限制
环境科学
硝化作用
矿化(土壤科学)
盐度
营养物
遥感
土壤水分
土壤科学
农业工程
氮气
化学
生态学
工程类
地理
生物
机械工程
有机化学
作者
Roberto Ortega,Hugo Poblete
标识
DOI:10.3920/978-90-8686-947-3_18
摘要
Soil mapping is a key element to successfully implement Integrated Nutrient Management (INM) in high value crops. There are several soil mapping techniques, many of which are aided by proximal sensors. The objective of the present work was to evaluate the agronomics behind the mapping results using a gamma radiation sensor in Chilean fruit orchards. Results from over 2,000 ha mapped are presented. The technology has demonstrated its value in determining the most limiting factors in new and established orchards, and the possibility of correcting them in a site-specific manner. The identified limiting factors (LF) have varied widely and have included low pH, P and K deficiencies, excess Na, high salinity, copper toxicity, and low buffer capacity, among others. An important use for the technology is the site-specific estimation of N mineralization as well as the available N, and from them a better N balance and a proper estimation of the Nitrification Inhibitor (NI) rates.
科研通智能强力驱动
Strongly Powered by AbleSci AI