African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6668

AJAR Articles

Leaf organic content variation of 2 durum wheat genotypes under water stress by applying phytohormone (IAA)

October 2020

Water stress is the most important problem in plant growth and development. Greenhouse trial is carried out on 2 durum wheat (Triticum durum Desf) genotypes (MBB and WAHA), to evaluate the effect of water stress on the biochemical content of leaves, and the possibility of reducing this effect by applying a growth regulator Indole-3-acetic acid (IAA) by seeds soaking and foliar spraying. Water stress causes a large...

Author(s): A. Bendjama and S. Ramdani  

Agronomic and economic evaluation of phosphate fertilizer use in maize-bean cropping systems in Western Kenya

October 2020

Effects of phosphorus rate and crop arrangement on yields and economic benefits in maize-bean cropping systems were investigated for two seasons: Short rains (SR) of 2015 and long rains (LR) of 2016 in Western Kenya. A split plot design with five crop arrangements in the main plots; one row of maize and beans alternating (conventional), maize and beans planted in the same hole (SH), two rows of maize alternating with...

Author(s): Dorcus Ofuyo, Peter Opala and George Odhiambo

Comparing productivity of rice under system of rice intensification and conventional flooding: A switching regression approach

October 2020

This paper examined the factors influencing rice productivity in Mwea Irrigation Scheme using the System of rice intensification (SRI) and conventional flooding (CF). Stratified sampling was used to obtain 364 smallholder rice farmers for interviewing. Data collection was done with the aid of a semi-structured questionnaire and analyzed using the Endogenous Switching regression Model (ESRM).  The results of ESRM...

Author(s): Francis K. Kaloi, Hezron N. Isaboke, Charles N. Onyari and Lucy K. Njeru  

Evaluation of a motorized cassava peeler with four lining materials

October 2020

Cassava processing requires peeling, which is mainly done manually and not effective for large scale processing, hence, the need to mechanise the peeling process. A motorized cassava peeler with four drum and disc linings (concrete, metal, rubber and wood) was designed. The prototype was tested at three disc speeds; (250, 350 and 500 rpm) to determine peeling capacity, peel removal efficiency, and flesh loss. The...

Author(s): Ishmael Nartey Amanor and Emmanuel Yaovi Hunnuor Bobobee  

Cultural practices and pesticides contamination level of tomato in two gardening sites in the region of Boucle du Mouhoun, Burkina Faso

October 2020

The present study consisted of evaluation of cultural practices and pesticides contamination level of tomato in some gardening sites in the region of Boucle du Mouhoun (Burkina Faso). A survey of phytosanitary practices among 30 producers was carried out at the Di and Dedougou sites. The pesticide contamination level of tomatoes collected was determined by the QuEChERS method. The survey revealed a low level of literacy...

Author(s): Abdoudramane SANOU, Kiessoun KONATE, Hemayoro SAMA, Roger DAKUYO, Kabakdé KABORE, Mamounata DIAO, Crépin Ibingou DIBALA and Mamoudou Hama DICKO  

Spatiotemporal hotspot patterns of wheat rust incidence and severity in Ethiopia

September 2020

Wheat rusts, stem rust, leaf rust, and stripe or yellow rust are the major biotic constraints in all wheat-growing regions of Ethiopia. Therefore, the main objective of this study is to identify the temporal-spatial hot spot pattern of wheat rust incidence and severity in Ethiopia. A GIS-based hotspot analysis tool was employed to identify the spatial distribution of hot spot patterns and temporal trends using survey...

Author(s): Abu Tolcha, Olika Dessalegn, Almaz Nigussie and Degefie Tibebe    

Depletion of phosphate rock reserves and world food crisis: Reality or hoax?

September 2020

Phosphate rock (PR) deposits are the major source of phosphate (P) fertilizers for soil fertility replenishment. The demand for P fertilizers in the year 2014 was 42,706,000 tons and was expected to reach 46,648,000 tons in 2018. Majority of PR deposits are found in only a few countries including Morocco, USA and China. There is however conflicting information on the extent of world PR reserves, therefore, complicating...

