Sathya, S., N.Akila and K.Velmurugan
ICAR- Krishi Vigyan Kendra, VC&RI Campus, Namakkal 637 002, TANUVAS, Tamil Nadu
In Namakkal district, Tamil Nadu, paddy in an area of 10,000 ha under both Rabi &Kharif season. Unbalanced fertilization without soil testing leads to multinutrient deficiency in soil. As per soil test values, soils recorded deficiency in organic carbon (68%) followed by available nitrogen (75%), zinc (86%), boron (29.5) and sulphur (18.6%). Shrinkage in livestock population leads to less application of manures for crop production. Growing green manure crops not only supplies nutrients to soil like livestock manures also conserve all soil properties in better manner, control weeds by its canopy cover over the soil, fixes atmospheric N to the soil and built organic matter during incorporation. Keeping all the points in view, front line demonstrations was conducted in farmers field under rabi season during the year 2021 to overcome the shortage of organic manure and improve the fertility status of soil. The Rice variety white Ponni was taken as the test crop for this FLD programme. Green manures seeds Daincha @ 50 kg/ha was sown, allowed to grow upto 30-45 days after sowing. Then incorporated in the main field and main crop paddy was transplanted and then adopted all nutrient management practices as per soil health cards. Green manuring practice followed by soil test based INM practice (Demo) recorded the highest yield 39.56 q/ha and yield increase over farmers practice was 28%. The demo plot recoded more net rerun Rs.11888/ha with BC of 2.23 (Rs.4460/ha additional income). Farmer can save up to Rs. 12,500/ha by sowing of green manure and recorded appreciable changes in available N status and organic carbon over its initial value.