Soil test reporting a nutrient index system*
作者:
A.L. Hatfield,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1972)
卷期:
Volume 3,
issue 5
页码: 425-436
ISSN:0010-3624
年代: 1972
DOI:10.1080/00103627209366397
出版商: Taylor & Francis Group
关键词: fertility index;nutrient levels
数据来源: Taylor
摘要:
An index system of reporting soil test results is suggested which is not confounded with the requirements of a particular crop but is based on each laboratory's evaluation of the test results in relation to the predicted relative sufficiency of each element in a fertile soil. It is suggested that soil test—fertilizer rate correlation adjustments begin after the fact rather than in a precursory manner to influence the results reported. A 0–100 index is proposed as a self explanatory measure and correlated with general crop response as follows: 0–15, nutrient deficiencies visible; 16–50, nutrient deficiencies obscured but plant response probable; 51–100, adequate nutrients available for most crops; 100+, amounts available in excess of present needs.
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