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Global Research journal of Natural Science  
& Technology (GRJNST)  
Volume: 04 - Issue 3 (2026), 2083  
ISSN P: 2790-7643 ISSN E: 2790-7651  
A Vertical Farming and Soilless Cultivation Technologies for Urban  
Food Security  
Received: 18 April 2026. Accepted: 30 April 2026. Published: 18 May 2026  
Gul Muhammad shah (Corresponding author)  
Department of Soil Science Sindh Agriculture University, Tandojam  
ORCID ID: 0009-0006-1677-0204  
Murtaza Ali  
Department of Horticulture, Sindh Agriculture University, Tandojam  
Iqra Sultan Rajput  
Agriculture officer, Agriculture supply and prices department  
Government of Sindh, Shahdadpur, Sanghar  
Mir Baqar Raza Talpur  
Department of Agronomy Sindh agriculture university Tando jam  
GRJNST, Volume: 04 - Issue 3 (2026) / ISSN P: 2790-7643  
Article ID: 2087  
Copyright © 2026 GRJNST. This article is published under an Open Access model. It is made available to the public under the terms of the Creative  
Commons Attribution 4.0 International (CC BY 4.0) license, which permits unrestricted use and distribution  
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Vertical Farming and Soilless Cultivation Technologies for Urban Food Security  
Abstract: Vertical farming and soilless cultivation technologies represent a paradigm shift in urban agriculture,  
addressing the challenges of feeding a projected 9.7 billion global population by 2050 amid arable land loss  
(1.82.4% annually), freshwater scarcity (70% agricultural use), and climate volatility. This review synthesizes  
advancements in hydroponics, aeroponics, and aquaponics decoupling production from soil via nutrient film  
technique (NFT), deep water culture (DWC), and vertical stacking enabling year-round yields up to 390 times  
higher than traditional methods per unit area, with 7095% water savings and reduced pesticide needs. Key  
innovations include LED-optimized spectral lighting (e.g., red:blue ratios for photosynthesis), AI-driven climate  
control (sensors for pH, EC, CO), and integrated pest management (IPM) with beneficial microbes. Economic  
analyses indicate viability in urban settings (ROIs of 35 years for leafy greens), while environmental benefits  
encompass lower carbon footprints (via localized production) and enhanced food security in megacities.  
Challenges like high energy demands (addressed by renewables) and initial costs are mitigated through modular  
designs and subsidies. The integration of these systems promises resilient, localized food chains, aligning with  
SDGs for zero hunger and sustainable cities.  
Keywords: vertical farming, soilless cultivation, hydroponics, aeroponics, aquaponics, urban food security, LED  
lighting, AI climate control, water-use efficiency, nutrient film technique, integrated pest management, carbon  
footprint reduction  
1. Introduction  
The global agricultural landscape is currently undergoing a structural transformation, driven by the imperative to  
feed a population projected to reach 9.7 billion by 2050 while grappling with the systemic degradation of arable  
land and the volatility of climate-induced disruptions (Appicciutoli et al., 2025). Traditional land-based  
agriculture, which accounts for 80% of global deforestation and consumes the vast majority of accessible  
freshwater, is increasingly viewed as a brittle system incapable of ensuring long-term urban food security (Chen,  
2025). In response, soilless cultivation and vertical farming have emerged not merely as supplemental methods,  
but as a comprehensive technological paradigm that decouples food production from the constraints of  
geography, seasonality, and ecological health (Lakhiar et al., 2025). This transition represents a fundamental  
shift from agrarian dependency to industrial-scale precision biological engineering, where variables from spectral  
composition to the microbial environment of the rhizosphere are subject to digital regulation (Tuxun et al.,  
2025). Vertical farming integrates advanced technologies to address urban food security challenges, summarized  
in Figure 1.  
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2. The Technical Evolution of Soilless Cultivation Systems  
Soilless cultivation technology serves as the foundational architecture for modern vertical farming, providing the  
mechanism to bypass the biological and environmental limitations inherent in soil-based growth (Mahrous &  
Abd-Elkader, 2025). The primary objective is the delivery of essential nutrients directly to the root zone in a  
highly available form, eliminating the energy expenditure plants normally dedicate to root expansion (Kumar &  
Verma, 2024).  
