Dear Sir,
Greetings from SAFS!!
You are Asking cow dung for your mango field, instead of using plain cow dung why dont you use enriched nutrient.
enriched nutrient contain
farm yard manure,vermicompost,azospirillum,phosphobacteria, potash solubilizers, and poly functional microbers and silica for immune development.
it gives better results for mango farm
Available in 3kgsis mrp100/- and 40kgs mrp 1000/- bags it cost.
Further more innovative products are there like solar insect light trap methodology etc..