Question

Explain why the yield if grain increases when nitrate-containing fertilizer is added.​

Answer 1

Answer:

ers replace the nutrients that crops remove from the soil. Without the addition of fertilizers, crop yiel

Answer 2

The yield of grain increases when nitrate-containing fertilizer is added.​

Because Nitrogen (N) is a major limiting factor for sustainable and profitable crop production.

• However, excessive N application through fertilizers and manures can degrade soil and environmental quality by increasing soil acidification, N leaching, and emissions of ammonia (NH3) and nitrogen oxide (NO, N2O, and NO2) gases, out of which N2O is considered a highly potent greenhouse gas that contributes to global warming.
• Nitrogen application more than a crop’s need can also result in reduced yield. Additional N inputs include dry and wet (snow and rain) depositions from the atmosphere, biological N fixation, and irrigation water.
• Because crops can remove about 40–60% of applied N, the soil residual N (nitrate-N [NO3-N] + ammonium-N [NH4-N]) after crop harvest can be lost to the environment through leaching, denitrification, volatilization, surface runoff, soil erosion, and N2O emissions.
• Long-term application of ammonia-based N fertilizers, such as urea, has increased soil acidity which rendered to soil infertility where crops fail to respond with further application of N fertilizers.