2.1 Hydroponic Dynamics and Substrate Innovation  
Hydroponics, the most widely implemented soilless method, relies on mineral-enriched water solutions  
categorized into active and passive systems. The technical maturity of hydroponics has led to various  
configurations such as the Nutrient Film Technique (NFT) and Deep-Water Culture (DWC). Research  
identifies hydroponics as highly efficient, utilizing approximately 13 +/- 10 times less water than traditional  
methods (Salisu et al., 2024).  
A significant trend in 2025 is the shift toward sustainable and environmentally friendly substrates to replace  
traditional rockwool. Researchers are focusing on agricultural waste-based substrates, such as coconut coir, peat  
blends, and bio-based foams (Yake Climate, 2025). The interaction between these substrates and rhizosphere  
microorganisms is a burgeoning field, where synthetic biology can enhance nutrient uptake and plant immunity  
(Tuxun et al., 2025).  
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Figure 2 Mechanistic Architecture and Agro-Ecological Benefits of Hydroponic Soilless Cultivation Systems  
2.2 Aeroponics and the Optimization of Root Oxygenation  
Aeroponics represents the cutting edge of soilless cultivation, suspending plant roots in an enclosed chamber and  
misting them with a nutrient-rich solution. This method eliminates the need for substrates, allowing for  
maximum root oxygenation (Farmonaut, 2026). Studies indicate that aeroponically grown plants can mature up  
to 25% faster and produce yields 20% to 45% higher than standard hydroponic setups. Furthermore,  
aeroponics is the most resource-efficient method, using up to 95% less water than traditional field farming  
(Kumar et al., 2024).  
2.3 Aquaponics and Circular Nutrient Loops  
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Aquaponics integrates aquaculture with hydroponic plant cultivation in a symbiotic environment. In this closed-  
loop system, ammonia-rich waste from fish is converted by nitrifying bacteria into nitrates for plant nourishment  
(Bambhaniya et al., 2023). Case studies from the Netherlands have shown that high-precision aquaponic systems  
can achieve a 98% water recycling rate (Korea Journal of Agricultural Science, 2025).  
Table 1: Comparative Analysis of Primary Soilless Cultivation Systems  
System  
Water Delivery Method  
Water  
Soil  
Savings  
vs.  
Yield Index  
Maintenance  
Complexity  
Hydroponics  
Aeroponics  
Aquaponics  
Soil Farming  
Continuous or periodic flow  
High-pressure fine misting  
Fish waste nutrient cycling  
70% 90%  
95% 98%  
90% 98%  
0% (Baseline)  
8x 10x  
12x 15x  
8x 10x  
Moderate  
High  
Very High  
Low to Moderate  
Manual/Automatic  
irrigation  
1x  
(Baseline)  
3. Engineering the Vertical Farm: Architectural and Mechanical Integration  
Vertical farming utilizes stacked layers within a Controlled Environment Agriculture (CEA) framework to  
maximize productivity per square meter. This paradigm is transformative for land-scarce cities, where one acre of  
vertical farming can yield produce equivalent to 10 to 350 acres of traditional farmland (Living Architecture  
Monitor, 2025).  
3.1 Lighting Spectra and Photosynthetic Optimization  
Artificial lighting, primarily Light-Emitting Diodes (LEDs), is a necessity for stacked systems (PMC, 2025).  
Modern LEDs provide specific wavelengths primarily blue (400500 nm) and red (600700 nm) while  
minimizing energy waste. Recent innovations allow for spectral tuning, adjusting composition based on growth  
stages (Yake Climate, 2025).  
3.2 Architectural Integration in the Smart City  
Agriculture is being integrated directly into urban architecture a concept known as Building-Integrated  
Agriculture (BIA) (Akintuyi, 2024).  
Hybrid Facades: Schools in Shenzhen and Shanghai have tested facades combining solar panels with  
vertical farming, reducing classroom glare by over 20% (Mahrous & Abd-Elkader, 2025).  