Author(s): Kisinyo Peter Oloo and Opala Peter Asbon  

Growth performance of royal purple and white guinea fowl varieties and their crosses under an intensive management system

September 2020

Commercialization of guinea fowl production in many countries is growing and the demand for their meat is high. The study evaluated the growth of crossbred royal purple x white variety relative to purebred royal purple and white varieties. Twenty pure-bred white, 20 purebred royal purple and 20 cross-bred keets were housed together in 4 houses resulting in 4 replications. The keets were fed broiler starter crumbs from...

Author(s): Patrick Kgwatalala, Freddy Manyeula and Candy Sefemo  

Pastoral farming system and its temporal shift: A case of Borana zone, Oromia National Regional State, Ethiopia

September 2020

The study was conducted in Borana zone, which is located at about 570 km from Addis Ababa with the objective of understanding the farming system of Borana pastoral area. The primary data was collected using survey questionnaires from 160 households selected using multistage sampling design. The study confirmed that the farming system in Borana pastoral area has been increasingly diluted, unlike the earlier decades where...

Author(s): Dirriba Mengistu, Simbone Tefera and Bely Biru  

Evaluation of blended fertilizer on growth performance and yield of onion (Allium cepa L.) at irrigated conditions Tselemti District North Western Tigray, Ethiopia

September 2020

Onion has economically important crop in the study area. However, its low production is due to poor soil fertility management. Thus, the present study was initiated to determine the optimal rate of blended fertilizer required for onion production. A field experiment was conducted for two consecutive years during 2018 and 2019 at farmer's field Tselemti district, the experiment had 8 treatments arranged in a...

Author(s): Solomon Mebrahtom, Kinfe Tekulu, Tewolde Berhe, Tsadik Tadele, Weldegebreal Gebrehiwot, Gebresemaeti Kahsu, Samrawit Mebrahtu and Goitom Aregawi  

Household determinants of food security in rural Central Uganda

September 2020

This study contributes to the literature by presenting empirical evidence on the drivers of rural household food security, which is critical for food security policy implementation. We used household survey data collected from 265 households from rural central Uganda, and a binary logistic regression model to estimate the determinants of household food security. Households with more land size, no livestock, and smaller...

Author(s): John Baptist Semazzi and Moses Kakungulu  

Banana pest risk assessment along banana trade axes running from low to high altitude sites, in the Eastern DR Congo and in Burundi

September 2020

Pests and diseases greatly contribute to the decline in banana yields, food and income insecurity in the Great Lakes region of Africa. Understanding people’s role in pest and disease spread at landscape level is crucial for effective pest and disease management. To determine this, focus group discussions (FGDs) targeting 10 experienced farmers (50% female and 50% male) were conducted in 27 villages along four...

Author(s): Guy Blomme, Walter Ocimati, Serge Amato, Alexandra zum Felde, Muller Kamira, Mariam Bumba, Liliane Bahati, Daniel Amini and Jules Ntamwira    

Enhancing maize production in a Striga infested environment through weed management practices, sowing date and improved crop varieties

September 2020

A two-year investigation into the effects of weed management practices, sowing dates and maize varieties was made in a Striga endemic field at Minna, Nigeria. The treatment was a factorial combination of variety (SAMMAZ 15, 17, 37, 40 and SUWAN-1-SR-Y), weed management practices (weedy check, two hoe weeding (HW) at 3 + 6 weeks after sowing (WAS), pre-emergence (PE) Atrazine at 2.4 kg a.i ha-1 + 1 HW at 6 WAS and PE...

