Abstract: The productivity food barley is constrained by the competition of weed and agronomic practices. An experiment was conducted to evaluate the effect of weeding frequency on Relative Weed Density, Weed intensity, Relative yield loss and Yield of Food barley varieties at Amuru District of Horo Guduru Wollega Zone of Oromia National Regional State in 2016 main cropping season. The experiment was laid down in a Randomized Complete Block Design (RCBD) with three replications. The treatments were factorial combination of four weeding frequencies (weedy check, one time weeding, two times weeding and three times weeding) and five food barley varieties (HB 1307, CROSS 41/98, GOBE, EH1493 and Local). The major weed species identified in the study area were Setaria pumila with relative density (31.74%), population density (84 plants m-2) and an intensity of 2.1; Snowdenia polystachya with relative density (16.6%), population density ( 44) with an intensity of 1.1; and Polygonum spp with relative density (10.57%), population density (28) and an intensity of 0.95. While others weed species constituted about 27.17% of a total weed population with a density of 72 plants m-2. Weeding frequency and varieties significantly affected biological and grain yields, and relative yield loss of food barley. Three times weeded treatment gave significantly higher grain (1422 kgha 1) and biological (3877.78 kgha 1) yields. Moreover, HB 1307 variety gave significantly higher grain (1292 kgha 1) and biological (3513.9 kgha 1) yields. Therefore, three times weeding with HB 1307 variety is recommended to increase the production and productivity of food barley in the study area.Abstract: The productivity food barley is constrained by the competition of weed and agronomic practices. An experiment was conducted to evaluate the effect of weeding frequency on Relative Weed Density, Weed intensity, Relative yield loss and Yield of Food barley varieties at Amuru District of Horo Guduru Wollega Zone of Oromia National Regional State in 20...Show More
Abstract: The studies were carried out on the following types of soils, most widespread within Azerbaijan: gray-brown, gray-earth-meadow, gray-brown and mountain-gray-brown. Common to these soils is the deep penetration of humus into the soil profile and its very slow decrease down by profile. According to the results of our research, it is proved that in the soil the humus content in the 25-50 cm layer is from 2.00 to 2.12%, and the total nitrogen is from 0.112 to 176%, the content of mineral forms of nitrogen is almost identical with the previous soils, while some an increase in the content of phosphorus and exchangeable potassium relative to other studied soils. The amount of carbonates in these soils is low (CaCO3 -6.4-10.4%). The absorbed bases are dominated by calcium, which is 60.3-76.7% of the total exchangeable cations. The amount of exchangeable sodium in the absorbed complex is low, 2.7-4.7% of the total, while the content of exchangeable magnesium is quite high. The moisture regime of mountain-gray-brown soils is determined mainly by the amount of atmospheric precipitation and the course of evaporation of soil moisture.Abstract: The studies were carried out on the following types of soils, most widespread within Azerbaijan: gray-brown, gray-earth-meadow, gray-brown and mountain-gray-brown. Common to these soils is the deep penetration of humus into the soil profile and its very slow decrease down by profile. According to the results of our research, it is proved that in th...Show More
Abstract: Morphological and pollen parameter evaluation of M2 generation of fast neutron irradiated capsicum annuum was carried out to assess the heritability of the useful traits observed in the M1 generation. Irradiated M1 generation seeds at the Centre for Energy and Research Training (CERT), Ahmadu Bello University, Zaria using Fast Neutron Irradiation (FNI) from Americium-Beryllium source with flux 1.5x104n.cm-2s-1 at 0, 30, 60, 90 and 120 minutes exposure periods were collected from the Department of Biological Sciences, Federal University of Technology Minna. The seeds were raise in the experimental garden of the Department in Randomised Complete Block Design (RCBD) and assess for morphological and pollen parameter. The results of the plant height indicated significant difference (P<0.05) across the treated plants at 2, 4, 6 and 8 weeks. The minimum height and number of leaf per plant at week 2 (3.53 cm and 6.25) and 4 weeks (11.80 cm and 13.85) was due to plant exposed to 30 minutes irradiated mutant. Maximum number of fruit and weight of fruit per plant was due to 60 minutes IEP with the value of 3.13 and 22.22 g respectively, while the minimum weight was due to 30 minutes exposure periods (13.89 g). Plants with 90 minutes exposure period recorded the highest percentage of pollen viability (96.78) and number of pollen production (79600.00).Abstract: Morphological and pollen parameter evaluation of M2 generation of fast neutron irradiated capsicum annuum was carried out to assess the heritability of the useful traits observed in the M1 generation. Irradiated M1 generation seeds at the Centre for Energy and Research Training (CERT), Ahmadu Bello University, Zaria using Fast Neutron Irradiation (...Show More
