In chili farming, having the knowledge about the morphology, anatomy, and conditions to grow chili trees is very important. Included in that is how farmers know which kind of soil is most suitable for the growth and development of chili trees.
From my experience in farming lado F1 variety chili crops and other varieties, the most suitable choice of soil is sandy clay.
Sandy clay has three components: dust, nutrients, and sand. This type of clay contains a lot of minerals needed by your chili crops like calcium, potassium, and others. Sandy clay can be found on farming and horticulture plantation area near irrigation pipes or rivers, or on the fields in hills or mountains.
Sandy clay has been proven has the best planting medium for chili crops with perfectly shaped roots, stems, leaves, flowers, and fruits in the perfect amount, too. Organs and harvests are all strong and healthy, usually.
I hope this is the information you need for your gardening needs. Good luck!