Nitrate levels between or higher than 25 ppm to 30 ppm are sufficient to grow plants in a vegetable garden.Click to see full answer. Beside this, how does nitrate affect plant growth?All nitrates add nitrogen to the soil. Both nitrate ions and ammonium ions can be taken up by plants (some prefer one to the other). These ions provide nitrogen for the plant to make its own amino acids for protein synthesis. Except in very high nitrogen soils, the addition of extra nitrate will stimulate plant growth.Additionally, should large amounts of nitrates be added to soil? How does excess amounts of nitrate affect the growth of a plant and why is this so? Increase in nitrate, like increase in any salt will increase the osmotic concentration of the soil solution. The roots of the plant then have to take up minerals from a more and more concentrated solution. Also question is, is nitrite good for plants? Plants and animals require nitrogen to live and grow. Nitrate and nitrite are two of the nitrogen compounds that are used by plants and animals and eventually return to the air as nitrogen gas. Nitrate and nitrite can also be produced in the body. In nature, plants utilize nitrate as an essential nutrient.How do you increase nitrate levels in soil?Farmers often grow crops such as peas, beans or clover as these crops can form nitrate, as they have nitrogen-fixing bacteria in their roots. This will increase the nitrate content and fertility of the soil. Crop plants will take in the nitrate and use it to make proteins for growth.