scholarly journals Studies of microclimatic conditions in summer moong as influenced by different mulches

MAUSAM ◽  
2022 ◽  
Vol 46 (4) ◽  
pp. 423-426
Author(s):  
VINOD KUMAR ◽  
O. P. BISHNOI ◽  
SURENDER SINGH ◽  
V. U. M. RAO
Keyword(s):  
Field Experiment ◽  
Latent Heat ◽  
Energy Use ◽  
Summer Season ◽  
Heat Energy ◽  
Net Energy ◽  
Sensible Heat ◽  
Microclimatic Conditions ◽  
Main Components ◽  
Agricultural Meteorology

A field experiment was conducted during summer season of 1990 at research farm of Department of Agricultural Meteorology, Haryana Agricultural University, Hisar to study the microclimatic conditions in moong with the use of mulches. Latent heat enelgY and sensible heat energy were the main components of net energy. Among the various treatments, the latent heat energy use was found higher in black polythene sheet mulch. Soil temperature values were low in straw and white polythene mulch than black polythene mulch treatment    

scholarly journals Mean Daily Variability of Energy Fluxes Above Alexandria Eastern Harbor

2021 ◽  
Vol 8 (3) ◽  
pp. 183-198
Author(s):  
Maged M.A. Hussein
Keyword(s):  
Heat Flux ◽  
Latent Heat ◽  
Latent Heat Flux ◽  
Energy Budget ◽  
Sea Surface ◽  
Positive Energy ◽  
Net Energy ◽  
Sensible Heat ◽  
Long Wave ◽  
Daily Variability

Mean daily variability of latent heat (E), sensible heat (H), net long wave (Lwnet), net short wave, and net flux of surface heat balance were estimated from hourly sea surface water temperature (SST) and meteorological time series obtained for three months during summer season (2019) in Alexandria Eastern Harbor (AEH), Egypt. Latent and sensible heat were not in phase and had their maximum 181.12 W/m2 (5:00 PM), 16.5 W/m2 (5:00 AM) and minimum 103.64 W/m2 (8:00 AM), -12.14 W/m2 (3:00 PM), resulting in Bowen ration of -0.11 and 0.09, respectively. The loss of heat by evaporation therefore predominates than sensible heat utilized to warm surface atmosphere. The instability of the atmosphere was existing nearly most of the time period, rising exchange coefficients of sensible and latent heat flux by about 24.26% over estimated neutral values (from 1.15 × 10−3 to 1.43 × 10−3). Mean Lwnet changed from 165.63 at early morning to 173.52 W/m2 at late afternoon, point out its significant importance in the total balance of heat flux of eastern harbor surface. Latent heat flux and Lwnet were positive (energy losing from eastern harbor), throughout the day. The daily average of net energy budget (S) was 38.52 W/m2; daytime gain exceeded nighttime loss, with consequent heating the eastern harbor. Qualitatively, daily variations of net energy budget (S) were nearly consistent with time delay to the variability of sea surface temperature, indicating the predominant role of the heat budget of the surface layer in modulating surface temperatures of the Eastern Harbor. Keywords: heat flux, shortwave, long wave, latent heat, sensible heat, Eastern Harbor

scholarly journals Energy budget and carbon footprint in a wheat and maize system under ridge furrow strategy in dry semi humid areas

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Changjiang Li ◽  
Shuo Li
Keyword(s):  
Carbon Footprint ◽  
Energy Budget ◽  
Agricultural Development ◽  
Energy Use ◽  
Cropping System ◽  
Energy Output ◽  
Net Energy ◽  
Energy Productivity ◽  
Carbon Efficiency ◽  
Net Returns

AbstractThe well-irrigated planting strategy (WI) consumes a large amount of energy and exacerbates greenhouse gas emissions, endangering the sustainable agricultural production. This 2-year work aims to estimate the economic benefit, energy budget and carbon footprint of a wheat–maize double cropping system under conventional rain-fed flat planting (irrigation once a year, control), ridge–furrows with plastic film mulching on the ridge (irrigation once a year, RP), and the WI in dry semi-humid areas of China. Significantly higher wheat and maize yields and net returns were achieved under RP than those under the control, while a visible reduction was found for wheat yields when compared with the WI. The ratio of benefit: cost under RP was also higher by 10.5% than that under the control in the first rotation cycle, but did not differ with those under WI. The net energy output and carbon output followed the same trends with net returns, but the RP had the largest energy use efficiency, energy productivity carbon efficiency and carbon sustainability among treatments. Therefore, the RP was an effective substitution for well–irrigated planting strategy for achieving sustained agricultural development in dry semi-humid areas.

