IntroductionPlants grow and reproduce and to do so they need certain resources. Both external and internal resources partly determine the development of plants. Common resources are water, space, and nutrients obtained from the plant's environment or food. They obtain sugar through photosynthesis using water, light, CO2 and other necessary nutrients. Plants require nutrients to build molecules so that the reactions necessary for plant growth, maintenance, and reproduction can occur (Rush, Gladilina, and Condy 2014). These nutrients are usually absorbed by the plant through the roots and leaves. Nitrogen is the most important nutrient for plants, as it is a macronutrient and is needed in large quantities by plants (Rush, Gladilina, and Condy 2014). Since each stage of plant development has its own nutritional and environmental needs, growth and necessary nutrients change throughout the plant's life cycle. So an excessive amount of certain nutrients can have a large effect on the plant (Sims, Pastor, Lee, Dewey 2011). Today, agriculture and the food industry play an important role in the development of our society, as they have become an essential part of our economy. The soil that farmers use to grow their plants contains nutrients that help the plants grow. Since nitrogen is needed in large quantities by the plant, it is used most frequently as a fertilizer. The need for nitrogen depends on the plant. It is considered an organic fertilizer and, if added, too much or too little directly affects crop growth (Whiting, O'Meara, Wilson 2013). In agriculture, nitrogen and phosphorus fertilizers can only be used partially. Having a low level of phosphorus available to the plant is also a limiting factor in plant growth and development. Fertilizer... center of paper... efficiency of formation of nitrogen, phosphorus and potassium in grain. Frontiers of Agriculture in China 5(3):253-61. Rush S., Gladilina E., Condy C., 2014. BIO A02S – Life on land: form, function and interactions – Lab Manuel for winter 2014. Toronto , Ontario: University of Toronto Scarborough Printing Services. 184p.Sims L, Pastor J, Lee T, Dewey B. 2012. Nitrogen, phosphorus, and light effects on growth and biomass and nutrient allocation in wild rice. Oecologia 170(1):65-76.Whiting D., O'Meara C., Wilson C. 2013. Vegetable gardening: soil management and fertilization. [Quoting February 20, 2014]; Available from http://www.ext.colostate.edu/mg/gardennotes/711.html.Zhang Y, Zhou Z, Yang Q. 2013. Nitrogen (N) deposition affects the growth of Pinus massoniana seedlings through effects of the N:P ratio and the modulation of adaptive responses to low P (phosphorus). PLoS One 8(10).