@article{MAKHILLERJ20082528269,
    title = {Evaluating Optimum Nitrogen Management Associated with Production and Environmental Load of Farm-Systems in the Dahuofang Reservoir Region},
    journal = {Environmental Research Journal},
    volume = {2},
    number = {5},
    pages = {265-270},
    year = {2008},
    issn = {1994-5396},
    doi = {erj.2008.265.270},
    url = {https://makhillpublications.co/view-article.php?issn=1994-5396&doi=erj.2008.265.270},
    author = {Lei Liang,Ning Hu,Da Tian Jin and},
    keywords = {Agricultural systems,N balance,N Cycling index,N management},
    abstract = {N budgets analysis model offers a new set of tools for evaluating the N cycling in Agricultural systems. Cycling Index (CI) is also a useful tool for estimating optimal N flows in farms and Application Index (AI) as a good indicator for characterizing the N flows in farms. Using these parameters, we analyzed all farm-systems to estimate the optimal N Management for safety N pollution in ground water and maximizing N export in the Dahuofang Reservoir region. It was clearly shown the critical N application rate (chemical fertilizer + manure) was 208.4 kg N ha <SUP>1</SUP> y <SUP>1</SUP>. The critical inter-system input (application N, imported food and feed N and natural supplied N) was 422.5 kg N ha <SUP>1</SUP> y <SUP>1</SUP>.}
    }