Below is the syllabus of this exam you can check

Subject : Agronomy,Principles of Agronomy,Agricultural Meteorology,Introductory Agricultur,Water Management including Micro irrigation,Weed Management,Farming Systems and Sustainable Agriculture ,Organic and Rainfed farming Subject : Botany,Environmental Science,Principles of genetics,Principles of Plant Breeding,Crop Physiology,Breeding of field and Horticultural crops,Principles of Plant Biotechnology, Principles of Seed Technology, Subject : Soil Science, Introduction to Soil Science,Soil Chemistry, Soil Fertility and Nutrient Management, Manures, Fertilizers and Agrochemicals,Biochemistry, Subject : Plant Pathology, Introductory Plant Pathology,Agricultural Microbiology,Principles of Plant Pathology, Diseases of Field Crops and their Management,Diseases of Horticultural Crops and their Management, Subject : Horticulture,Production Technology of Fruit Crops,Production Technology of Vegetables and Flowers,Production Technology of Spices, Aromatics, Medicinal and Plantation Crops,Post Harvest Management and Value addition of Fruits and Vegetable, Subject : Agricultural Extension,Fundamentals of Rural Sociology and Educational Psychology ,Dimensions of Agricultural Extension,Extension Methodologies for Transfer of Agricultural Technology,Entrepreneurship Development and Communication Skills, Subject : Agricultural Economics,Principles of Agricultural Economics,Production Economics and Farm Management,Agricultural Finance & Co-operation,Agricultural Marketing, Trade and Prices,Agri-Business Management Statistics, Subject : Animal Science & Dairy Science,Livestock Production and Management,Livestock Breeding and Nutrition,Technology of milk and milk Products ,Sheep & Goat production, Subject : Agricultural Entomology,Insect Morphology and Systematic,Insect Ecology, Integrated Pest Management and Beneficial Insects,Crop Pests and Stored Grain Pests and their Management Introductory Nematology, Subject : Agricultural Engineering,Fundamentals of Soil and Water Conservation Engineering,Introduction to Computer and Applications,Farm Power and Machinery, Protected Cultivation and Post harvest Technology

Yes, you can't take admission in B. tech through MCAER CET.

Yes, you can for B.Tech in Agricultural Engineering through MCAER CET. Syllabus for the same is provided below -

Agronomy, Horticulture, Animal Sciences and Dairy Science, Soil Scienc e, Agribusiness Management and Trade, Entrepreneurship Development and Communication Skills

Hope this helps!!!