Genomics and Applied Biology 2026, Vol.17, No.4, 213-225 http://bioscipublisher.com/index.php/gab 223 Higher density improved plant architecture and the percentage of marketable fruit for mechanical harvest in New Mexico green chile, whereas a moderate density of 37,037 plants ha⁻¹ in chili pepper improved yield while also providing moderate weed suppression. For sustainable pepper production, the main implication is that optimized density can increase land productivity without proportionally increasing resource use, but only when density remains within the crop’s tolerance range. Under precision fertigation, higher chili densities up to 106,666 plants ha⁻¹ increased total yield and had positive effects on water, nitrogen, and phosphorus use efficiency, while in rainfed maize moderate density rather than excessive density improved yield stability and resource-use efficiency, offering a useful principle for pepper systems. Sustainability also depends on matching density to microclimate management and climate stress adaptation. Moderate shading improved pepper productivity in some environments, but increasing shade intensity to 60% could reduce fruit yield or fruit number, showing that dense canopies and protective structures must be managed to avoid turning stress protection into light limitatio. At the production-system level, density optimization can support profitability, labor efficiency, and lower input waste when paired with modern management. Mechanized pepper systems showed that reduced planting density improved working conditions while maintaining strong productivity in some settings, and sustainability assessment of greenhouse pepper in southeastern Spain found that a high-productivity system can remain environmentally and economically robust when adapted to changing inputs and resistant cultivars. References Aminifard M., Aroiee H., Ameri A., and Fatemi H., 2012, Effect of plant density and nitrogen fertilizer on growth, yield and fruit quality of sweet pepper (Capsicum annuum L.), African Journal of Agricultural Research, 7(6): 859-866. https://doi.org/10.5897/AJAR10.505 Chaudhari V., Barot D., Patel R., and Masaye S.S., 2024, Precision cultivation of vegetable crops to increase productivity: A review, Asian Research Journal of Agriculture, 17: 235-245. https://doi.org/10.9734/ARJA/2024/v17i3500 De Ávila Silva L., Omena-Garcia R., Condori-Apfata J.A., Costa P.M.D.A., Silva N., Damatta F., Zsögön A., Araújo W., De Toledo Picoli E.A., Sulpice R., and Nunes-Nesi A., 2021, Specific leaf area is modulated by nitrogen via changes in primary metabolism and parenchymal thickness in pepper, Planta, 253(1): 1-13. https://doi.org/10.1007/s00425-020-03519-7 Fadare O., Agele S., and Ajayi G., 2025, Integrating soil, plant and microclimate variables for optimizing resource use and yield of greenhouse grown pepper in a rainforest environment, Journal of Scientific Agriculture, 2021: 1-20. https://doi.org/10.25081/jsa.2025.v9.9501 Farooq T.H., Wu W., Tigabu M., He Z., Rashid M., Gilani M.M., and Wu P., 2019, Growth, biomass production and root development of Chinese fir in relation to initial planting density, Forests, 10(3): 236. https://doi.org/10.3390/f10030236 Febrianto M.R.H., Santosa E., Susila A., Zaman S., Widodo W.D., and Hapsari D.P., 2024, Light intensities affect canopy architecture and fruit characteristics of cayenne pepper (Capsicum frutescens L.), Jurnal Hortikultura Indonesia, 15(1): 23-32. https://doi.org/10.29244/jhi.15.1.23-32 Gálvez A., Albacete A., Martínez-Andújar C., Del Amor F.D., and López-Marín J., 2021, Contrasting rootstock-mediated growth and yield responses in salinized pepper plants (Capsicum annuum L.) are associated with changes in the hormonal balance, International Journal of Molecular Sciences, 22(7): 3297. https://doi.org/10.3390/ijms22073297 Gao Y., Chen J., Wang G., Liu Z., Sun W., Zhang Y., and Zhang X., 2022, Different responses in root water uptake of summer maize to planting density and nitrogen fertilization, Frontiers in Plant Science, 13: 918043. https://doi.org/10.3389/fpls.2022.918043 Grasso R., Peña-Fleitas M.T., Gallardo M., Thompson R., and Padilla F., 2021, Tillage effects on soil properties, crop responses and root density of sweet pepper (Capsicum annuum), Spanish Journal of Agricultural Research, 19(2): e0902-e0902. https://doi.org/10.5424/sjar/2021192-17004 Kang W., Sim Y.M., Koo N., Nam J.Y., Lee J., Kim N., Jang H., Kim Y.M., and Yeom S.I., 2020, Transcriptome profiling of abiotic responses to heat, cold, salt, and osmotic stress of Capsicum annuum L., Scientific Data, 7(1): 17. https://doi.org/10.1038/s41597-020-0352-7
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