thirty...

Author(s): Elias Bayou, Aynalem Haile, Solomon Gizaw and Yoseph Mekasha  

February 2018

Growth and physiological responses of coffee (Coffea arabica L.) seedlings irrigated with diluted deep sea water

Concentrations of 5, 10, 20, and 40% deep sea water (DSW) were tested, with irrigation water serving as the 0% control (tap water) on coffee (Coffea arabica L.) seedlings. The results showed that the growth parameters were affected significantly (α < 0.05) by the irrigation of 20 and 40% deep sea water. There were significant differences (α < 0.05) among treatments in stomata density/mm2, stomata...

Author(s): Mesfin Haile and Won Hee Kang

February 2018

Sole and combined effect of three botanicals against cowpea seed bruchid, Callosobruchus maculatus Fabricius

The bioactivity of three botanical powders in sole and combination against Callosobruchus maculatus (Fab.) was investigated at 29±3°C and relative humidity (R.H.) OF 65+5% in the laboratory. The appropriate mixing ratio of Cymbopogon citratus (C), Alstonia boonei (A) and Hyptis suaveolens  involved seven  combinations viz., C:A, C:H, A:H, C:A:H, H2:C:A, A:C2:H, H:C:A2 in simple ratios 1:1, 1:1, 1:1,...

Author(s): O. M. Azeez and O. O. R. Pitan  

February 2018

Land use effects on soil erodibility and hydraulic conductivity in Akure, Nigeria

This research was carried out to investigate the effects of three land use categories (grazed, cropped and forest land) on soil erodibility and hydraulic conductivity. Hydraulic conductivity was determined by a steady‐state flow using a mini‐disk infiltrometer while soil erodibility was determined following the Wischmeier and Smith equation. A suction rate of 2 cm s-1 was chosen for field infiltration measurement and...

Author(s): Yusuf Habeeb Ajibola, Oguntunde Philip Gbenro, and Lawal Abosede Khadijah  

February 2018

Evaluation of the effect of genotype, environment and genotype X environment interaction on white common bean varieties using additive main effect and multiplicative interaction (AMMI) analysis in the mid-altitude of Bale zone, Southeastern Ethiopia

Twelve white common bean genotypes were evaluated along two checks at three diverse locations in the mid-altitude of Bale zone, southeastern Ethiopia for two consecutive years 2014 and 2015 in order to determine their stability. The genotype by environment interaction (GEI) has an influence on the selection and recommendation of cultivars. The objective of this work was to see the effect of GEI and evaluate the...

Author(s): Tadele Tadesse, Amanuel Tekalign, Behailu Mulugeta and Gashaw Sefera  

February 2018

Characterization of livestock farming in Jacaré dos Homens, Alagoas, Brazil

Dairy farming is one of the most significant activities for Brazilian agribusiness, especially for its diversity and breadth. This study aimed to analyze the characterization of dairy farming activity developed in the Baixas community, in the city of Jacaré dos Homens-AL, Brazil, raising information about the production system adopted and considering the relevance of this activity to the locality. The research...

Author(s): Cristian Cavalcante Félix da Silva, José Crisólogo de Sales Silva, André Maia Gomes Lages, Sandrine Cíntia Amorim de Barros White and Marília Ferro Marques Cavalcante  

February 2018

Phytosociology of weed community in two vegetable growing systems

The aim of this study was to perform a phytosociological survey of the weed community present in organic and conventional vegetable growing systems conducted in Alagoas state, in Brazil. The survey was carried out from February 2014 to January 2016, within which 30 samplings were made. The evaluated parameters were given by the calculation of frequency, density, abundance, relative frequency, relative density,...

