A study on spatial variability of soil nutrient within field

摘要

Reliable information about the spatial variability of soil nutrient is required in order to apply precision agriculture technologies to fertilizer applications. Statistical and geostatistical investigations on soil nutrients including NH_4-N, available potassium and phosphate, organic matter, and total nitrogen within field were carried out through soil grid sampling and chemical analysis in the laboratory. The distributing maps of the soil nutrients were created using ArcView GIS 3.1 software. Preliminary interpretation of the cause of the spatial variability was attempted.