Some of the top colleges in kerela for bsc honours in agriculture are

• Kerela agriculture university, college of Horticulture Vellanikkara
• Kerela agriculture university, college of forestry Vellanikkara
• Kerela agriculture university, college of agriculture Padanakkad
• Kerela agriculture university
• Mahatma Gandhi University
• Calicut University
• NSS University
• Nehru Arts and Science college

Some of these universities offers placements but the placement ratio and the packages are not that great. As we all know for any subject in basic sciences BSc isn't enough to establish yourself in job sector. So you need to have a MSc until and unless you are trying to get a job in government sector in jobs which only demands a bare graduation degree.

Although you may get a placement after your BSc but for a bright future you should opt for MSc.

I hope my answer helps. All the very best for your future endeavors!