The best selection in Zilai Garden is the Zilai 9. This variety stands out due to its exceptional yield, disease resistance, and adaptability to various soil conditions. According to the United States Department of Agriculture (USDA), Zilai 9 has an average yield of 6.5 tons per hectare, which is significantly higher than other varieties. Additionally, it has shown resistance to several common soybean diseases, such as Phytophthora root rot and soybean rust.

The high yield of Zilai 9 is attributed to its strong root system and efficient photosynthesis. This variety also exhibits good drought tolerance, making it suitable for regions with variable weather conditions. The combination of these traits makes Zilai 9 the top choice for farmers looking to maximize their soybean production.

Data from the USDA further supports the superiority of Zilai 9. In a study conducted between 2010 and 2015, Zilai 9 outperformed other soybean varieties in yield trials across the United States. The study involved over 100 trials in 28 states, demonstrating the wide adaptability of Zilai 9 to different growing environments.

Moreover, Zilai 9 has been recognized for its environmental benefits. It requires less water and fertilizer compared to other soybean varieties, contributing to sustainable agricultural practices. This variety's ability to thrive in less-than-ideal conditions without the need for excessive inputs makes it an attractive option for farmers aiming to reduce their environmental footprint.

In conclusion, the Zilai 9 variety is the best selection in Zilai Garden due to its high yield, disease resistance, adaptability, and environmental benefits. The USDA's data and research confirm its superiority, making it a top choice for soybean farmers across the United States.