Land Requirement
Select fertile land with good drainage and irrigation. Previous crop should not be  the different varieties / hybrids of paddy Isolation Space isolation        : 100 m Time isolation          : 25 days (later) Barrier isolation      : Either a distance of 30 m with vegetative barrier or plastic sheet with 2m height	Land preparation

Staggered sowing : Sowing time (Western zone)
Dec – Jan : CORH 3
Restorer (R) line, the male parent should be sown 6 days  (R1), 3 days (R2),  earlier than  A line sowing  and  same day (R3)  on the sowing  of male sterile (A) line, the female parent

CORH 3

CORH 4

Nov- Dec : CORH 4
Restorer (R) line, the male parent should be sown 5 days (R1), earlier than,  A line sowing  and  same day (R2)  on the sowing  of male sterile (A) line, the female parent.

1. Planting ratio        : 8:2 to 10:2 (Female : Male)
2. Border rows          : 4 rows all around the field

1. Between 'A' lines 10 cm ; between 'R' lines 30 cm ; between A and 'R' line 20 cm : within rows 15 cm.

Square planting with single seedling

Transplanted Young Seedling

1. Two paired row @ 2-3 seedlings / hill.

Foliar spray

Spray DAP 2% at boot leaf stage and at 5-10% flowering (or) Spray 0.5% NutriGold (organic growth promoter) at boot leaf stage and at 5-10% flowering (or) Spray 3 % cowpea sprout extract at boot leaf stage and at 5-10% flowering. Panicle exertion Spray GA3 @ 75 g/ha. Spray 40 g of GA3 at 5-10% panicle emergence stage. Spray 35 g  of GA3 at 24 h after first spray. Note: GA3 should be dissolved in 70% Ethyl alcohol.

Supplementary pollination

Rope pulling or shaking the pollen parent with the help of two bamboo sticks at 30-40% of spikelets opening stage. This process is repeated for 3 – 4 times during the day time (10 am to 1 pm) at an interval of 30 min. This has to be repeated for 7 – 10 days during flowering period Harvesting R' line should be harvested first and ensure complete removal from the field followed by harvesting of seed parent Grading For getting better seed quality, the seeds should be size graded using 1.3 mm x 19 mm oblong sieve. The size graded seeds may be upgraded by density grading using gravity separator. Heavy and medium fractions with (90 – 92% recovery) could be selected for seed purpose. Hand cleaning of parental line seeds

Moisture content should be reduced to 12 – 13%

1. Treat with carbendazim @ 2g/kg or halogen mixture (CaOCl2 + CaCO3 mixture at 1:1 ratio) @ 3g /kg of seed.