Effect of Varieties and Graded Levels of Fertilizer on Quality of Niger under Rainfed Condition of Assam
Nikita Kaman *
Department of Agronomy, Assam Agricultural University, Jail Road, Borbheta, India.
Nayanjyoti Ojah
Department of Agronomy, Assam Agricultural University, Jail Road, Borbheta, India.
Rinjumoni Dutta
Department of Agronomy, Assam Agricultural University, Jail Road, Borbheta, India.
Anjali Basumatary
Department of Soil Science, , Assam Agricultural University, Jail Road, Borbheta, India.
*Author to whom correspondence should be addressed.
Abstract
During the rabi season of 2019-20, a field experiment entitled “Effect of varieties and graded levels of fertilizer on quality of niger under rainfed condition of Assam” was conducted at Instructional-cum-Research (ICR) Farm, Assam Agricultural University, Jorhat to assess the effect of graded levels of NPK and varieties on quality of niger. The experiment was laid out in a Randomized Block Design (Factorial) with three replications. The treatments consisted of four varieties viz., V1: NG-1, V2: GA-10, V3: JNS-9 and V4: NB-1 and four grades of NPK viz., F1: 10-5-5 kg N-P2O5-K2O/ha, F2: 20-10-10 kg N-P2O5-K2O/ha, F3: 30-15-15 kg N-P2O5-K2O/ha and F4: 40-20-20 kg N-P2O5-K2O/ha. Experimental findings revealed that the variety GA-10 produced significantly higher oil content (38.76%) and protein content (16.65%) which was at par with JNS-9. Different variety did not bring any significant change in the iodine value and saponification value of oil. The highest oil content was recorded due to the application of 30-15-15 kg N-P2O5-K2O /ha. Significantly higher seed protein content was registered with 40-20-20 kg N-P2O5-K2O /ha which was at par with 30-15-15 kg N-P2O5-K2O /ha. However, graded levels of NPK did not influence the iodine and saponification value of oil.
Keywords: Niger, oil content, protein content, iodine value, saponification value