2024, Vol. 7, Issue 3, Part D

author(s)
G Sivakumar and S Sheik Shalik

abstract
A field experiment was conducted at Experimental Farm, Department of Agronomy, Annamalai University, Annamalai Nagar during the cropping year of 2022, to find out the effect of utilization of bone sludge, by-product of ossein industry as manure with other organic manures viz., bone sludge compost, pressmud compost, poultry manure compost, goat manure compost and farmyard manure on the growth and yield of rice. The results of the experiment revealed that among the different treatments tested, application of bone sludge compost @ 5 t/ha + Pressmud compost @ 5 t/ha along with balance N and K through fertilizers (T₄) excelled all treatments and gave significantly higher grain yield of 6170 kg/ha and benefit-cost ratio of 2.50 when compared to other treatments. Considering the results of the present investigation, it can be concluded that application of bone sludge compost @ 5 t/ha + Pressmud compost @ 5 t/ha along with balance N and K through fertilizers registered highest values in growth parameters, yield attributes, yield of rice and economic returns in rice.