Sesame is an important oilseed crop grown by many farmers in India because it requires less water and fits well in different cropping systems. Proper seed rate and correct spacing play a major role in getting good plant growth and higher yield in sesame. Many farmers face low yield problems mainly due to overcrowding or uneven plant population, which can be easily avoided by following the recommended seed rate and spacing.
Seed rate means the quantity of seed required to sow one hectare of land. For sesame, the seed rate depends on the method of sowing and the variety used. In general, a seed rate of 3 to 4 kilograms per hectare is sufficient when sowing is done in lines using a seed drill or by hand dibbling. When broadcasting is followed, the seed rate increases to about 4 to 5 kilograms per hectare because seed distribution is not uniform and thinning becomes difficult.
Using the correct seed rate is important because sesame seeds are very small. If too much seed is used, plants grow very close to each other, leading to competition for nutrients, water, and sunlight. Overcrowded plants become weak, grow taller, and produce fewer capsules. On the other hand, very low seed rate results in gaps in the field and poor yield.
Spacing is equally important for sesame crop. Proper spacing allows good air circulation, better light penetration, and healthy root development. For line sowing, the recommended row-to-row spacing is usually 30 to 45 centimeters, depending on soil fertility and variety. In fertile soils with good moisture, wider spacing of about 45 centimeters is preferred, while in medium soils, 30 centimeters spacing works well.
Plant-to-plant spacing within the row should be around 10 to 15 centimeters. This spacing ensures that each plant gets enough space to grow and produce more branches and capsules. If plants are too close, branching is reduced and pest and disease problems may increase due to poor air flow.
After germination, thinning is an important operation in sesame. Since seeds are small, multiple seedlings often emerge at one place. Thinning should be done 10 to 15 days after sowing to maintain the correct plant-to-plant spacing. Removing excess plants at this stage helps the remaining plants grow stronger and healthier.
The method of sowing also affects spacing. Line sowing is always better than broadcasting because it allows proper spacing, easy intercultural operations, and better weed control. It also helps in uniform fertilizer application and spraying. Broadcasting should be avoided if possible, as it leads to uneven plant population and lower yield.
Soil type and season also influence spacing. In rainfed conditions or light soils, slightly closer spacing helps maintain adequate plant population. In irrigated conditions or fertile soils, wider spacing supports better branching and higher yield.
In conclusion, following the correct seed rate and spacing is a simple but very important practice in sesame cultivation. Using 3 to 4 kg seed per hectare with proper line sowing, maintaining 30 to 45 cm row spacing and 10 to 15 cm plant spacing, and timely thinning will help farmers achieve healthy crop growth, better capsule formation, and improved sesame yield.
