scholarly journals Future study of energy use efficiency in irrigated wheat production in eastern Urmia lake

2019 ◽  
Vol 17 (2) ◽  
pp. 81-102
Author(s):  
ابوالفضل ناصری ◽  
رامین نیکان فر
Keyword(s):  
Future Study ◽  
Energy Use ◽  
Urmia Lake ◽  
Energy Use Efficiency ◽  
Wheat Production ◽  
Use Efficiency ◽  
Irrigated Wheat

scholarly journals Investigation of Input and Output Energy for Wheat Production: A Comprehensive Study for Tehsil Mailsi (Pakistan)

2020 ◽  
Vol 12 (17) ◽  
pp. 6884
Author(s):  
Muhammad N. Ashraf ◽  
Muhammad H. Mahmood ◽  
Muhammad Sultan ◽  
Narges Banaeian ◽  
Muhammad Usman ◽  
...  
Keyword(s):  
Grain Yield ◽  
Co2 Emissions ◽  
Energy Use ◽  
Output Energy ◽  
Energy Productivity ◽  
Energy Use Efficiency ◽  
Wheat Production ◽  
Input And Output ◽  
Energy Indices ◽  
Use Efficiency

The global increasing food demand can be met by efficient energy utilization in mechanized agricultural productions. In this study, input–output energy flow along with CO2 emissions for different wheat production cases (C-I to C-V) were investigated to identify the one that is most energy-efficient and environment-friendly case. Data and information about input and output sources were collected from farmers through questionnaires and face-to-face interviews. Input and output sources were converted into energy units by energy equivalents while CO2 emissions were calculated by emission equivalents. Data envelopment analysis (DEA) was conducted to compare technical efficiencies of the developed cases for optimization of inputs in inefficient cases. Results revealed that case C-Ⅴ (higher inputs, larger fields, the tendency of higher fertilizer application and tillage operations) has the highest energy inputs and outputs than the rest of the cases. Moreover, it possesses the lowest energy use efficiency and energy productivity. The highest CO2 emissions (1548 kg-CO2/ha) referred to C-Ⅴ while lowest emissions per ton of grain yield were determined in C-Ⅳ (higher electricity water pumping, moderate energy input). The grain yield increases directly with input energy in most of the cases, but it does not guarantee the highest values for energy indices. C-Ⅲ (moderate irrigations, educated farmers, various fertilizer applications) was found as an optimum case because of higher energy indices like energy use efficiency of 4.4 and energy productivity of 153.94 kg/GJ. Optimum input and better management practices may enhance energy proficiency and limit the traditionally uncontrolled CO2 emissions from wheat production. Therefore, the agricultural practices performed in C-Ⅲ are recommended for efficient cultivation of wheat in the studied area.

scholarly journals Energy Use Efficiency in Irrigated and Rainfed Wheat in Pakistan

2020 ◽  
Author(s):  
Muhammad Imran ◽  
Orhan Özçatalbaş
Keyword(s):  
Environmental Sustainability ◽  
Energy Use ◽  
Production Systems ◽  
Input Energy ◽  
Output Analysis ◽  
Energy Use Efficiency ◽  
Use Efficiency ◽  
Rainfed Wheat ◽  
Using Data ◽  
Irrigated Wheat

Wheat is an important staple food in Pakistan and is grown in both irrigated and rainfed production systems. To meet increased demand, farmers have increased the use of input energy in wheat production. The intensive use of energy has many consequences for energy security and environmental sustainability. In this chapter, we have analyzed the energy use efficiency of wheat crop grown in two different production systems using data collected from wheat farmers of Punjab province of Pakistan through face-to-face interviews. Energy input–output analysis revealed that 49,079 MJ/ha input energy is used in irrigated wheat and 31,421 MJ/ha in rainfed wheat. The main difference between both production systems is because of irrigation water. Fertilizer has the highest share in total energy consumption followed by diesel fuel. Energy consumed per kilogram of wheat produced is less in rainfed wheat compared to irrigated. Similarly, energy efficiency values of rainfed wheat are better than irrigated wheat. Results of data envelopment analysis reveal that 38% of wheat farmers in rainfed systems and 62% in the irrigated system are using energy efficiently. The substantial difference between the energy use of inefficient and efficient indicates that there’s a significant potential to improve energy use efficiency in both systems.

Impact of urban block typology on building solar potential and energy use efficiency in tropical high-density city

2019 ◽  
Vol 240 ◽  
pp. 513-533 ◽  
Author(s):  
Ji Zhang ◽  
Le Xu ◽  
Veronika Shabunko ◽  
Stephen En Rong Tay ◽  
Huixuan Sun ◽  
...  
Keyword(s):  
Energy Use ◽  
High Density ◽  
Energy Use Efficiency ◽  
Use Efficiency
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