Our solution is to install a solar-powered timer device that can be connected to the motor pump used for watering crops in agriculture. This timer can be set to automatically turn on and off the motor pump at specific times, which eliminates the need for farmers to physically travel to the field. The solar-powered timer is a cost-effective and low-maintenance option. It allows farmers to customize the watering schedule by feeding data on when to turn the pump on and off.

1. The solar-powered timer device is connected to the motor pump. The farmer inputs the desired watering schedule into the timer, specifying the times for turning the pump on and off. The timer uses energy from the sun, captured by solar panels, to power its operation. At the predetermined times, the timer sends signals to the motor pump, instructing it to start or stop the water flow accordingly. This automated process ensures that crops receive water at the right times without manually.

There are several benefits to using a solar-powered timer for agricultural watering. Firstly, it saves time and effort for farmers, as they don't have to manually operate the motor pump. Secondly, it reduces water waste by ensuring precise and efficient irrigation. This will result in increase in crop yield, as crops recieve water at particular time.  Thirdly, it conserves energy by utilizing solar power, which is a renewable and sustainable energy source. Additionally, it offers customization options to suit the specific watering needs of different crops.

The solar-powered timer solution is different from other methods because it combines the benefits of automation, solar energy, and customization. Traditional methods of irrigation may require manual operation, which can be time-consuming and less accurate. Other automated solutions may rely on non-renewable energy sources, increasing costs and environmental impact. The solar-powered timer addresses these issues by offering a sustainable and customizable approach to agricultural watering.

One major risk is the dependence on sunlight for powering the timer. If there are large periods of cloudy or rainy weather, the timer's efficiency may be affected. There should be backups available, but this may result in increase of cost of the system. Moreover, farmers should be trained so that they could customize the time on the basis of their needs. 

1. Manufacturing solar-powered timer devices and necessary equipment, including solar panels.

2. Installing the solar panels in an best location to capture sunlight.

3. Connecting the solar-powered timer to the motor pump system.

4. Providing training and instructions to farmers on how to set and adjust the timer for their specific watering needs.

The solution should be evaluted on the basis of its sustainable goals like "Sustainable and Clean Energy", as it uses solar power, and it also increases crop yield by providing water at particular time to the crops, automatically, reducing farmers effort.