Republic of the Philippines CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE ISO 9001:2015 TÜV-R 01 100 1934918 San Jose, Pili, Camarines Sur 4418 www.cbsua.edu.ph 1. Give the primary, secondary and micro nutrients needed by the plants. o Primary nutrients Nitrogen – Nitrogen is present in chlorophyll which is important for photosynthesis. Phosphorus – Phosphorus is also an important element that contributes to the Adenosine triphosphate (ATP)system in plants known for storing and transferring energy. Potassium – Potassium plays a major role in the metabolic process and stress management of plants. o Secondary Nutrients Calcium – Calcium plays the role of improving nutrient absorption in plant roots, activates enzymes, and helps in disease resistance in plants. Magnesium – Magnesium is an important component of chlorophyll and is essential for different processes like photosynthesis, respiration and enzyme systems. Sulphur – Sulphur helps in the synthesis of proteins and amino acids. It is also essential for processes like photosynthesis and nitrogen fixation. o Micronutrients: boron (B) copper (Cu) zinc (Zn) molybdenum (Mo) chlorine (Cl) manganese (Mn) iron (Fe) 1 ABE 123 (Plant and Livestock Environmental Control Engineering)