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Performance study of varieties and plant geometry on productivity of cowpea (Vigna unguiculata (L.) Walp) at Bharatpur, Chitwan, Nepal

100%
Chaulagain A., Adhikari B. B., Poudel A.
World News of Natural Sciences
|
2023
|
vol. 46
79-86
EN
The study about performance of different varieties and plant geometry on productivity of cowpea (Vigna unguiculata L.) was carried at Bharatpur, Chitwan from duration of February to May. The effect of two variety (Prakash and Surya) and four spacing (60 cm × 10 cm, 60 cm × 15 cm, 60 cm × 20 cm and 60 cm × 25 cm) were studied using two factor Randomized Complete Block Design (RCBD) having eight treatment replicated three times consisting of 24 plots. The main objective of the research is to find out the best variety and appropriate spacing for getting higher yield of cowpea. Results revealed that variety Surya showed the highest grain yield (1.25 t/ha) followed by Prakash (1.06 t/ha). Whereas, in case of spacing, the highest grain yield was obtained in 60 cm × 15 cm (1.33 t/ha).Similarly in combine treatment; the highest grain yield (1.47 t/ha) was obtained in combination of Surya and 60 cm × 15 cm. From experiment it is concluded, the combination of Surya and 60 cm × 15 cm gives highest productivity compared to all other treatments at terai region of Nepal.
2
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Statistical relationship between leaf litter and tree growth characteristics of Tectona grandis species

86%
Eguakun F. S., Job M.
World News of Natural Sciences
|
2018
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vol. 18
|
issue 2
252-261
EN
Forest productivity relies on the quantity and quality of litter as this influences nutrient cycling in the ecosystem. Many studies have been carried out on litter fall, but few attempts has been made to relate litter fall nutrient content with tree growth variables The aim of this work was to investigate basic relationships between the leaf litter nutrient content of Tectona grandis and tree growth characteristics. The study was done at the arboretum of the Department of Forestry and Wildlife Management, University of Port Harcourt, Rivers State, Nigeria. Data were collected from four (4) randomly selected 20m × 20m (0.04ha) plots. Within each plots, four (4) litter traps at 8m apart was set at random to collect litter on a weekly basis, while tree growth variables were measured on trees around the trap. The collected litter was put into zip-lock bags and taken to the laboratory for nutrient content analysis. Nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), sodium (Na), magnesium (Mg) content and pH were included in this. The result shows that the average weekly leaf litter collected from the trap was 11.8g. In terms of average nutrient content, Nitrogen had the highest average at 1.8, while Sodium (Na) had the lowest value at 0.14. Among the tree growth variables, only height had a positive correlation with litter collected. The results also show that Nitrogen micronutrient content was related to the amount of litter collected (0.536). In addition, all the exchangeable base analysed in the study were also related to the amount of litter collected. Conclusively, the amount of litter produced is a major indicator of primary productivity because as litter quantity increases, available nutrient content for plant growth also increases, hence, having influence on tree height.
3
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Seasonal Monitoring of the Economic Sustainability of Fanalou Quarry, Ikpeshi, Edo State, Nigeria

72%
Amosu C. O., Omotehinse A. O.
World News of Natural Sciences
|
2022
|
vol. 41
13-32
EN
The current study is focused on checking the survival, sustainability and continuity of mining operations on Fanalou Nigeria Company limited by identification of the level of metallic composition and conducting due economic analysis on the production and sales of the dolomite in the quarry. This study identified the concentration of some selected heavy cationic metals such as Magnesium (Mg), Manganese (Mn), Lead (Pb), iron (Fe), Nickel (Ni) and anionic non-metals such as Sulphate (SO42-), Chloride (Cl-) and Nitrate (NO3¯) as found out in the water and soil samples at five different mine pit locations of case study, using Atomic Adsorption Spectrophotometer (AAS). The results revealed that the mean concentration in the mine pit’s water are: Mg (32.10 mg/L), Mn (0.952 ppm), Pb (0.227 ppm), Fe (1.036 ppm), Ni (0.630 ppm) , SO42- (1280.00 mg/L), Cl¯ (29.27 mg/L); and in the pit’s soil: Mg (250.500 ppm), Mn (4.120 ppm), Pb (1.062 ppm), Fe (2.510 ppm), Ni (2.136 ppm) , SO42- (224.00 ppm). Mg was observed to be more in concentration as compared to Mn followed by Fe, followed by Ni, followed by Pb and SO42-. This amount of metallic concentration has a latent threat to production, especially in pumps applied for mine pit drainage of water. Economic Analysis was also carried out to determine the production trends and profits during the rainy and dry season for the quarry. In the year 2020, it was 36,337,500 naira (in the rainy season) and 68,400,000 naira (in the dry season); in the year 2021, it was 36,112,500 naira (during the rainy season) 68,850,000 naira (at the dry season). The grand annual profits stand as 104,737,500 naira for the year 2020 and 104,962,500 naira for the year 2021. This has been sustainable for continuity of field operations.
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