Author(s): Rubens Pessoa De Barros, Ligia Sampaio Reis, Isabelle Cristina Santos Magalhães, Wanderson Ferreira Da Silva, João Gomes Da Costa and Aldenir Feitosa Dos Santos  

February 2018

Role of climate change awareness in sustainable soil nutrient management by smallholder farms in Burkina Faso

Climate change effects are threats to the livelihood of Sub-Saharan smallholder farms. Farmers’ response and readiness to take adaptive measures depend on how they perceive (perception) and moreover understand and recognize the causes (awareness) of climate change. Most studies used interchangeably perception and awareness to climate change. Taking the example of soil nutrient management, this study demonstrated...

Author(s): Boundia Alexandre Thiombiano, Dénis Ouédraogo, Quang Bao Le and Samuel Nii Odai  

February 2018

Effect of Pseudomonas putida on chrysanthemum growth under greenhouse and field conditions

Chrysanthemum production stands out in ornamental plants market and several techniques can improve the production of this plant. Among them, is the use of beneficial microorganisms such as plant growth promoting rhizobacteria (PGPR); however, the use of PGPR has not been explored enough so far in chrysanthemum production, especially in field conditions. With regards to rhizobacteria, the group, Pseudomonas, can be...

Author(s): Matheus A. P. Cipriano and Sueli S. Freitas  

February 2018

Sustainable and technological strategies for basic cereal crops in the face of climate change: A literature review

At the international level, corn, wheat and rice are basic grains considered to be the most important food source for humans, as they are a fundamental part of the daily diet and represent more than 55% of the caloric intake. They make up the greater production and consumption in the world. Due to Climate Change, these highly vulnerable crops to extreme temperatures have suffered a reduction in quality and quantity of...

Author(s): Silvia Soledad Moreno Gutiérrez, Alfredo Toriz Palacios, Jorge A. Ruiz-Vanoye and Sócrates López Pérez

February 2018

Litter production in a natural stand of Brazil nut trees (Bertholletia excelsa Bonpl.)

This research estimated litter production and analyzed its relation to environmental variables such as maximum temperature, insolation, and rainfall. The study was conducted on a 300 × 300 m experiment as part of the project titled mapping of native Brazil nut stands and socio-environmental and economic characterization of Brazil nut production systems (MapCast), in the Tapajós National Forest (FLONA...

Author(s): Quêzia Leandro de Moura Guerreiro, Raimundo Cosme de Oliveira Júnior, Maria de Lourdes Pinheiro Ruivo, Katia Emidio da Silva, Troy Patrick Beldini, Marcelino Carneiro Guedes, Amanda Fabricia Leão Mota, Brenda Lohana Teixeira de Moraes, Paulo Roberto Brasil Santos and Izabela Moura Duin

February 2018

Higher K+/Na+ and lower reactive oxygen species and lipid peroxidation are related to higher yield in maize under saline condition

Thirty six single cross hybrids with six commercial checks were evaluated for yield performance along with earliness, plant height and ear height. The mean performance for days to tasseling and days to silking were significantly different among the hybrids. Considering the yield, Kaberi 50 and Pioneer 3396 were found as the best and the second best check, respectively. None of the hybrids produced higher yield compared...

Author(s): Rohman M. M., Islam M. R., , Mahmuda B. M., Begum S., Fakir O. A. and Amiruzzaman M.

February 2018

Genetic diversity study of some banana genotypes collected from various parts of India through RAPD analysis

Globally, banana is the fourth most important fruit crop and is grown in more than 130 countries across the world. Traditional procedure to characterize banana plants by morphological descriptors has many limitations, and different communities refer to the same local cultivars by different names due to lack of clear clone identity resulting in unnecessary duplication with regard to cultivation, conservation and...

Author(s): Prasenjit Kundu, Fatik Kumar Bauri and Sutanu Maji

February 2018

Screening of wheat germplasm for seed associated fungi in geographical areas of Pakistan

One hundred wheat (Triticum aestivum L.) accessions were selected on the basis of different geographical areas of Pakistan. Isolation and identification of seed born fungi were conducted according to standard blotter test and a total of five major seed borne fungi including Alternaria alternata, Aspergillus niger, Fusarium species, Drechslera species and Phytophthora species were isolated from the wheat seeds. The...

