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5072970 
Journal Article 
Effect of humic acid and fulvic acid based liquid and foliar fertilizers on the yield of wheat crop 
Ahmad, T; Khan, R; Khattak, TN 
2018 
Yes 
Journal of Plant Nutrition
ISSN: 0190-4167
EISSN: 1532-4087 
TAYLOR & FRANCIS INC 
PHILADELPHIA 
41 
19 
2438-2445 
WOS:000456732500003 
An organic-mineral liquid fertigation fertilizer containing humic acid, nitrogen (N)-phosphorus (P)-potassium (K), zinc (Zn), sulfur (S), manganese (Mn) and a liquid foliar fertilizer consisting of fulvic acid and gibberellic acids were formulated and applied to wheat. The purpose of this study was to develop an efficient and cost effective liquid and foliar fertilizer and compare their potential with commercially available urea and DAP. The fulvic acid and humic acids were obtained by alkaline extraction of lignite coal. All the treatments were significant over the control. The application of the liquid fertigation fertilizer and liquid foliar fertilizer along with 50 kg of urea per acre showed the best results biological yield (grain plus straw yield). It was found that the highest yield was obtained in T-6 treatment and the second best results were obtained with T-2 treatment, but has a high cost, while treatment T-6 was the most significant economical and yielded a high income when compared to other treatments. 
alkaline extraction; fulvic acid; gibberellic acid; humic acid; lignite