Author(s): Aliyu Baba Mohammed, Emmanuel Daniya and Musa Gimba Matthew Kolo  

Floral activity of Apis mellifera (Hymenoptera: Apidae) on Bidens steppia (Asteraceae), Cordia africana (Boraginaceae), Pittosporum viridiflorum (Pittosporaceae) and Psychotria mahonii (Rubiaceae) in Nyambaka (Adamawa, Cameroon)

September 2020

Experiments were conducted at Nyambaka in the Adamawa Region of Cameroon, from March 2017 to November 2018, for assessing the apicultural potential of Bidens steppia, Cordia africana, Pittosporum viridiflorum and Psychotria mahonii. In order to improve the beekeeping productivity, it is important to investigate the diversity of bee plants in a given apiary site. To that end, the foraging behaviour of Apis mellifera...

Author(s): Nentcherse Mbere, Michelson Azo’o Ela, Tchobsala, and Fernand-Nestor Tchuenguem Fohouo  

Impact of native arbuscular mycorrhizal fungi based fertilizers on to increase maize productivity in North Benin

September 2020

Mycorrhizae are symbiotic associations between fungi and host plants, which confer several advantages, including good mineral nutrition. Arbuscular mycorrhizal fungi (AMF) then present an effective alternative in order to develop a sustainable agriculture that is less dependent on mineral fertilizers. The objective of this study was to assess the impact of organic fertilizers based on native arbuscular mycorrhizal fungi...

Author(s): Abdel D. KODA, Gustave DAGBENONBAKIN, Françoise ASSOGBA, Nadège A. AGBODJATO, Christine N’TCHA, Sylvestre ASSOGBA, Ricardos M. AGUEGUE, Aude E. KELOMEY, Adolphe ADJANOHOUN and Lamine BABA-MOUSSA  

Effect of potassium on yield and growth of Enset (Ensete ventricosum (Welw.) Cheesman) in Dale District, Sidama Region, Ethiopia

September 2020

Only limited work has been done on fertilizer requirement of Enset crop. An experiment was conducted in Dale district, Sidama region, Ethiopia to investigate the response of Enset to potassium (K) fertilizer for two years (2016-2018). The treatments were: 0, 80, 150 and 200 kg K/ha as potassium chloride (KCl), single levels of phosphorus (P) (20 kg/ha), sulfur (S) (11.15 kg/ha) and boron (B) (0.57 kg/ha) as blended NPSB...

Author(s): Kibreselassie Daniel and Suh-Yong Chung  

Field evaluation of introduced and local cowpea genotypes performance in Botswana

September 2020

A set of twenty four cowpea (Vigna unguiculata L. Walp) genotypes were evaluated in field conditions for three consequtive seasons based on 13 quantitative characters. A combined analysis of variance revealed a highly significant difference among the genotypes for most of the traits (P <0.001). Introduced genotypes performed better in nine of the characters, revealing the advantage of introduced genotypes. Principal...

Author(s): Odireleng O. Molosiwa and Bose C. Makwala  

Effect of different planting techniques and sowing density rates on the development of quinoa

September 2020

Quinoa (Chenopodium quinoa Willd.) is a crop of increasing interest due to its agro-ecological adaptability and high nutritional properties. Few information is available on the adaptability of quinoa in the Sahel region, and on genotype’s phenological, morphological and agronomical responses to different planting methods and sowing density rates. To test the effect of planting and sowing methods, two separate...

Author(s): Abdalla Dao, Jorge Alvar-Beltrán, Abdou Gnanda, Amidou Guira, Louis Nebie and Jacob Sanou  

Phenotyping sorghum [Sorghum bicolor (L.) Moench] for drought tolerance with special emphasis to root angle

August 2020

The study was conducted to characterize early maturing sorghum genotypes under moisture stress and non-stress environments based on root angle. Phenotyping of 23 early maturing sorghum genotypes was carried out under post-flowering moisture stress and non-stressed environment using randomized complete block design (RCBD) in two replications at Werer Agricultural Research Center in 2018 off season. The genotypes were...

