August 2010
Effect of sowing date and planting density on seed production of carrot (Daucus carota var. sativa) in Ethiopia
An experiment was conducted in 2006 and 2007 cropping seasons to investigate the effect of sowing date and planting density on yield and quality of carrot seed. The crop was grown in factorial combination of four sowing dates (mid November, December, January and February) and four different planting densities (133 333, 200 000, 266 666, and 400 000 plants/ha) in randomized block design with three...
August 2010
Factors influencing soil CO2 efflux in Northeastern Indian oak forest and plantation
Temporal changes in soil CO2 efflux rates were measured in a subtropical natural mixed oak forest and managed oak plantation in the Northeastern Himalayan region. Soil CO2 efflux rates in two ecosystems were correlated with key soil biotic (e.g. fungal, bacterial and actinomycetes populations) and abiotic (e.g. soil moisture, temperature, pH and organic carbon concentration) variables. Rate of...
August 2010
Effect of cutting positions and growth regulators on rooting ability of Gonystylus bancanus
The effect of cutting positions and growth regulators on rooting ability ofGonystylus bancanus were studied. This study, aims to determine the effects of cutting positions (top, middle, and bottom) and hormonal treatments (control, Seradix 3, Planton 3000, IBA 100 mg and IBA 150 mg) on the rooting ability of G. bancanus. The top position recorded the highest survival percentage of 90.7%...
August 2010
Some observations on the culture of attached groundnut (Arachis hypogaea L.) gynophores in simplified nutrient solutions
Attached groundnut gynophores of Virginia line Virginia bunch strain 1 (VB-1), Spanish line TMV-3 and Valencia line CBBR4 were cultured singly in aerated, simplified nutrient solutions consisting of (2 μM iron (Fe) and 0.5 μM zinc (Zn) with or without 100 μM calcium (Ca). In all lines, normal and apparently healthy pods were produced in solutions containing Ca, whereas, pod growth was severely...
August 2010
Antimicrobial activity evaluation of the oleoresin oil of Pistacia vera L.
The hydrodistilled essential oils from the exudates of Pistacia vera L. stems have been tested against three bacteria, Escherichia coli, Staphylococcus aureus andProteus using three methods: agar disc diffusion method, determination of MIC (minimal inhibitory concentrations) and in the liquid phase, by Maruzella method.The results obtained showed that E....
August 2010
The effects of some cryptogamic extracts on the primary productivity of Vigna unguiculata L. Walp
The effects of hot and cold aqueous extracts of Barbula lambarenensis, Dryopteris flix-max; Nephrolepis davalloides, Phymatodes scolopenta, Platyceriumangolense and Azadrachta indica and Karate 2.5EC (chemical) on the primary productivity of cowpea were investigated. The extracts of the plant materials and the chemical were appropriately used to irrigate the cowpea twice a week...
August 2010
Evaluation of intra and interspecific rice varieties adapted to valley bottom conditions in Burkina Faso
Rice is one of the major staple foods in Burkina Faso and in-country production covers about 60% of the demand and 40% is met from imports. The immense potential of the lowlands in Burkina Faso for durable intensification of rice cropping have not been realised due to biotic and abiotic constraints. Hence, there is an urgent need to increase and improve the production of rice in order to meet up with the...
August 2010
An efficient protocol for in vitro clonal propagation of natural sweetener plant (Stevia rebaudiana Bertoni)
Leaf segments of Stevia were cultured on MS medium supplemented with varying concentrations (0.5, 1.0, 1.5, 2.0, 2.5 mg/L-1) of growth regulators (BAP and 2, 4-D). Ninety one percent aseptic cultures were obtained when sterilized with 0.1% HgCl2 for 10 min. The highest amount of callus was obtained in MS medium supplemented with1.0 mg/L-1 BAP+0.5 mg/L-1 2, 4-D, respectively. On the...
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