Effect of organic and inorganic nutrients applied on nutrient content and nutrients uptake by sorghum (Sorghum bicolor L.)

The present study was conducted under a RBD with three replications and 13 different organic and inorganic treatment combinations at Students Instructional Farm during Kharif season of 2021-2022 and 2022-23. During the two years observation recorded and analysed for content and uptake of different nutrient like nitrogen, phasphorus, potassium and crude protein by sorghum. Integration of organic and inorganic sources of nutrients showed better effect on vegetative growth parameters as well as yield parameters of the sorghum crop. Application of 100% RDF + Bio-fertilizers (Azotobacter + PSB) proved superior to other treatments from yield point of view. Application of 100% RDF (120:60:60: 40: N:P:K:S, kg ha^-1), proved better in terms of benefit cost ratio. Recommended NPK proved advantageous in terms of gross return and net return and benefit cost ratio. Application of higher doses of NPK might have resulted in vigorous vegetative as well as profuse root growth, which leads to better absorption of nutrients from soil and thus absorbed higher quantities of NPK. Further nutrient uptake is a function of dry matter yield and content of respective nutrients. Therefore, improvement in both these factors resulted in higher uptake of added nutrients.