Open Access Original Research Article

Isolation and Identification of Keratinophilic Fungi from Cattle House Soil in Khartoum City, Sudan

Wisal, G. Abdalla, Huda Osman

Asian Soil Research Journal, Page 1-6
DOI: 10.9734/asrj/2018/v1i426354

The present study was done to investigate the presence of keratinophilic fungi in soil, sixty soil samples were collected randomly from bovine farms in Khartoum state. Hair baiting technique was used for isolating the fungi. Plates which contain soil and children hair were then incubated at 28ºC for one month. Ten genera and fifteen species were isolated from cattle house soils. Aspergillus species represent the highest occurrence of isolates.

Open Access Original Research Article

Effects of Phosphorus Sources and Application Rates on Nitrogen and Phosphorus Concentrations and Phosphorus Use Efficiency in Rice Plant

Prosper I. Massawe, Jerome Mrema

Asian Soil Research Journal, Page 1-8
DOI: 10.9734/asrj/2018/v1i426355

A study was conducted to determine the effects of nitrogen (N) and phosphorus (P) concentrations and P use efficiency from Minjingu phosphate rock (MPR), Minjingu mazao and Triple Super Phosphate (TSP) fertilizers under irrigated rice (Oryza sativa L.) production in Lekitatu village, Meru district, Arusha region, Tanzania. The initial soil pH in the two experimental sites was slightly alkaline while total N and available P was low and medium respectively. Randomized Complete Block Design (RCBD) with three replications was adopted and phosphorus was applied at the rates of 0, 20, 40 and 60 kg P ha-1 as MPR, Minjingu mazao and TSP. Nitrogen was applied uniformly at a rate of 60 kg N ha-1 as urea taking into account the 10% N contained in the Minjingu mazao fertilizer. Phosphorus application increased N and P contents in the rice plants and phosphorus use efficiency (PUE) with the increase of P levels from 0 to 60 kg P ha-1 for all P sources. The site 1 had more PUE than site 2 due to higher moisture content. These effects were due to increased availability and nutrients uptake by plants, particularly P. Based on the results, it is recommended that; Minjingu mazao at the rates of 40 to 60 kg P ha-1, MPR and TSP at a rate of 60 kg P ha-1, respectively have to be adopted for sustainable soil P use in rice production areas of Lekitatu village.

Open Access Original Research Article

Influence of Nitrogen Sources and Bio-fertilizer on Soil Nutrients, Yield and Quality of Cowpea under Saline Soil Conditions

Marwa, A. Ahmed, Fatma H. A. El-Agyzy, Khaled, A. Shaban

Asian Soil Research Journal, Page 1-14
DOI: 10.9734/asrj/2018/v1i429860

Two field experiments were conducted at El-Rod village at Sahl El-Houssinia, El-Sharkia governorate, (32°15' 00" N 30°50' 00" E), Egypt. The study investigated evaluations of different nitrogen fertilizers sources (calcium nitrate, ammonium sulphate and urea fertilizers) and rates (0, 47.6, 71.4 and 107 kg N/ha) alone or combined with bio-fertilizer (using bio-fertilization with Rhiobium radiobacter sp strain on improve nutrients available and contents in cowpea productivity and quality in newly reclaimed saline soil conditions during two summer seasons 2017 and 2018.  The studies treatments were disturbed among the experimental pelts in split design with six replicates. The obtained results cleared that the used ammonium sulphate fertilizer was increase effect with increasing rate in EC, pH, and available N, P, K , Fe, Mn and Zn content in soil. Moreover data recorded the applied 71.4 kg N /ha was increase of plant height, weight of 100 seeds, weight of pods (g/plant) , weight of seeds (g)/plant and seeds yield (ton ha-1) have been affected by inoculation with bio-fertilizer combined with nitrogen sources fertilizers  and different rates than other treatments. The highest values of N, P , K, Fe, Mn and Zn concentrations and uptake in seeds treated with ammonium sulphate at rate 71.4 kg N/ha than other treatments. The decrease of the soil salinity to increased content of cowpea plant of chlorophyll and protein, but increased salinity of the soil led to increase the content of the plant of proline. The application of ammonium sulphat at 30 kg N/fed combined with bio-fertilizer was improve soil properties and cowpea productivity and quality under saline soils conditions.

