Agriculture involves cultivating crops and rearing livestock on soil. There are different types of farming systems based on demand, labor availability, and technology level including primitive subsistence farming where almost all produce is used to support the household, intensive subsistence farming where farms are smaller, and commercial farming where crops and livestock are reared for sale in markets. The document asks recapitulatory questions about conventional agriculture, commercial agriculture, rice growing conditions, and distinguishing between subsistence and commercial farming.