Effect of Varieties and Graded Levels of Fertilizer on Quality of Niger under Rainfed Condition of Assam

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.