Journal of Tea Science Research, 2024, Vol.14, No.4, 215-224 http://hortherbpublisher.com/index.php/jtsr 221 Figure 4 Phenological features of tea plantations and other land cover types in the study area (Adopted from Li et al., 2019) Image caption: (a–c) are true color composites (band 7 in red, band 4 in green, and band 3 in blue) created from VENμS images taken in February, May, and August, 2018, respectively; A to E are tea plantation, broadleaf forest, bamboo forest, bare soil, and impervious surface, respectively; (d–f) are their spectral characteristics at the corresponding time; (g–i) are photos of tea plantations at the corresponding time (Adopted from Li et al., 2019) 6.3 Outcomes and lessons learned The outcomes of high-yield cultivation practices in Zhejiang Province have been largely positive, with significant increases in tea yield and quality. The implementation of high planting densities and the use of clonal varieties have proven effective in maximizing production. Furthermore, the dual reduction of chemical fertilizers and pesticides has not only maintained but also enhanced tea quality, while reducing environmental hazards. These practices have demonstrated that sustainable agronomic methods can achieve high yields without compromising ecological integrity. Several lessons can be drawn from the experience in Zhejiang Province. The importance of adopting scientifically-backed agronomic practices, such as high-density planting and the use of clonal varieties, cannot be overstated. These methods have been critical in achieving high yields and can be applied to other tea-growing regions to improve productivity. Second, the integration of ecological considerations into agronomic practices is essential for sustainable tea cultivation. The success of organic fertilizer replacement and pesticide reduction in Zhejiang highlights the potential for similar approaches in other regions facing environmental challenges (Xie et al., 2018). Moreover, the use of advanced technologies, such as high-resolution imagery for plantation mapping, can enhance the management and monitoring of tea cultivation, ensuring both high yields and ecological sustainability (Li et al., 2019). 7 Economic Aspects of High-Yield Tea Cultivation 7.1 Cost-benefit analysis The economic evaluation of high-yield tea cultivation techniques involves a detailed analysis of input costs versus returns. In Anji County, China, the rapid expansion of tea plantations from 1985 to 2016 has shown a significant
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