Effect of Humic Acid and the Level of Nano and Conventional Nitrogen on the Available and Absorbed Nitrogen Element and the Potato Yield

Abstract A field experiment was carried out during the fall season of 2021 at research station University Anbar - College Agriculture, to find effect humic acid and level nano conventional nitrogen in prepared absorbed element yield potato cultivar Rivera, included two factors: sources their levels, represented by traditional NT 1 , 2 150 300 kg N ha -1 form (urea fertilizer) nano-nitrogen, Nn 3 15, 30 45 sequentially addition control treatment. The second factor H 100 treatment (without addition) according RCBD randomized complete block design with three replications. results were statistically analyzed means coefficients compared 0.05 probability test for least significant difference. study showed following: treatments achieved a remarkable variation content vegetative part tubers, interaction between urea highest as well total uptake. While value marketing outcome. availability ammonium nitrate soil increased increase fertilization levels fertilizer exporters, presence acid. There adding on (AE), which amounted 59.0% 49.0%, lowest decrease efficiency nano-nitrogen treatments. when treating interference . AE, an efficient recovery NUE 60.13% 44.45%. recorded 82.47, 80.14 77.89% respectively, superior 39.72, 29.81% while dual reached nano-source (95.25, 92.08 88.71%) sequentially. Compared source (45.35 31.95%), respectively.