Author(s): Attiq-ur-Rahman, Riffat Tahira, Aqleem Abbas, Shahid Iqbal, Israr Ahmad and Waseem Ahmad

February 2018

Gas exchange and yield of Prata-type banana plants with fertilizer sources for organic management

The aim of this paper is to evaluate gas exchanges and yield of Prata-type banana plants subjected to fertilizer sources for organic management in soil with improved fertility. Two cultivars (‘Dwarf-Prata’ and ‘BRS Platina’), 5 K2O rates (0, 200, 400, 600, and 800 kg ha-1 year-1) supplied by cattle manure and Naturalplus® rock powder, and 2 evaluation times (8:00 am and 2:00 pm) were arranged...

Author(s): Pedro Ricardo Rocha Marques, Sergio Luiz Rodrigues Donato, Abel Rebouças São José and Raul Castro Carriello Rosa

January 2018

Maize leaf area estimation in different growth stages based on allometric descriptors

The literature points out the need for leaf area (LA) calibration models that are suitable for specific varieties (variety-specific). These models should be capable of coping with different crop conditions, growth stages, and agronomic practices. The objective of the current study was to develop a model for estimating the LA of ​​maize (Zea mays L.), considering the entire growth cycle, based on non-destructive...

Author(s): Sosdito Estevão Mananze,, Isabel Pôças, and Mario Cunha,  

January 2018

Development of a crop growth subroutine for the Watershed Resources Management (WRM) model

Vegetation has a marked effect on runoff and soil moisture and plays an important the hydrologic cycle. The Watershed Resources Management (WRM) model, a process-based, continuous, distributed parameter simulation model developed for hydrologic and soil erosion studies at the watershed scale lack a crop growth component. As such, this model assumes a constant parameter values for vegetation and hydraulic parameters...

Author(s): Ogbu K. N., Mbajiorgu C. C., Ugwuoke K. and Ndulue E. L.

January 2018

Effect of planting date on tepary bean yield and yield components sown in Southern Botswana

Tepary bean is a crop that is slowly gaining momentum into the cropping system of Botswana. A study was conducted to determine the effect of planting date on yield and yield components of tepary bean and identify the optimum sowing of the crop. A rain-fed experiment was conducted for two seasons (2012 to 2014), using a randomized complete block design replicated three times in a split plot with three sowing dates in...

Author(s): Odireleng O. Molosiwa and Sylvia B. Kgokong

January 2018

Soybean hull and/or white oat grain for steers finished in feedlot

The aim of this study is to evaluate the performance of feedlot finished steers receiving grain oat and/or soybean hull in their diet. Thirty six Nellore crossbred with Charolais steers, that received diet with concentrate ratio of 50:50 in all diets independently of the treatment, with sorghum silage as forage and concentrate according to the proposed treatment: soybean hull, oat grain and a mixed concentrate with...

Author(s): Guilherme Joner, Dari Celestino Alves Filho, Andrei Retamoso Mayer, Ana Paula Machado Martini, Gilmar dos Santos Cardoso, Camille Carijo Domingues, Mauren Burin da Silva, Patrícia Machado Martini, Joziane Michelon Cocco and Ivan Luiz Brondani

January 2018

Rhizome development in Sorghum bicolor × Sorghum halepense families in the tropical ecosystem of Uganda

Many landraces and improved cultivars of sorghum (Sorghum bicolor) grown in Uganda have late maturity and are susceptible to several biotic and abiotic stresses. Introgression of the rhizomatous trait from perennial sorghum (Sorghum halepense) could improve stress tolerance. However, phenotypic characterization of exotic perennial sorghum germplasm under Ugandan environmental conditions is essential to select desirable...

Author(s): Shakirah Nakasagga, Moses Biruma, Geoffrey Tusiime, Pheonah Nabukalu and Stan Cox

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