With respect Dipak, Unless you are either an expert in a field, or intend to take many months to read and understand the literature, you cannot write an authoritative review, Paul.
There are many different aspects of the agriculture sector, therefore you, Dipak Aryal , should be more particular and rely on your knowledge. But if you're curious, you may check out review studies on soil health monitoring and deterioration, look into how crop diversity affects the world's food security. Consider the most current advances in biotechnology and genetic engineering for improving crop attributes including yield, disease resistance, and nutritional value. Look into how agricultural systems are affected by climate change.
One of the factors that affects water need is underground water pipeline leakage.
please take a look on my paper entitled "A Novel Technique for Detecting Underground Water Pipeline Leakage Using the Internet of Things" published in Journal of Universal Computer Science.
It is published online: https://lib.jucs.org/article/96377/list/18/