Soil conditions Types of soil: Purple(yellow, red) soils; Clay/loam/sandy soils. Physical nature of soil structure; texture; moisture Chemical nature of soil nutrient status ph. toxic elements(salts), organic matter contents 5. Ecological types of Plants( crop cultivars) Types of crop based on response to temperature and day length: Low temperature and long day crops(wheat) High temperature and short day crops(rice) Types of crop based on maturation period: Early maturity cultivars Medium maturity cultivars Late maturity cultivars4. Soil Conditions Types of soil: Purple(yellow, red) soils; Clay/loam/sandy soils: Physical nature of soil structure; texture; moisture Chemical nature of soil nutrient status, PH, toxic elements(salts), organic matter contents 5. Ecological types of Plants ( crop cultivars) Types of crop based on response to temperature and day length: Low temperature and long day crops (wheat) High temperature and short day crops (rice) Types of crop based on maturation period: Early maturity cultivars Medium maturity cultivars Late maturity cultivars