How to prevent and cure zinc deficiency

Zinc is an indispensable trace element for crops, and zinc deficiency will lead undersized plants, and maize white seedling.

There are some ways to prevent and cure zinc deficiency:

Seed dressing. Put zinc sulfate into a little water, mixing up with seeds, sowing after drying.

Soaking seeds with zinc sulfate solution, and soaking 6-8 hours for corns, the concentration is 0.02-0.05%; and 12 hours for rice, concentration is 0.1%.

Foliar spraying in the early growth stage with 0.1% zinc sulfate when zinc deficiency occurs, spraying every 7-10 days.

Where to buy zinc sulfate in China?
Rech Chemical Co. lTD
http://www.rqsulfates.com