Author(s): Firezer Girma, Firew Mekbib, Taye Tadesse, Temesgen Menamo and Kassahun Bantte  

Grass species for range rehabilitation: Perceptions of a pastoral community in Narok North sub-county, Kenya

August 2020

Land degradation is a global problem leading to a diminished production capacity of the rangelands. The consequence is reduced potential to provide ecosystem services and increased vulnerability to the inhabitants. Biological soil water conservation measures can reverse the trend. Different communities prefer different grass species for rehabilitation as communities vary in location, needs, priorities, preferences and...

Author(s): Kamau, Hannah Nyakio, Koech, Oscar Kipchirhir, Mureithi, Stephen Mwangi, Wasonga, Oliver Vivian and Gachene, Charles Karanja Kabiru  

Intrapopulation phenotypic variation in Piartal (Chenopodium quinoa Willd.) from the Department of Boyacá, Colombia

August 2020

Chenopodium quinoa Willd., is an interesting plant with a great adaptation to adverse environmental factors and exceptional nutritional qualities. It shows great genetic variation, which organization remains poorly documented. In Boyacá, there are few studies on the morphological characterization of cultivated materials, and there is no certified planting material, resulting that the farmers are planting a...

Author(s): Ana Cruz Morillo C., Elsa Helena Manjarres H., Wendy Lorena R. and Yacenia Morillo C.  

Quantitative trait loci (QTL) mapping of resistance to coffee berry disease (Colletotrichum kahawae Waller & Bridge) in Coffea arabica L. variety Rume Sudan

August 2020

Coffee Berry Disease (CBD) is a major constraint that limits Coffea arabica production, whose resistance is governed by three genes, T, R that are dominant and recessive k in varieties Hibrido de Timor (HDT), Rume Sudan (RS) and K7 respectively. This study identified the genomic region occupied by R-gene using F2 genotypes from varieties RS and SL28; and Single Nucleotide Polymorphic (SNP) markers obtained through...

Author(s): James Mwita Gimase, Wilson Muriithi Thagana, Chrispine Ogutu Omondi, Jane Jerono Cheserek, Bernard Mukiri Gichimu  and Elijah Kathurima Gichuru  

A literature review on yield gaps of various root, tuber and banana crops as a background for assessing banana yield reductions due to pests and diseases at a field site in western Burundi

August 2020

Banana pests (corm weevil and root nematodes) and diseases (Xanthomonas wilt of banana, banana bunchy top disease and fusarium wilt) are major constraints to banana production in Central Africa. The pests cause various degrees of yield reduction, while plants affected by three of the diseases eventually die before producing an edible bunch. Studies on yield gaps for most of these constraints are currently limited. This...

Author(s): Guy Blomme, Walter Ocimati, Alexandra Zum Felde, David Amwonya and Deo Kantungeko

Constraints limiting the improvement of manure management as climate smart technology for smallholder dairy farmers

August 2020

The global quest for a sustainable bio-economy has brought to the fore importance of engaging agricultural systems in the production and in practice change. There have been issues limiting farmers from improving the practice of manure management as smart climate technology. The objective of this paper was to highlight the constraints, type, and valuation of manure types and information sources that smallholder dairy...

Author(s): Jesse O. Owino¬, , Daniel Olago, Shem O. Wandiga and Asaah Ndambi  

Inhibition of root growth as mode of action of two rice yellow mottle virus pathotypes isolated in Mali

August 2020

In Mali, the economy is mainly based on agriculture. Rice contributes about 5% of the GDP and constitutes a strategic sector with enormous potential. Despite its strategic importance, rice cultivation faces multiple biotic constraints among which rice yellow mottle virus disease is the most important one with an incidence varying from 60 to 100%. To reduce yield loses due to this disease, we determined the mode of...