Energy Budgeting of Paddy-Pulse Cropping System in Bhadrak District of Odisha and Assessment of Emission from Paddy Straw Burning

2021 ◽  
Vol 58 (03) ◽  
pp. 222-240
Author(s):  
Bhabani Shankar Dash ◽  
Sangram Keshari Swain ◽  
Debaraj Behera ◽  
Padma Lochan Pradhan ◽  
Pramod Kumar Sahoo ◽  
...  
Keyword(s):  
Energy Use ◽  
Cropping System ◽  
Paddy Fields ◽  
Output Energy ◽  
Total Output ◽  
Net Energy ◽  
Input Energy ◽  
Paddy Straw ◽  
Land Preparation ◽  
Straw Burning

Energy auditing of an existing production system helps to assess its energy-use and energy efficiency. The average input energy of paddy-black gram (PB) cropping system (19,862.01 MJ.ha-1) was higher than paddy-green gram (PG) (18,972.34 MJ.ha-1) cropping system in Bhadrak, Odisha. Harvesting and transport operation required highest operational energy for PG (35.57%) and PB (41.20%) farms; while, threshing and winnowing consumed the second highest input energy with 21.34% and 22.71% for PG and PB farms, followed by land preparation with 21.87% and 20.10% respectively. Linear regression data of PG and PB systems showed significant effect (p<0.05) of predictors with R2 values of 87.70% and 82.20% for total output energy and grain energy, respectively; confirming a good fit among the data. The output energy of PB cropping system was 13.91% higher than that of PG cropping system. The PB cropping system, with energy utilisation efficiency (EUE) of 10.31 and 11.82, was more energy-efficient than PG system with EUE of 9.32 and 11.01 for “NC” and “C” farms, respectively. The net energy return of PBC farm was highest with 2,04,505.31 MJ.ha-1. Amongst various pollutants emitted from paddy straw burning in Odisha; CO2 (5,51,296.0 Mg.yr-1), CO (13,102.72 Mg.yr-1), and TPM (4,908.80 Mg.yr-1) had highest share. The quantity of major GHGs (N2 O, CH4 ) released into the atmosphere through paddy straw burning was estimated as 26.43 Mg.yr-1 and 453.12 Mg.yr-1, respectively. Use of straw baler can prevent straw burning, and reduce emission from paddy fields by 2805.54 kg.ha-1 of CO2 and 66.69 kg.ha-1 of CO, 5.96 kg.ha-1 of NOx , 24.98 kg.ha-1 of TPM. Alternatively, use of mulcher can also reduce emission from paddy fields by 2924.44 kg.ha-1 of CO2 and 69.51 kg.ha-1 of CO, 6.21 kg.ha-1 of NOx , 26.04 kg.ha-1 of TPM. The cost of operation of a baler and mulcher were 8,617.0 ₹ ha-1 and 2,543.0 ₹ ha-1, respectively. Input energy and energy saved in paddy fields by baler were 820.0 MJ.ha-1 and 16,928.0 MJ.ha-1; and 266.0 MJ.ha-1 and 24,458.0 MJ.ha-1 by mulcher, respectively

Facile Synthesis of Nitrogen-Rich Porous Organic Polymers for Latent Heat Energy Storage

2018 ◽  
Vol 1 (11) ◽  
pp. 6535-6540 ◽  
Author(s):  
Jiahuan Li ◽  
Zhonghua Cheng ◽  
Meifang Zhu ◽  
Arne Thomas ◽  
Yaozu Liao
Keyword(s):  
Energy Storage ◽  
Latent Heat ◽  
Heat Energy ◽  
Organic Polymers ◽  
Facile Synthesis ◽  
Porous Organic Polymers

Performance evaluation of latent heat energy storage in horizontal shell-and-finned tube for solar application

2015 ◽  
Vol 123 (2) ◽  
pp. 1371-1381 ◽  
Author(s):  
S. Paria ◽  
S. Baradaran ◽  
Ahmad Amiri ◽  
A. A. D. Sarhan ◽  
S. N. Kazi
Keyword(s):  
Performance Evaluation ◽  
Energy Storage ◽  
Latent Heat ◽  
Finned Tube ◽  
Heat Energy ◽  
Solar Application
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