Seeds of cotton (Gossypium herbaceum) are rubbed with black soil and planted. These seeds sprout much faster and output is improved.
Crop: Cotton
Crop Family: Malvaceae
Crop Scientific Name: (Gossypium herbaceum)
Crop Vernacular Name: Kapaas, rui
Formulation: Seeds of cotton (Gossypium herbaceum)
Ingredients: Black soil, seeds of cotton (Gossypium herbaceum)
"Tillage Depth, Tillage Timing, And Cover Crop Effects On Cotton Yield, Soil Strength, And Tillage Energy Requirements"
https://pubag.nal.usda.gov/download/14353/PDF
"Applying a combination of both organic materials and effective microorganisms resulted in a 44% increase in Cotton yield over control."
http://blogg.bokashi.se/wp-content/uploads/2018/05/EM-NPK_-Pakistan.pdf
"Using forage turnip as a cover crop provided an increased cotton yield, and this practice can be recommended."
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-86212015000100075