Author(s): Bakaye Doumbia, Amadou Hamadoun Babana, Sognan Dao, Salimatou Samaké, Adounigna Kassogué, Rokiatou Fané, Valacia Lemes Da Silva Lobo, Diakaridia Traoré, Stephen Machado and Linda Kinkle  

Retrospective study of the contamination of exported sesame by Salmonella species from 2007 to 2017 in Burkina Faso

August 2020

Sesame (Sesamum indicum) is one of the oldest and most traditional oilseed crops, valued for its high-quality seed oil. This culture was introduced in Burkina Faso at the beginning of the 20th century where it occupies a place of cash crop. The majority of sesame produced in Burkina Faso is export oriented. However, the contamination by Salmonella remains an unsolved problem. This retrospective study was carried out in...

Author(s): Muller K. A. Compaoré, Virginie Marie Yougbaré, René Dembélé, Fulbert Nikièma, Kabré Elie, and Nicolas Barro  

Global analysis of millet-based household farms: Characterization of the Senegalese production system of Niayes and Groundnut basin areas

August 2020

Niayes and Groundnut basin areas are among the largest strongholds of rainfed agriculture in Senegal. In the agricultural holdings of both agro-ecological areas, main speculations are far from optimizing their agronomic production potential. In order to analyze the organizational capacity and decision-making processes of producers, a global agronomic diagnostic work was undertaken out on the scale of 180 agricultural...

Author(s): Diallo Mountakha, Ndir Khadidiatou, Diop Amadou M., Dieye Bineta and Ndiaye Saliou  

Impact of soil management and irrigation techniques on water use efficiency in cauliflower cultivation

August 2020

The objective of this research is to evaluate the impact of soil management and localized irrigation techniques on water use efficiency in the cultivation of cauliflower. The treatments consisted of 4 different types of soil management: Direct seeding using crotalaria and brachiaria cover crops, a treatment used both in conjunction, and another that employed a conventional system. Two different irrigation techniques...

Author(s): Amilcar Isidro Servín Niz, Luciano Oliveira Geisenhoff, Guilherme Augusto Biscaro, Dhoni Meurer, Modesto Osmar Da Silva Oviedo, Eulalio Morel López, Oscar Luis Caballero Casuriaga and Hugo González Villalba  

An update of sweet potato viral disease incidence and spread in Ethiopia

August 2020

Sweet potato (Ipomoea batatas (L.) Lam.) is an important root crop for poor farmers in developing countries. Since the late 1980s, viral diseases have increasingly become a threat to sweet potato production in Ethiopia. This review paper presents the role of sweet potato production for ensuring food security, the level of sweet potato virus research, including the types of viral species identified and their current...

Author(s): D. H. Buko, A. Gedebo, C. Spetz and A. K. Hvoslef-Eide  

Performance of faba bean (Vicia faba L.) varieties grown under broomrape (Orobanche spp.) infestation in South Tigray, Ethiopia

August 2020

Broomrapes (Orobanche spp.) are the serious roots parasitic weed to legumes crop production in many countries. In Ethiopia, Orobanche crenata is a dominant parasite and a major constraint to faba bean (Vicia faba L.) cultivation, especially in the Northern parts of the country. Presently, it reduces crop production and has forced farmers to stop growing faba bean crop. Thus, it is necessary to find new sources of...

Author(s): Lemma Diriba, Firew Mekbib and Mussa Jarso  

Participatory upland rice (Oryza sativa L.) seed rate determination for row method of sowing under irrigated eco-system

August 2020

A field experiment was conducted in 2013 cropping season at Bedloale and Werer sites in Amibara district, Afar Regional State, to determine optimum seeding rate for row method of sowing for productivity of rice (Oryza sativa L.) under irrigated ecosystem. The experiment was conducted with five levels of seed rate treatments (50, 60, 70, and 80 kg ha-1 and local practice) laid out in a randomized complete block design...

Author(s): Fikeremariam Tegegn, Tamiru Dejen, Brehanu Woldu, Getnet Belay and Adem Kedir  

Influence of distance between plants and pruning of axillary buds on morphological and productive characteristics of tomato plants

August 2020

This research was carried out for 120 days in the horticulture area of the Universidad Nacional de Concepción, Facultad de Ciencias Agrarias to evaluate how morphological and productive characteristics of tomato plants were influenced by the distance between plants and the pruning of axillary buds. The design used in the experiment was the randomized block method with factorial arrangement (3x3); factor A was the...

