Add half table spoon of salt into drinking water 500 mls x 2 each and drink them over one hour before entering the field. Drinking plain water only does not help much to prevent heat disorder. 🙏🙏🙏
The reason you are not getting a good crop may be due to lack of nutrients in the soil. A rich, fertile soil is black in colour. It should help if you mix fertiliser with the soil next time you plant seeds or seedlings.