Question 2: Develop a complete fertilizer recipe using fertilizer salts for production of tomato in the fruiting stage. Assume that you use reverse osmosis water that does not contain any mineral nutrients. Your stock tank size is 500 liters and injector ratio is 1:100. 2-1. The target element concentrations are listed below. Calculate the amount needed for each nutrient element in the stock tank. Fill out the table below and include the unit (g or kg). Hint: calculate the amount of N required in stock tank first, and then you can ratio out the rest (14 pts). I already partially filled up the table so you may double-check your calculations.

Element target ppm (final dilute solution) Amount needed in stock tank (in g or kg)

N [all N is from nitrate] 180

P 45

K 350 17.5 kg

Ca 200

Mg 60

S 90

Cl 8