Author(s): Oscar Caballero Casuriaga, Eulalio Morel López, Pabla Arguello Arguello, Amílcar Isidro Servín Niz, Modesto Osmar DaSilva Oviedo, Wilfrido Lugo Pereira, Derlys Fernando López Ávalos, Adolfo Leguizamón and Ruth Pistilli de Franco

Effect of scattered tree species on the diversity, abundance and biomass of pastures in a sedentary grazing system in South-western Uganda

August 2020

Tree species play a significant role in sustaining the productivity of grazing lands. However, information on appropriate species to use in restoring degraded grazing areas is limited. This study used 120 trees to assess the effect of 8 tree species on pasture diversity, abundance and biomass. This was done in a total of 960 quadrats of 1 m2 established under tree canopies and 5 m away from the edge of tree canopies. In...

Author(s): Dina Nabasumba, Halid Kirunda, Robert Muzira, Gershom Tugume, Steven Natuha and Geoffrey Akiiki Beyihayo  

Relationship between leaf rolling and some physiological parameters in durum wheat under water stress

July 2020

Durum wheat is an important staple food in Morocco. Wheat and barley are mostly grown in drought prone areas in this country. Drought is the most limiting factor under Mediterranean climate. Leaf rolling ability has been identified as a potential selection criterion for drought tolerance in cereals. The objective of this study is to test this hypothesis. The role of leaf rolling in water stress tolerance was assessed in...

Author(s): Amal Ben-Amar, Said Mahboub, Abdelaziz Bouizgaren, Mohammed Mouradi, Nasser Elhaq Nsarellah and Keltoum El Bouhmadi  

Assessment of genetic variability for yield and attributed traits among rice doubled haploid (DH) lines in semi-arid zone Sudan

July 2020

Anther culture is one of the biotechnology tools using for quick recovery of fixed breeding pure lines in rice. The development of new rice varieties is highly dependent on genetic diversity in desirable agronomic traits. Therefore, this study aimed to identify potential genotypes having the characters of Tongil-type and to study suitable traits of tested Double Haploid (DH) lines which can be applied in breeding...

Author(s): Khalid A. Osman, Kyung-Ho Kang, Ahmed A. El-Siddg, Yassir M. Ahmed and Sara M. Abdalla  

Growth and yield of finger millet (Eleusine coracana L.) (Garten) as affected by varying nitrogen levels at Mubi, Adamawa State, Nigeria

July 2020

A field experiment was conducted at the Teaching and Research Farm of the Adamawa State College of Agriculture at Mubi, Nigeria to determine effect of Nitrogen fertilization on the growth and yield of Finger Millet (Eleusine coracana L. (Garten). Results indicated that all the growth and yield components were significantly (p ≤ 0.05) influenced by increasing nitrogen fertilizer application rates. The highest...

Author(s): Hussaini, I. Danjuma, Mohammed, Aminu, Bassi, A. Nuhu, Hassan, Ismaila and Aliyu, M. Abubakar  

Effect of agricultural wastes on some soil physicochemical properties of ultisol, growth parameters and yield of cocoyam (Xanthosoma mafafa) at Umudike, southeastern Nigeria

July 2020

This research was conducted on a degraded Ultisol at the Eastern farm of Michael Okpara University of Agriculture, Umudike during 2014 and 2015 planting seasons, to determine the effect of different rates of sawdust and poultry manure application on soil physicochemical properties of acid sandy Ultisol, and growth and yield of cocoyam. The treatments comprised of two organic amendments at five levels each: Sawdust (0,...

Author(s): Iroegbu Chidinma Susan, Asawalam Damian O., Dada Olasunkanmi and Orji Jephter E.  

