Agricultural land optimization to supports sustainable shallot production on fluvial and structural landforms
			
	
 
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				1
				Doctoral Program in Environmental Science, Universitas Gadjah Mada, Indonesia
				 
			 
						
				2
				Research Center of Land Resources Development, Universitas Gadjah Mada, Jl. Kuningan, Karang Malang, Yogyakarta, 55281, Indonesia
				 
			 
						
				3
				Department of Environmental Geography, Universitas Gadjah Mada, Indonesia
				 
			 
						
				4
				Department of Soil, Universitas Gadjah Mada, Jl. Flora, Bulaksumur, Yogyakarta, 55281, Indonesia
				 
			 
						
				5
				Master of Disaster Management, Graduate School, Universitas Gadjah Mada, Indonesia
				 
			 
										
				
				
		
		 
			
			
		
		
		
		
		
		
	
					
		
	 
		
 
 
Ecol. Eng. Environ. Technol. 2025; 3:183-194
		
 
 
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ABSTRACT
As shalot land decreases annually, it is crucial to take deliberate measures to boost production on current agricultural land. This study aimed to formulate a strategy for optimizing shallot agricultural land in two different landscapes in the tropics. A rapid scan approach was used to identify land characteristics, while linear regression analysis was used to identify land limiting factors on shallot productivity. Literature and DPSIR (Driving Forces, Pressures, States, Impacts, and Responses) were used to develop a land optimization strategy. Typically, the pedogeomorphology analysis showed that both landscapes studied had initial alkaline conditions. Specifically, the fluvial landscape experienced a drastic acidification range (pH 4.55-7.39) due to anthropogenic factors, while the structural landscape maintained its alkaline conditions (pH 6.58-7.74). The regression results showed that the anthropogenic modifications made soil pH and EC limiting factors for productivity (R² = 0.61 for pH; R² = 0.68 for EC). Optimal results were consistently at pH conditions approaching neutral, with EC approaching one dS/m. Finally, land and water management is the best response to land optimization, accompanied by policies favoring local farmers. These findings can be used in policy-making to manage shallot agricultural land in other tropical areas.