USDA soil taxonomy

Vertisols are a group of heavy-textured soils which are found in the tropics, subtropics and warm temperate zones. They could be known Dark Clays and many different names mostly related to their dark color; Sixty percent of the Vertisols are in the tropics, 30 % in the subtropics and 10 % in colder regions. The major areas of Vertisols are found in Australia, India, Sudan, Chad, US, China, and Ethiopia. Vertisols are an important soil in agriculture, although they cover only a small area of the land

Chapter 2 1.0 Jambosa jambos (wax apple) or Syzygium samarangense 1.1 Botany 1.1.1 Origin and distribution This wax apple is origin in Malaysia. Wax apple is a species in the Myrtaceae is a tropical fruit that comes and thought to be native range from Southeast Asia are found in Indonesia, India, Malaysia and Philippines. J. jambos is likely that the species is now majority in the humid tropics countries. (Morton, 1987) 1.1.2 Common name Synonym of Jambosa jambos has several common names

[12.3] Soil [13] Types of Soil [13.2] Humus and Composts [13.3] Texture [13.4] pH [13.5] Fertilisers [13.6] Techniques for Preparing Soils [13.7] Guerrilla Farming