Market prospects and willingness to pay for indigenous products: The case of Morama (Tylosema esculentum)

July 2020

This study analyzes the market potential of the underutilized indigenous Morama (Tylosema esculentum) products by determining the consumers’ preferences and willingness to pay. Simple random sampling was used to select 372 respondents to participate in the cross-sectional survey. Contingent valuation method was used to determine the customers’ willingness to pay and the two-step Heckman selection model was...

Author(s): Keneilwe Kgosikoma, Lesego Mackenzie-Tsedi, Bernard Kelebang and Tlhalefo Ranchobolo  

Physical and mechanical properties of cement bonded strand board produced from Gmelina arborea (Roxb.) harvesting residues

July 2020

Finding use for residues from felling operations has been a major focus on increasing volume recovery of harvested woody biomass. Strands and sawdust processed from left-over of Gmelina arborea residues recovered from the forest were used to produce cement bonded composites. Physical and mechanical properties of the boards were assessed showing the relationship between diverse variables such as density, wood strand and...

Author(s): Owoyemi J. M., Ogunrinde O. S. and Oyeleye I. O.  

Agroclimatic risk zoning of mango (Mangifera indica) in the hydrographic basin of Paraná River III, Brazil

July 2020

Mango cultivation is one of the key economic agricultural activities of fruit in Brazil. In Southern Brazil, mango presents vulnerability thanks to its frost sensitivity, indicating the relevance of climate studies to improve the production and agricultural techniques, in the context of sustainable agriculture and climate change. Agroclimatic zoning should be one of the first information to be considered when starting...

Author(s): Nathan Felipe da Silva Caldana, Pablo Ricardo Nitsche, Luiz Gustavo Batista Ferreira, Alan Carlos Martelócio, Paulo Henrique Caramori, Paulo Vicente Contador Zaccheo and Jorge Alberto Martins  

Relative costs and benefits of implementing desiccant bead drying/hermetic storage and alternative drying and storage technologies for vegetable seeds in Kenya and Tanzania

July 2020

This paper assesses the relative costs and benefits of desiccant beads drying/hermetic storage and alternative drying and storage technologies. The study was conducted in Kenya and Tanzania in areas producing and trading vegetable seeds using a sample size of 280 respondents. The study revealed that costs of desiccant bead drying/hermetic storage are relatively higher for smaller quantities of seeds compared to...

Author(s): Richard O. Musebe, Daniel Karanja, Kent J. Bradford and Roger Day  

Evaluation of cowpea rust disease incidence and severity on selected cowpea genotypes in Western Kenya

July 2020

Cowpea production is common among smallholder subsistence farmers of Western Kenya due to its wide ecological adaptation. However, this crop is affected by cowpea rust Uromyces phaseoli var vignae (Baarel) Arth disease, causing economic yield losses with limited control measures. This study therefore, evaluated cowpea rust disease incidence (DI) and severity (DS) on growth of selected improved cowpea genotypes. A...

Author(s): Wabwayi Ndalira Odhiambo Judith Achieng and Basweti Evans Abenga  

Assessment of the effects of water stress on seed yield of common bean genotypes

July 2020

Drought stress is among the most important abiotic factors that contribute to the significant yield reduction of common bean (Phaseolus vulgaris L.). Due to unreliable and poor distribution of rainfall, drought tolerance has become the important train in common bean in bean growing areas. The objective of this study was to evaluate 16 common bean genotypes for drought tolerance under three moisture regimes and identify...

Author(s): Julius Peter Mbiu, Susan Nchimbi–Msolla, Magdalena N. William and Jean Claude Rubyogo

A cluster analysis of variables essential for climate change adaptation of smallholder dairy farmers of Nandi County, Kenya

July 2020

Smallholder dairy farmers occupy high potential areas of Kenya and are a source of manure, crops and milk. There is need to use other means of characterising smallholder dairy farmers as they mostly practice mixed farming. The objective of this paper is to use cluster analysis method to characterize the smallholder dairy farmers with added farmer and activity data variables. Clusters of 336 farmers in this study were...

