Crop yield simulation optimization using precision irrigation and subsurface water retention technology

2019 ◽  
Vol 119 ◽  
pp. 433-444 ◽  
Author(s):  
Proteek Chandan Roy ◽  
Andrey Guber ◽  
Mohammad Abouali ◽  
A. Pouyan Nejadhashemi ◽  
Kalyanmoy Deb ◽  
...  
Keyword(s):  
Crop Yield ◽  
Water Retention ◽  
Simulation Optimization ◽  
Subsurface Water ◽  
Crop Yield Simulation ◽  
Precision Irrigation

scholarly journals Subsurface Water Retention a Technology for Increasing the Field Use Efficiency and Water Saving Values of Cucumber Plant

2019 ◽  
Vol 25 (9) ◽  
pp. 54-61
Author(s):  
Fatima Sadoon Mushab ◽  
Sabah Anwer Almasaf
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Crop Yield ◽  
Irrigation Water ◽  
Water Retention ◽  
Root Zone ◽  
Subsurface Water ◽  
Cucumber Plant ◽  
Trickle Irrigation ◽  
Use Efficiency

The technology of subsurface soil water retention (SWRT) uses a polyethylene ‎trough that is fixed under the root zone of the plant. It is a modern technology to increase the values of water ‎use efficiency, plant productivity and saving irrigation water by applying as little irrigation water ‎as possible. This study work aims at improving the crop yield and water use efficiency of a cucumber plant with less applied irrigation water by installing membrane trough below the soil surface. The field experiment was conducted in the Hawr Rajab District of ‎Baghdad Governorate in Winter 2018 for testing various trickle irrigation ‎systems. Two agricultural ‎treatment plots were utilized in a greenhouse for the comparison. Plot T1 has used ‎a subsurface trickle irrigation together with membrane trough.  Plot T2 has used only ‎surface trickle irrigation system without using SWRT. The total area of the plots T1and T2 was 13.2 ‎m2 and 6.66 m2, respectively. The obtained results of the study confirmed that the plot T1 satisfies values greater than plot ‎T2 in terms of crop yield, field water use efficiency and in saving the applied irrigation water. The increase rate of field water use efficiency and crop yield in plot T1 compared with plot T2 was 103 %, ‎and 24 %, respectively. Additionally, the increase rate in saving the applied irrigation water ‎in plot T1 comparing with plot T2 was 64 %. The installation of the membrane trough below the plant’s root zone together with subsurface trickle irrigation system assisted in keeping the water, nutrients, and fertilizers during the root zone profile, improving the field water use efficiency and then the parameter of water productivity. ‎  Subsurface trickle irrigation, subsurface water retention technology, yield, ‎water use efficiency.

Simulation Optimization of Water Usage and Crop Yield Using Precision Irrigation

2019 ◽  
pp. 695-706
Author(s):  
Proteek Chandan Roy ◽  
Andrey Guber ◽  
Mohammad Abouali ◽  
A. Pouyan Nejadhashemi ◽  
Kalyanmoy Deb ◽  
...  
Keyword(s):  
Crop Yield ◽  
Simulation Optimization ◽  
Water Usage ◽  
Precision Irrigation

scholarly journals Spatial–Temporal Impacts of Urban Sprawl on Ecosystem Services: Implications for Urban Planning in The Process of Rapid Urbanization

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1210
Author(s):  
Xiaoyan Li ◽  
Gulinaer Suoerdahan ◽  
Zhenyu Shi ◽  
Zihan Xing ◽  
Yongxing Ren ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Urban Planning ◽  
Carbon Storage ◽  
Crop Yield ◽  
Urban Sprawl ◽  
Habitat Suitability ◽  
Urban Areas ◽  
Water Retention ◽  
Rapid Urbanization ◽  
Study Region

Rapid urbanization drives land cover change, affecting urban ecosystems and inducing serious environmental issues. The study region of Changchun, China was divided into three urbanization categories according to different urbanization levels and the characteristics of urban sprawl and changes and relationships between typical ecosystem services (ESs) under rapid urbanization were analysed. The results showed that Changchun has undergone considerable urban expansion since 2000, which has significantly impacted all ESs in terms of spatial and temporal heterogeneity. Habitat suitability and crop yield have relatively stronger service capacity in the study area. Since the expansion of large-scale infrastructures, the mean ES values of developed urban areas are the lowest among the three zones, except for water retention and sandstorm prevention in 2015, when the balance between all services decreased. Over the past 16 years, habitat suitability in developing urban areas has decreased to a large extent due to urban sprawl. Because of the improvement in agricultural science and technology, crop yield in three regions increased, while the area of cropland reduced from 1720 km2 to 1560 km2 (9.3%). Synergies between habitat suitability and carbon storage and habitat suitability and soil retention were detected in three areas. A trade-off between habitat suitability and water retention was detected in three areas. The interactions between crop yield and carbon storage, habitat suitability, and soil retention were more complex in this study region. In addition to water retention, urbanization index has a negative correlation with ESs. According to the results, some suggestions to alleviate ES loss during the process of rapid urbanization were proposed, which may guide scientific urban planning for sustainable urban development.

