Research Papers/Topics in Agronomy

Agronomical and Quality Performance of Rhodes Grass (Chloirs gayanaKunth) Cultivars Under Different Nitrogen Levels and Production Systems in the Sudan

Research experiment and field survey were conducted during 2016 – 2018 to study the effect of variety and nitrogen fertilization on the agronomic andquality performance of Rhodes grass and to investigate the husbandry  practices of Rhodes grass in the major production systems in the Sudan. The experiment was conducted in Shambat (2016-2017) in the demonstration farm of the College of Agricultural Studies, Sudan University of Science and Technology. Two Rhodess grass varieties (Fine Cu...

Diallel Analysis And Characterisation Of Verticillium Wilt Tolerance In Cotton (Gossypium Hirsutum L.)

Abstract Cotton production is generally declining due to several limitations which include climate variations, poor crop management and biotic stress factors. Of the biotic stress, diseases are a major limiting factor of cotton production. Verticillium wilt is one of the most important disease and is an economically important fungal disease causing significant losses to seed cotton yield in Zimbabwe. Varietal development for resistance in cotton requires the understanding of the underlying ge...

Effects Of Tillage Method And Sowing Time On Growth, Water Use And Yield Of Chickpea (Cicer Arietinum L.) In Kenyan Dry Highlands

ABSTRACT The need to provide sufficient protein food for an increasing population that is mainly resource poor requires opening up of marginal land for growing appropriate pulses such as chickpea. An experiment was carried out at KARI-Naivasha situated at an altitude of 1900 m, characterized with clayey to sandy loam soils in a split plot of randomized complete block design over two seasons (December 29, 2004 to May 26, 2005 and June 21 to November 15, 2007). The objective was to investigate ...

Effect of Time of Paclobutrazol Application on Growth, Quality and Yield of Potato (solanum tuberosum l.) In The Lowveld of Zimbabwe

ABSTRACT Irish potato is a cool-season crop that require low temperatures for high yields. In potato production tuberisation is an important and complex process. High temperatures reduce successful cultivation of potato in the lowveld of Zimbabwe because they tend to promote vegetative growth at the expense of tuber production. High temperatures may increase in gibberellin activity that inhibits tuberisation.To overcome this problem paclobutrazol can be used to overcome the inhibitory effect...

Effect Of Time And Method Of Paclobutrazol Application On Growth, Quality And Yield Of Potato (Solanum Tuberosum L.)

ABSTRACT Potato is one of the most widely grown tuber crop that contribute significantly to human nutrition and food security. Potato is a cool season crop and high temperatures are inhibitory to tuberization resulting in low yields. This is mainly due to production of high levels of gibberellins at high temperatures that promote vegetative growth at the expense of tuberization. The balance of hormones that control tuberization can be managed by using anti-gibberellin synthesis such as paclob...

Effects of Pearl Millet (Pennisetum Glaucum L.)–Cowpea (Vigna Unguiculata L.) Intercrop On Striga Hermonthica (Del.) Benth, Yield Components and Grain Yield in the Sudan Savannah Zone of Ghan

ABSTRACT Field experiment was conducted on naturally Striga hermonthica infested field in the Kassena-Nankana East District of the Upper East Region during the 2018 cropping season. This was to investigate effects of Striga tolerant pearl millet varieties intercropped with cowpea on S. hermonthica, crop yield and yield components. The study was a 4 x 3 factorial experiment consisting of four pearl millet varieties (Akad kom, Kaanati, Naad kohblug and Waapp naara) and three cropping patterns (...

Screening And Evaluation Of Some Genotypes Of Maize (Zea Mays L.) And Their F1 Hybrids For Tolerance To Drought And Striga Hermonthica (Del.) Benth

ABSTRACT  Drought stress and striga parasitism are major constraints to maize (Zea mays L.) production in Northern Ghana. Two experiments were conducted to screen some genotypes of maize for tolerance to drought and Striga hermonthica at Nyankpala in the Guinea Savanna agro ecological zone of Ghana. In Experiment 1, seeds were planted in pots of 0.01 m3 volume arranged in rows on a platform in a screen house at Nyankpala. Genotypes were replicated three times in a completely randomized desig...

Susceptibility Of Cowpea (Vigna Unguiculata (L.) Walpers.) Varieties To The Pulse Beetle (Callosobruchus Maculatus Fab.)

