All three statements are correct, reflecting the multifaceted nature of nitrogen compounds in agriculture and livestock management. Agricultural soils, particularly through fertilization and microbial processes, can emit nitrogen oxides (NOx) into the atmosphere, which contribute to air pollution and climate change. Cattle, due to their digestive processes, produce ammonia (NH3) as a by-product that can volatilize into the environment, contributing to atmospheric nitrogen load. Similarly, the poultry industry generates reactive nitrogen compounds, especially through manure management and feed conversion, exacerbating nitrogen pollution. Understanding these emissions is crucial for developing sustainable agricultural practices and mitigating environmental impacts, a key focus area in UPSC's environmental studies.