Cost of manufacture of N fertilizers depend on Availability of nitrogeneous gas, it is cheapoer if petrolium industry near by factory.

Thanks sir, it means pereeolium industry decide the overall fertiliser production particularly nitrogen.

In most of the part of world nitrogenous fertilizer not easily accessible

Nitrogenous biochar can be a good option for the costliest fertilizer. Plz find the paper below.

Biochar can not able to fulfill crop's requirement of Nitrogen

Dear Ashok Kumar Sir...plz find attached article on nitrogenous biochar.

Thanks for good link and it is wel established fact integration of organic and inorganic found best, but not alone organic or inorganic

Organic Farming is very dificult to individual considering availability of agro input.

Professor Ashokkumar V. Rajani is correct in the assessment that biochar is largely Nitrogen deficient. The combination of urea with biochar would be useful in a semi arid or arid alkaline soil environment. The biochar immobilizes much of ammonification loss and the conversion to plant acid secretion which the nitrogen is absorped will help meditate the issues of excess alkalinity. Ammonia and Urea is the cheapest Nitrogen resources but do have issues related to acid infertile soils.