ABSTRACT The pulse beetle, Callosobruchus maculatus (F.) is a key pest to stored cowpea. There is limited information on host plant resistance management of this pest on cowpea in Northern Ghana. A laboratory experiment was conducted to test for varietal resistance of some improved varieties against this pest in cowpea. The experiment was laid out in a Completely Randomized Design (CRD). Seven varieties of cowpea namely; Padi-tuya, Songotra, Apagbaala, Zaayura, Bawutawuta, Marfo-tuya and a lo...

Evaluation Of Botanicals For The Control Of Anthracnose (Colletotrichum Gloeosporioides Penz) Of Yam (Dioscorea Rotundata Poir)

ABSTRACT Anthracnose is the most serious leaf and vine epiphytotic disease of yam that causes yield loss. Severe infection results in vine dieback, defoliation, and tuber rot. Aqueous extracts of Azadirachta indica A Jus seed (Neem tree seed), Jatropha curcas ( L) seed (Jatropha plant seed) and Nicotiana tabacum (L) leaf (Tobacco plant leaf) extracts were evaluated for the control of anthracnose disease of yam (Dioscorea rotundata Poir). The pathogen was isolated, identified and its growth w...

Effects Of Some Field Practices On The Yield And Quality Of Cassava (Manihot esculenta Crantz) Planting Material

ABSTRACT The use of cassava stems as planting materials is limited by scarcity, poor quality, high cost and inappropriate field techniques (land preparation, planting spacing, and field maintenance). To enhance the supply of stem for planting cassava varieties, the existing production practices were evaluated and techniques for increasing the number and quality of cassava planting materials were investigated. Seventy-four cassava farms, purposively selected in 11 major cassava growing S...

GENETIC VARIABILITY FOR STEM BORER RESISTANCE IN TWO ADAPTED EARLY-MATURING MAIZE (Zea mays L.) POPULATIONS

Stem borers are among the major biotic stresses limiting the grain yield of maize, an important cereal crop in Africa. Breeding for multiple resistance to maize stem borers has been reported to be a promising method of control. Understanding the genetic variability of crop populations will help in improving them for pest resistance. Thus, genetic variability for dual resistance to two stem borer species were determined in a white (DMR ESR-W) and a yellow (DMR ESR-Y) maize populations to ...

Characterization And Evaluation Of Selected Soils Of Southern Nigeria For Rubber (Hevea Brasiliensis, Muell. Arg.) Cultivation

ABSTRACT Successful land management for tree crop production requires good knowledge of the soil variation and suitability for specific tree crops. Most of the traditional rubber growing areas in Nigeria have not been evaluated for their suitability and production potential. Characterisation and evaluation of the land for rubber production was therefore conducted. Soils of two rubber producing areas: Iyanomo, Edo State and Akwete, Abia State were characterised and evaluated using local, Unite...

Genetic Variability For Stem Borer Resistance In Two Adapted Early-Maturing Maize (Zea Mays L.) Populations

ABSTRACT Stem borers are among the major biotic stresses limiting the grain yield of maize, an important cereal crop in Africa. Breeding for multiple resistance to maize stem borers has been reported to be a promising method of control. Understanding the genetic variability of crop populations will help in improving them for pest resistance. Thus, genetic variability for dual resistance to two stem borer species were determined in a white (DMR ESR-W) and a yellow (DMR ESR-Y) maize populations...

Evaluation Of Mehlich - 3 As A Multipurpose Extractant Of Phosphorus And Potassium Using Bell Pepper (Capsicum Annuum L.) In Some Nigerian Soils

ABSTRACT Use of single soil specific extractants to determine plant available phosphorus and exchangeable potassium for crops such as bell pepper, are costly, laborious and time wasting. Bell pepper, rich in antioxidants, requires phosphorus and potassium for high quality fruit yield. Mehlich-3 (M3), a multi-purpose extractant could extract phosphorus and potassium simultaneously. However, M3 has not been evaluated and adapted for Nigerian soils. Therefore, M3 as a multi-purpose extractant of...

Effects Of Postharvest Handling Methods And Storage Conditions On Storability Of Pepper (Capsicum Frutescens L.) Fruits In Southwest Nigeria

ABSTRACT Pepper a perishable seasonal fruit, requires storage to extend its shelf-life. Appropriate postharvest handling and storage prolong longevity and preserve quality of Pepper Fruit (PF). However, there is dearth of information on its handling and storage in Southwest Nigeria. Therefore, the effects of postharvest handling methods and storage conditions on storability of PF were investigated. Two hundred Pepper Fruit Marketers (PFM) were randomly selected from pepper markets in Ibadan, ...


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