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Adaptive Reuse: In Wuppertal, Germany, a former department store was redesigned as a vertical farm  
hub (Bonekämper, 2025).  
Rooftop Greenhouses: Integrated Rooftop Greenhouses (iRTG) leverage waste heat and CO2 from the  
building below to fuel plant growth (Chen & You, 2024).  
4. Digitization and Autonomy: The Role of AI, IoT, and Robotics  
The modern vertical farm functions as a data center. Machine learning and robotics handle the majority of  
operational tasks in what is becoming known as the "Autonomous, Epigenomic Farm" (Otekunrin, 2025).  
4.1 IoT Sensors and Robotics  
IoT sensors monitor parameters such as pH, electrical conductivity (EC), CO2 levels, and vapor pressure deficit  
(VPD) (HashStudioz, 2025). Robotics has advanced to sophisticated autonomous agents:  
The Watney Robot: Developed by Seasony, this robot automates transportation, reducing labor costs  
by 65% and increasing yields by 30% (GreyB, 2025).  
LaserWeeder G2: Carbon Robotics utilizes computer vision and lasers to identify and destroy weeds  
with millimeter precision (Carbon Robotics, 2025).  
ARA Precision Sprayer: Ecorobotix's ARA robot uses AI for plant-by-plant detection, reducing input  
use by up to 95% (Remus et al., 2024).  
5. Biotechnological Frontiers: CRISPR and Crop Diversification  
Advancements in gene editing are expanding the diversity of crops suitable for indoor production (Maximize  
Market Research, 2026).  
1. Rice Genetic Architecture: Scientists have used CRISPR-Cas9 to target the SD1 and DEP1 genes to  
create hyper-compact rice varieties. A truncated mutation of DEP1 has been shown to simultaneously  
increase yield and resistance to sheath blight (Nagai et al., 2018).  
2. Vertical Wheat Success: Wheat yields in vertical farms reached 810 kg/m² annually in 2025,  
compared to 2.63.5 kg/m² in traditional fields (Farmonaut, 2025).  
3. Specialized Micronutrients: In-depth studies on Boron application in soilless mediums, such as coco  
peat, have shown significant improvements in the yield and quality of specialty vegetables (Singh et al.,  
20242024).  
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6. Economic Realities and Policy Transformations  
Despite technological sophistication, the industry faces rigorous economic landscapes characterized by high  
Capital Expenditure (CAPEX) and Operational Expenses (OPEX). Energy consumption for artificial lighting  
typically accounts for 50% to 65% of total electricity usage (PMC, 2025; International Journal of Plant & Soil  
Science, 2025). Economic and policy frameworks critically influence the adoption of vertical farming,  
summarized in Figure 7.  
6.1 Global Policy and Legislation  
National governments are viewing vertical farming as a pillar of national security.  
Singapore: The revised "Singapore Food Story 2.0" targets 20% local consumption of fibre and 30%  
local consumption of protein by 2035 (Begum, 2025; Fu, 2025).  
United States: The proposed Supporting Innovation in Agriculture Act of 2025 (H.R. 1705)  
introduced by Representative Beyer aims to establish investment credits for innovative agricultural  
technology, including precision agriculture and CEA systems (Di Vaio & Ali, 2025).  
New York: The state is establishing an Office of Urban Agriculture to assist with and promote various  
forms of urban farming throughout the state (New York State Senate, 2025).  
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7. Conclusion  
Vertical farming and soilless cultivation technologies offer a robust, scalable solution to urban food insecurity,  
decoupling production from traditional constraints and achieving unprecedented efficiency in resource use and  
output. By leveraging hydroponic/aeroponic/aquaponic systems with digital precision (AI sensors, optimized  
LEDs), these approaches not only mitigate climate and land degradation risks but also reduce environmental  
impacts through localized, pesticide-free operations. Despite barriers such as energy intensity and upfront  
investments, ongoing innovations in renewables, modular infrastructure, and microbial enhancements position  
them as economically viable for global megacities. Ultimately, widespread adoption could transform agriculture  
into a sustainable urban industry, ensuring nutritional equity and resilience in a resource-scarce future.  
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