Rice: staple diet of tropical regions, grows best in alluvial clayey soil, leading producers are China, India, Japan, Sri Lanka, Egypt
Wheat: requires moderate temperature, bright sunshine at harvest, thrives in well-drained loamy soil, extensively grown in various countries including USA, Canada, India
Maize: requires moderate temperature, rainfall, lots of sunshine, grown in various countries including North America, Brazil, China, India, Mexico
Cotton: requires high temperature, light rainfall, frost-free days, grows best on black and alluvial soils, leading producers are China, USA, India, Pakistan, Brazil, Egypt
Jute: known as 'Golden Fibre', grows well on alluvial soil, requires high temperatures, heavy rainfall, humid climate, leading producers are India, Bangladesh
Coffee: requires warm, wet climate, well-drained loamy soil, grown on hill slopes, leading producers are Brazil, Columbia, India
Tea: grown on plantations, requires cool climate, high rainfall, well-drained loamy soils, leading producers are Kenya, India, China, Sri Lanka
Efforts in agricultural development to increase farm production for growing population demand
Ways to increase farm production include expanding cropped area, growing more crops, improving irrigation, using fertilisers, high yielding seeds
Aim of agricultural development is to increase food security