-
An Overview of Wind Energy Potentials in Palestine
Huda Albisher,
Husain Alsamamra
Issue:
Volume 8, Issue 3, September 2019
Pages:
98-108
Received:
24 June 2019
Accepted:
24 July 2019
Published:
7 August 2019
Abstract: This study represents an overview on the possibility of using wind energy to fulfill the increasing demand on energy and the lack of supplied energy in the Palestinian territories, by analyzing and discussing former studies in this field. All previous studies mainly depended on historical data, and data from automated meteorological stations for some of the main cities in Palestine. However, the previous researches depended on data collected between 1991 – 2013, and used Weibull distribution function to analysing it. Moreover, all these studies agree about the possibility of exploiting wind energy, especially in high areas in Hebron in West Bank and Gaza city in Gaza Strip, to solve both the crisis of shortage electricity and the increase demand on energy. The highest wind energy is in Hebron, and the average month wind speed is between 3 m/s – 7.5 m/s, and the lowest wind energy is in Jericho, and the wind speed there is less than 2.5 m/s in most time. Some studies pointed that wind energy potential can be more efficient by using the hybrid PV / Wind system. At the same time, it can minimize the cost of generated energy from using each system independently. However, there are many obstacles of using wind energy to generate electricity in Palestine.
Abstract: This study represents an overview on the possibility of using wind energy to fulfill the increasing demand on energy and the lack of supplied energy in the Palestinian territories, by analyzing and discussing former studies in this field. All previous studies mainly depended on historical data, and data from automated meteorological stations for so...
Show More
-
The Impact of Nutrient and Heavy Metal Concentrations on Waste Dump Soils in Mangrove and Non-mangrove Forest in the Niger Delta, Nigeria
Issue:
Volume 8, Issue 3, September 2019
Pages:
109-115
Received:
18 July 2019
Accepted:
13 August 2019
Published:
23 August 2019
Abstract: This study is based on the comparison of nutrient and heavy metal concentrations in soils from waste dump sites in mangrove and non mangrove forest i.e. municipal areas. Nine soil samples were collected randomly at three sites in each location with soil auger, 5 cm below the top soil (n = 18). The soils were placed in polyethylene bags and sent to the laboratory for physicochemical analysis for nutrients: Calcium (Ca), Potassium (K), Magnesium (Mg), Manganese (Mn), Phosphorus (P) and Sulphate (SO4) and heavy metals: Zinc (Zn), Lead (Pb), Copper (Cu), and Cadmium (Cd) concentrations. The metals were measured by UV/visible spectrophotometric method using HACH DR 890 colorimeter (wavelength ~ 420 nm). The result indicates that there was no significant difference in heavy metal concentration between mangrove and non mangrove soils (F1, 88 = 0.24, P > 0.05). However, heavy metals were higher in non-mangrove than in mangrove soil. Zinc had the highest overall concentration (37.9±6.7 mg/l) followed by Pb (12.7±3.1 mg/l) and Cu (10.0±1.4 mg/l) in non-mangrove soil, whereas Cd was ten times higher in mangrove (0.4±0.2 mg/l) than in non-mangrove (0.04±0.03 mg/l) soil. The order of heavy metal concentration in mangrove soil is Zn>Pb>Cu>Cd and in non-mangrove soil is Zn>Cu>Pb>Cd. In contrast, there was a significant difference in nutrient concentration between mangrove and non-mangrove soils (F1, 88 = 4.39, P < 0.05). Similarly, nutrient elements (Ca, K, Mg, Mn and P) were higher in non-mangrove soil than mangrove soils while SO4 was higher in mangrove than in non-mangrove soil, The order of nutrient concentration in mangrove soil is Ca>Mg>K>SO4>Mn>P and in non-mangrove soil is Ca>Mg>K>Mn>SO4>P. There was a slight a positive correlation between the nutrient and heavy metal concentration (R2 = 0.016, n = 90, P = 0.001). Results show that municipal soil is more polluted with industrial waste than mangrove forest soil as a result of high anthropogenic activities. Thus harmful metals from mangrove and non mangrove soils can enter the food chain and drinking water source leading to adverse health effect.
Abstract: This study is based on the comparison of nutrient and heavy metal concentrations in soils from waste dump sites in mangrove and non mangrove forest i.e. municipal areas. Nine soil samples were collected randomly at three sites in each location with soil auger, 5 cm below the top soil (n = 18). The soils were placed in polyethylene bags and sent to ...
Show More
-
Assessment of Potassium Element on Lentil (Lens culinaris Medic) Agronomy and Nutrient Use Efficiency in Calcareous Soils
Md. Abdul Quddus,
Md. Ashraf Hossain,
Habib Mahammad Naser,
Babul Anwar,
Md. Abdus Sattar,
H. E. M. Khairul Mazed
Issue:
Volume 8, Issue 3, September 2019
Pages:
116-126
Received:
23 August 2019
Accepted:
5 October 2019
Published:
17 October 2019
Abstract: Potassium (K) is considered as key element for plant growth and physiology and improvement of productivity and quality of crops. The potassium (K) reduction from agricultural soils of Indo-Gangetic plain had been observed due to rapidly increasing intensive cropping systems, in combination with imbalanced fertilization. Now, burning issue is needed to better understand the role and dynamic of K in plants and K-use efficiency of crops. Hence, this study was undertaken during two consecutive years of 2015-16 and 2016-17 to know the effects of different levels of potassium on lentil productivity, nodulation, nutrient uptake and K use efficiency. The experiment was laid out in randomized complete block design considering five treatments with thrice replicates. The treatments were T1 (K Control), T2 (15 kg K ha-1), T3 (30 kg K ha-1), T4 (45 kg K ha-1) and T5 (60 kg K ha-1) along with the blanket dose of N18P20S10Zn2B1.5 kg ha-1 and cowdung 3 t ha-1. Yield and yield attributes of lentil responded significantly to K fertilizer. The highest mean seed yield (1684 kg ha-1) and maximum seed yield increase over control (31.9%) got from T5 treatment followed by T4 treatment. The highest total nutrient (N, P, K, S, Zn and B) uptake, maximum nodulation and the highest protein content (29.4%) in seed was, however, recorded from the plot receiving of 60 kg K ha-1. Apparent K recovery efficiency was recorded higher (17.8%) from T4 treatment. Apparent K recovery efficiency followed the order: T4>T5>T3>T2. From the economic point of view, T5 followed by T4 treatment is viable and sound. The results of the experiment suggest that 60 kg K ha-1 might be applied along with N18P20S10Zn2B1.5 kg ha-1 for lentil cultivation in calcareous soils of Bangladesh. The K rates for fertilizer recommendation in lentil need to be revised to take account for highest yield by higher increasing rate of K in soil.
Abstract: Potassium (K) is considered as key element for plant growth and physiology and improvement of productivity and quality of crops. The potassium (K) reduction from agricultural soils of Indo-Gangetic plain had been observed due to rapidly increasing intensive cropping systems, in combination with imbalanced fertilization. Now, burning issue is needed...
Show More
