Ultra Sil is the biologically activated potentialised herbal extract based on sanjeevan system of medicine. It contains Adhatoda vasaka (0.01%), Cardiospermum helicacabum (0.01%), Embelia ribes (0.01%), aqua solvent (99.97%). It activates the extraction of silica by controlling the opening of stomata so the roots are stimulated to absorb silica from soil. The field experiment was conducted at Post Graduate Institute, Research Farm, during rabi season, 2011-12 with view to study the response of foliar application of Ultra Sil (herbal extract) on nutrient uptake and yield of maize. The foliar...