Potassium and Boron are among the most important plant nutrient which has assumed more importance with the advent of greaterplant productivity under intensive cultivation with high use of chemical fertilizers. Antioxidants such as ascorbic acid and nicotinamide are also known as growth regulating chemicals in plants, influencing growth and yield of different crops via variety of physiobiochemical mechanisms. Thus, two field trails were done in sandy soil at two winter seasons of 2018/2019 & 2019/2020 at Research and Production Station, National Research Centre, El-Nubaria Province, El-Behera Governorate, Egypt. This work aimed to investigate the impact of exogenous treatment of potassium (500ml/L), boron (100 ml/L)and/ orfoliar ascorbic acid (200mg/L) and nicotinamide (50mg/L) on growth, various physiobiochemical attributes, yield andits characters as well as some nutrient components of chickpea yielded seeds. The obtained results showed that, potassium and boron treatment increased growth and yield components of chickpea plant via improving the studied physiological processes as photosynthetic pigments, IAA, phenolics and some osmptotectants. In addition, foliar treatment of ascorbic acid or nicotinamide increased significantly the above mentioned parameters, However, Nic was more effective than AsA .Moreover the interaction between K or B and/ or AsA or Nic gave more increases in the above mentioned parameters. Finally it could be concluded that exogenous application or K, B and/or AsA and Nic were effective in improving growth and yield of chickopea plant grown under sandy soil