Optimal nitrogen (N) management is essential for profitable vegetable crop production and
to minimize N losses to the environment that are a consequence of an excessive N supply …

On historical timescales, enhanced availability of water and nitrogen has been a major
driver of improved crop yield worldwide. The interaction between water and nitrogen has …

Remote sensing is a valuable tool for reducing the environmental impact of agricultural
practices by detecting crop nitrogen (N) and water status for site-specific N fertilization and …

UAV-based multispectral vegetation indices are often used to assess crop performance and
water consumptive use. However, their ability to assess the interaction between water …

Nitrogen and water are two key factors for wheat production due to their major roles in plant
growth and development, photosynthesis, yield, and grain protein content. Plant uptake of …

Remote sensing (RS) offers great possibilities to acquire data for early determination of crop
performance, which is essential for water and nitrogen (N) management. The objective of …

Precision Agriculture (PA) as a conceptual framework for farming operations responds to the
need to manage inter-field and intra-field variability on farms, within watersheds, regionally …

Core Ideas Nitrogen use efficiency is low in surface‐irrigated cotton. Canopy reflectance can
guide in‐season N management. Deep percolation of rain and irrigation is associated with …

Spatial crop nitrogen (N) management has advanced over the years by using canopy
reflectance data to make N recommendations. But the value of an automated system for …

Active radiometric reflectance is useful to determine plant characteristics in field conditions.
However, the physics of silicone diode-based sensing are temperature sensitive, where a …