Improving nitrogen (N) management of small-scale farming systems in developing countries is crucially important for food security and sustainable development of world agriculture. but it is also very challenging. The N Nutrition Index (NNI) is a reliable indicator for crop N status. and there is an urgent need to develop an effective method to non-destructively estimate crop NNI in di... https://www.hindigyanvishv.com/flash-deal-Iowa-Cubs-Foam-Finger-p32059-hot-value/