Over N fertilization is a common problem for the winter wheat (Triticum aestivum L.)–summer
maize (Zea mays L.) rotation system in the North China Plain. A field experiment which …

Nitrogen (N) is one of the most limiting factors for maize (Zea mays L.) production worldwide.
Over-fertilization of N may decrease yields and increase NO3− contamination of water …

Efficient use of N fertilizer for corn (Zea mays L.) production is important for maximizing
economic return and minimizing NO3 leaching to groundwater. The objective of this study …

This chapter describes the fundamental principles for nitrogen (N) management, with
emphasis on estimating the rate of N to apply. It reviews and analyzes preplant N …

The ability to increase pools of soil organic C (SOC) in agricultural ecosystems is of interest
both for sequestering atmospheric CO2, and for restoring organic matter pools important to …

Best management practices are recommended for improving fertilizer and soil N uptake
efficiency and reducing N losses to the environment. Few year-round studies quantifying the …

In-season soil nitrate testing is most useful when there is reason to believe, based on field
history, that N availability may be adequate. These reasons may include soil organic matter …

Excessive nitrate leaching from the US Corn Belt has created serious water quality problems
and contributed to the expansion of the hypoxic zone in the Gulf of Mexico. We evaluated the …

The intersection of agricultural drainage and nutrient mobility in the environment has led to
multiscale water quality concerns. This work reviewed and quantitatively analyzed nearly …

A number of soil testing laboratories in the Northeast Region offer testing for soil nitrate to
provide an estimation of the nitrogen supplying capacity of the soil to crop plants. The …