 PDF(286 KB)
						
							PDF(286 KB) 
						
						
					 
			Effect of long-term application of K fertilizer on spring maize yield and soil K in northeast China
 PDF(286 KB)
						
							PDF(286 KB) 
						
						
					 PDF(286 KB)
						
							PDF(286 KB) 
						
						
					Effect of long-term application of K fertilizer on spring maize yield and soil K in northeast China
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