Seed rate is the quantity of seed required for sowing or planting in an unit area. The seed rate for a particular crop would depend not only on its seed size/test weight, but also on its desired population, germination percentage and purity percentage of seed. It is calculated as follows:
Seed rate (kg)= Area to be sown in m2 * Test weight of the seed * 1 _____________________________________
Germination%* Purity%* Spacing (m)* 1000
Crops Particulars Seed Rate
Rice : Transplanting 60 – 85 kg/ha
Broad casting 80 – 100 kg/ha
Dibbling 80 – 90 kg/ha
Maize 20 kg/ha
Ragi Direct sown 5 kg/ha
Transplanted crop 4 – 5 kg/ha
Sorghum 12 -15 kg/ha
Blackgram Pure crop 20 kg/ha
Mixed crop 6 kg/ha
Cowpea
1.For vegetable type
a. Bush 20 – 25 kg/ha
b. Trailing 4 – 5 kg/ha
2.For grain and dual purpose
a. Broadcasting 60 – 65 kg/ha
b. Dibbling 50 – 60 kg/ha
Green gram Pure crop 20 – 25 kg/ha
Mixed crop 6 kg/ha
Green pea 60 kg/ha
Horse gram 25 – 30 kg/ha
Red gram Pure crop 15 -20 kg/ha
Mixed crop 6 – 7 kg/ha
Amorphophallus 9 – 12 tonnes /ha
Colocasia 800 – 1200 kg/ha
Greater yam ( Kachil) 3000-3700 kg/ha
Lesser yam 1800-2700 kg/ha
Sweet potato 80 kg tubers/ha
Tapioca 2000 stems/ha
Rubber 450 – 500 plants/ha
Ground nut Pure crop 100 kg kernals/ha
Inter crop in coconut 80 kg kernel/ha
Inter crop in Tapioca 40 – 50 kg kernel/ha
Sesame 4 – 5 kg/ha
Mango Ginger 1500 kg/ha
Ginger 1500 kg/ha
Turmeric 2000-2500 kg/ha
Betel vine 20000-25000 cuttings/ha
Okra 7 – 8.5 kg/ha
Bitter gourd 5 – 6 kg/ha
Coleus 75 – 100 kg tubers/ha
Snake gourd 3 – 4 kg/ha
Cucumber 0.5 – 0.75 kg/ha
Watermelon 1 – 1.5 kg/ha
Bottle gourd 3 – 4 kg/ha
Pumpkin 1 – 1.5 kg/ha
Ash gourd 0.75 – 1 kg/ha
Brinjal 370 – 500 g/ha
