Impact of Integration between Soil Application of Phosphorus and Foliar Spraying of Nano Potassium, Iron and Boron on the Productivity and Quality of Peanuts.

Two years field experiment was carried out to assess the impact of three phosphorus application (P0; untreated control, 55.8 (P1) and 93.0 (P2) kg phosphorus pentoxide (P2O5) ha-1) and nano fertilizer treatments (i.e., untreated control; 500 ppm nano potassium (K1); 1000 ppm nano potassium (K2); 50 ppm nano boron (B1); 100 ppm nano boron (B2); 75 ppm nano iron (Fe1); 150 ppm nano iron (Fe2) on yield and quality parameters. The results revealed significant differences among phosphorus fertilizers levels, the increasing rate of P to 93.0 kg P2O5 ha-1 (P2) enhanced the number of pods plants-1, number of branches plants-1, seed index, pod yield, seed yield, protein yield and oil yield compared to control, during 2020 and 2021 seasons. Likewise, peanut plants treated with nano-boron at 100 ppm (B1) gave the highest value of number of pods plants-1, while, application of nano-Fe at 150 (Fe2) and 75 ppm (Fe1) gave the highest value of number of branches plants-1, on the other hand application of 1000 ppm nano potassium (K2) were achieve the highest values of seed index, pod, seed, protein and oil yield. The combinations of P and nano-fertilization of K, B, Fe, displayed significant effects on pods No. plants-1, branches No. plants-1 and seed index. Concerning the interaction between P2 and nano B2, recorded the highest number of pods plants-1. On the other hand, application of P2 with K2 recorded the highest values of seed index, pod and seed yield.