Analyze the provided energy-flow diagram. Calculate energy in A, energy lost in B, name energy in C, and state two aims of calculating feed energy value.

2.5.1 The energy in C is the net energy (energy available for production and maintenance after heat production). Net energy 2.5.2 The function represented by D is production. Production 2.5.3 a) Energy in A Step 1: Gross energy = 1000~kJ Feces energy lost = 150~kJ Step 2: Substitute into formula for energy after feces loss: 1000~kJ - 150~kJ = 850~kJ Energy in A = 850~kJ 850~kJ b) Energy lost in B Step 1: Metabolic energy = 800~kJ Energy to C = 500~kJ Step 2: Substitute into formula for heat production: 800~kJ - 500~kJ = 300~kJ Energy lost in B = 300~kJ 300~kJ 2.5.4 Two aims of calculating the energy value of a feed: 1. To evaluate and compare the nutritive value of different feeds. 2. To formulate balanced and economical rations for animals. (1) Evaluate/compare nutritive value of feeds (2) Formulate balanced rations for animals