Comparative study of two crop yield simulation models

1996 ◽  
Vol 30 (2) ◽  
pp. 155-173 ◽  
Author(s):  
E. Xevi ◽  
J. Gilley ◽  
J. Feyen
Keyword(s):  
Comparative Study ◽  
Crop Yield ◽  
Simulation Models ◽  
Crop Yield Simulation

Effects of Subsurface Water Retention Technology on Crop Coefficient and Crop Evapotranspiration of Eggplant

2018 ◽  
Vol 24 (8) ◽  
pp. 96
Author(s):  
Sabah Anwer Almasraf ◽  
Ahmed Hatif Salim
Keyword(s):  
Water Retention ◽  
Sandy Loam ◽  
Crop Coefficient ◽  
Growing Season ◽  
Control Plot ◽  
Subsurface Water ◽  
Crop Evapotranspiration ◽  
Initial Development ◽  
Loam Soil ◽  
Crop Coefficients

In this paper, the effects of subsurface water retention technology (SWRT) on crop coefficient (kc) and crop evapotranspiration (ETc) of eggplant were investigated in sandy loam soil. For this purpose, two treatments plot (with SWRT and without using SWRT) were adopted during 93 days of cultivation. The study was conducted in open field within Al-Fahamah Township, Baghdad, Iraq during summer growing season 2017. The accumulated ETc of eggplant was 403.3 and 515.2 mm for SWRT treatment and control plot, respectively by reduction percentage 21.7 %. The average values of ETc during the growing season were 4.3 and 5.5 mm/day, respectively. The crop coefficients value during the growing stages for initial, development, mid-season and late season stages was 0.15, 0.41, 0.81 and 0.78 in SWRT treatment plot for the respective stages and for the control plot one 0.2, 0.46, 1.13 and 0.9, respectively.  

Radiation-use efficiency and the harvest index of winter wheat at different nitrogen levels and their relationships to canopy spectral reflectance

2011 ◽  
Vol 62 (3) ◽  
pp. 208 ◽  
Author(s):  
H. L. Li ◽  
Y. Luo ◽  
J. H. Ma
Keyword(s):  
Crop Yield ◽  
Spectral Reflectance ◽  
Harvest Index ◽  
Crop Production ◽  
Light Interception ◽  
Active Radiation ◽  
Use Efficiency ◽  
Canopy Spectral Reflectance ◽  
Crop Yield Simulation ◽  
Radiation Use

Radiation-use efficiency (RUE, g/MJ) and the harvest index (HI, unitless) are two helpful characteristics in interpreting crop response to environmental and climatic changes. They are also increasingly important for accurate crop yield simulation, but they are affected by various environmental factors. In this study, the RUE and HI of winter wheat and their relationships to canopy spectral reflectance were investigated based on the massive field measurements of five nitrogen (N) treatments. Crop production can be separated into light interception and RUE. The results indicated that during a long period of slow growth from emergence to regreening, the effect of N on crop production mainly showed up in an increased light interception by the canopy. During the period of rapid growth from regreening to maturity, it was present in both light interception and RUE. The temporal variations of RUEAPAR (aboveground biomass produced per unit of photosynthetically active radiation absorbed by the canopy) during the period from regreening to maturity had different patterns corresponding to the N deficiency, N adequacy and N-excess conditions. Moreover, significant relationships were found between the RUEAPAR and the accumulative normalised difference vegetation index (NDVI) in the integrated season (R2 = 0.68), between the HI and the accumulative NDVI after anthesis (R2 = 0.89), and between the RUEgrain (ratio of grain yield to the total amount of photosynthetically active radiation absorbed by the canopy) and the accumulative NDVI of the whole season (R2 = 0.89) and that after anthesis (R2 = 0.94). It suggested that canopy spectral reflectance has the potential to reveal the spatial information of the RUEAPAR, HI and RUEgrain. It is hoped that this information will be useful in improving the accuracy of crop yield simulation in large areas.

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