Rajesh Chandran & Abdul Salam M. (1987). Effect Of Different Levels Of Nitrogen Phosphorus & Potassium On The Growth & Yield Of Vegetable Cowpea Var. Kurutholapayar Grown As An Intercrop In The Coconut Gardens & In The Open. Department of agronomy, College of Agriculture.

Rajesh Chandran and Abdul Salam M. Effect Of Different Levels Of Nitrogen Phosphorus & Potassium On The Growth & Yield Of Vegetable Cowpea Var. Kurutholapayar Grown As An Intercrop In The Coconut Gardens & In The Open. Vellayani: Department of agronomy, College of Agriculture, 1987.

Rajesh Chandran and Abdul Salam M. Effect Of Different Levels Of Nitrogen Phosphorus & Potassium On The Growth & Yield Of Vegetable Cowpea Var. Kurutholapayar Grown As An Intercrop In The Coconut Gardens & In The Open. Department of agronomy, College of Agriculture, 1987.