Author(s): Jesse O. Owino, Daniel Olago, Shem O. Wandiga and Asaah Ndambi  

Effect of growth and yield modelling on forest regulation and earnings

July 2020

The elaboration of a forest schedule involves constructing and solving a forest regulation model. The regulated structure is not easy to obtain, considering the fluctuations in the effective planting area during the planning horizon, technological advances, and changes in annual demand. Nevertheless, the establishment and implementation of a regulation model often results in an improvement of the forest, in terms of the...

Author(s): Larissa Bitti Vescovi, Helio Garcia Leite, Carlos Pedro Boechat Soares, Márcio Leles Romarco de Oliveira, Daniel H. B. Binoti, Leonardo Pereira Fardin, Gabriela Cristina Costa Silva, Lucas Sérgio de Sousa Lopes, Rodrigo Vieira Leite, Ricardo Rodrigues de Oliveira Neto and Simone Silva  

Determinants of ecosystem-based adaptation to drought in the central cattle corridor of Uganda

July 2020

Ecosystem-based Adaptation (EbA) is widely recognised as an important strategy for strengthening climate change resilience. Nevertheless, there is limited evidence on the factors that facilitate or impede EbA for ecosystem services, adaptation benefits and livelihood improvement. In this study, the determinants of EbA to drought were assessed. A mixed quantitative and qualitative cross-sectional survey among 183 farmer...

Author(s): Nanfuka Susan, Mfitumukiza David and Egeru Anthony,  

Cracking and breaking response in four rice varieties as influenced by fertilization regime and storage duration

July 2020

In Northern Ghana, harvesting of the bulk of paddy, which is cultivated under rain-fed conditions, coincides with the harmattan season. This season is characterized by low relative humidity and dry weather conditions which hasten drying and increase the tendency of the paddy to crack during milling. The farmers also store paddy for longer periods in anticipation of higher price in the open market, thus the paddy may...

Author(s): Robert Kwasi Owusu, Issah Sugri, Wilson Dogbe, Desmond Sunday Adogoba and Joseph Kugbe

Nitrate contamination of groundwater: An issue for livelihood in Jaffna Peninsula, Sri Lanka

July 2020

Groundwater stored in large cavities and channels of Miocene limestone is the only source of portable water in Jaffna Peninsula, Sri Lanka. It is increasingly exploited and polluted by various contaminants that results in less availability of potable water. Nitrate contamination in drinking water is one of the major concerns which causes severe health impacts, such as methemoglobinemia especially in infants and...

Author(s): J. Prabagar, S. Prabagar and S. Thuraisingam  

Potential of reduced agricultural lime application rates to increase yield and profitability of maize through microdosing in central Malawi - A short note

June 2020

Maize (Zea mays L.) is a staple food crop in Malawi, with average yields of 1.8 -2.2 t ha-1 compared to potential yields of 5 to 10 t ha-1. In some areas, soil acidity is a serious constraint in crop production. The current recommendation is to apply 2.0 t ha-1 of lime as pre-plant broadcast and incorporated into soils with pHW < 5.5. A pilot study was conducted during 2015/2016 season at Bunda Campus (14° 35...

Author(s): Martin Lolani and Vernon H. Kabambe  

Role of leaf rolling on agronomic performances of durum wheat subjected to water stress

June 2020

In arid and semi-arid climates characterized by low rainfall with a great annual and inter-annual irregularity, drought can occur at any time inducing large losses in crop yield. Leaf rolling is one of the adaptive morphological responses to the water deficit observed in a number of species including cereals. It reduces the leaf area exposed to sunlight and transpiration. The aim of the present work was to characterize...

Author(s): Amal Ben-Amar, Anne-Aliénor Véry, Hervé Sentenac, Abdelaziz Bouizgaren, Said Mahboub, Nasser Elhaq Nsarellah and Keltoum El Bouhmadi  

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