Open Access Original Research Article

Assessment of the Impact of Untreated Rubber Effluent on the Base Cationic and Mycological Properties of Rubber Plantation Soil in Calabar, Nigeria

Sylvester P. Antai, Ayotunde O. Ajinde

Asian Soil Research Journal, Page 1-10
DOI: 10.9734/asrj/2018/v1i429856

The study was carried out to determine the impact of rubber effluent on the cationic and mycological properties of soil in a rubber plantation through which it flows. Rubber effluent samples were collected for physicochemical and mycological analysis from the effluent discharge point of a rubber factory in Calabar, Nigeria. Three impact points (25 metres apart) were created along the flow channel of the effluent, and three sample points spaced 5m apart were created on both sides of each impact point. Top and subsoil samples were collected from the impact points and sample points for base cationic and mycological analysis. A control soil sample was also collected similarly. Correlation analysis, single-sample and two-sample were used to analyse the results. Results revealed that only temperature (26°C), sulphate (20.15 mg/l) and chloride (43.87 mg/l) conformed to Federal Environmental Protection Agency (FEPA) permissible limits of 40°C, 500 mg/l and 600mg/l, respectively. Bacteria isolated from the rubber effluent were identified as Pseudomonas spp, Micrococcus spp, Staphylococus spp, Proteus spp, Klebsiella spp, Bacillus spp, Escherichia coli, Enterobacter spp and Aeromonas spp. Fungi isolated were identified as Aspergillus spp, Penicillium spp, Rhizopus spp, Mucor spp and Sporothrix spp. Results also revealed that the rubber effluent impacted the soil, but parameters still recorded low values, as the effects of the effluent on the soil were altered by leaching, erosion and rubber root uptake. The study also revealed that microbiological investigation involving the use of a selective substrate can be used to augment or properly interpret results obtained from base cation studies similar to the current study, especially in a situation where pollution is not obvious or where factors like root uptake, leaching and erosion can potentially affect statistical results of base cation analysis.

Open Access Original Research Article

Soil Fertility as Influenced by K Enriched Azolla

S. Muruganayaki, A. Jayachitra, S. Jothimani

Asian Soil Research Journal, Page 1-8
DOI: 10.9734/asrj/2018/v1i430040

Biological Nitrogen Fixation (BNF) is a major source of fixed N for plant life and to sustain production and productivity of agricultural crops. An incubation experiment was conducted by growing Azollae filiculoides with 2 agriculturally important potassic fertilizers (Potassium Chloride, Potassium shulphate) as main plot in seven concentrations (0, 5, 10, 20, 30, 40 and 50 ppm of K) as sub-plots laid down in split plot design replicated  three times. The collected Azolla was incorporated with soil  at 10 t/ha and maintained at two moisture condition such as 60 and 100 percent and assessed soil fertility by estimating various available plant nutrients and organic carbon status..The mean organic carbon content of the soil was 0.657 and 0.525% at 60 and 100% moisture contents respectively. The available N content ranged from 216.2 to 327.3 and 191.1 to 285.3 kg/ha from 0 to 40 ppm of K concentration at 60 and 100% moisture respectively because the Azolla had a high N content which released into the soil after decomposition. Azolla also contributed to the supply of phosphorus, potassium, sulfur, zinc, iron and molybdenum in sufficient amounts in addition to other micronutrients besides addition of nitrogen. Among the various concentration, 40 and 50 ppm K were significantly maintained higher and equal soil available P status of 75.17 and 77.33 kg / ha respectively. The fertilizer, K2SO4 with 30, 40 and 50 ppm at 60% moisture content and 40 and 50 ppm of K2SO4 and 40 ppm of KCl produced statistically higher and equal available K at 100% moisture. The soil biological health, mineralization and consequent increase in nutrient status by the application of K enriched Azolla was more under 60% soil moisture content than fully saturated soil.