Methods for increasing chromium in white kidney beans

A method for increasing chromium in white kidney bean comprising:

• preparing field including loosening the field, applying organic fertilizer, then harrowing the field, and creating ridges with a trench depth approximately from 10 to 30 cm, trench width from 1.5 to 2.5 m, and ridge width of 1 to 2 m;
• performing a first treatment to the seeds of the white kidney bean including immersing the seeds in a slurry and adding a protective agent;
• performing a second treatment during the seeding period of the white kidney bean including spraying a first solution having 12-185 kg/hectare of diammonium phosphate, 2.4-124 kg/hectare of calcium superphosphate, 25-185 kg/hectare of urea, 10 to 30 ppm chromium (III) chloride and 0.25-25 kg/hectare of zinc sulfate;
• performing a third treatment during the flowering period of the white kidney bean including spraying a second solution having 1.2-62 kg/hectare of dipotassium phosphate, 1.2-49 kg/hectare of zinc sulfate, 0.12-12 kg/hectare of salicylic acid, and 0.12-12 kg/hectare of chlorogenic acid;
• performing a fourth treatment during the fruiting period of the white kidney bean including spraying a third solution having 0.32-32 kg/hectare of salicylic acid, 0.32-32 kg/hectare of chlorogenic acid, and 1.2-49 kg/hectare of zinc sulfate;
• and
• performing a fifth treatment during the maturing period of the white kidney bean including spraying a fourth solution having 0.32-7.4 kg/hectare of salicylic acid and 0.32-7.4 kg/hectare of chlorogenic acid.