Before sowing of garlic and onion, fine sand from the sea shore is mixed with castor oil and sprinkled on the seedbed and then after planting is done. The practice is found to increase the size of onion bulb and garlic rhizomes.
Crop: Garlic and Onion
Crop Family: Amaryllidaceae
Crop Scientific Name: Garlic-(Allium sativum), Onion-(Allium cepa)
Crop Vernacular Name: Garlic-Roshun, Lesun; Onion- Peyaz, Piyaz
Ingredients: Fine sand from the sea shore, castor oil
“Growth, bolting and yield of garlic (Allium sativum L.) in response to clove chilling treatment”
https://www.sciencedirect.com/science/article/abs/pii/S0304423815300935
“The alliin content in bulbs could be doubled by S fertilization.”
https://www.tandfonline.com/doi/abs/10.1081/PLN-200026433