1 Agronomy and its Scope 2 Seeds and Sowing 3 Cropping System and Crop Rotation 4 Growth and Development of Crops 5 Tillage 6 Crop Density and Geometry  7 Essential Plant Nutrients 8 Manures, Compost and Vermicompost 9 Fertilizers 10 Biofertilizers 11 Weeds 12 Irrigation and Water Management 13 Harvesting and Threshing of Crops 14 Climatic Zones and Herbicide Application 15 Herbicide and Fertilizer Calculation for Small and Large Plots.