Journal ArticleDOI
Does the crop or the soil indicate how to save nitrogen in maize production? Reviewing the state of the art
TLDR
The potential for nitrogen savings by the use of site-specific N fertilization rates is reviewed and the late stalk nitrate test and the post-harvest soil mineral N test appear to be the most valuable.About:
This article is published in Field Crops Research.The article was published on 2000-05-01. It has received 317 citations till now.read more
Citations
More filters
Book ChapterDOI
Efficiency of Fertilizer Nitrogen in Cereal Production: Retrospects and Prospects
TL;DR: In this article, the authors estimate that 50 to 70% more cereal grain will be required by 2050 to feed 9.3 billion people, which will require increased use of N of similar magnitude if the efficiency with which N is used by the crop is not improved.
Journal ArticleDOI
New spectral indicator assessing the efficiency of crop nitrogen treatment in corn and wheat
Pengfei Chen,Pengfei Chen,Pengfei Chen,D. Haboudane,Nicolas Tremblay,Jihua Wang,Jihua Wang,Philippe Vigneault,Baoguo Li +8 more
TL;DR: In this article, the authors proposed a new spectral index to estimate plant nitrogen (N) concentration, which is a critical component of NNI calculation, using hyperspectral reflectance data collected using a ground-based spectroradiometer on corn and wheat crops at different growth stages from 2005 to 2008.
Journal ArticleDOI
Prospects of improving efficiency of fertiliser nitrogen in Australian agriculture: a review of enhanced efficiency fertilisers
TL;DR: The potential role of enhanced efficiency fertilisers to increase yield in the various agricultural industries and prevent contamination of the environment in Australia is discussed in this paper, which confirms that the efficiency of fertiliser nitrogen can be improved through management practices which increase the crop's ability to compete with loss processes.
Journal ArticleDOI
Strategies to Make Use of Plant Sensors-Based Diagnostic Information for Nitrogen Recommendations
TL;DR: In this paper, a review of near-term operational sensors, handheld and tractor-mounted, for proximal remote measurements for N status determination is presented, where the authors focus on the relationship between sensor readings and optimal N rates, such as critical NSI (nitrogen sufficiency index), INSEY (in-season estimated yield), and sensor-determined CI (chlorophyll index).
References
More filters
Journal ArticleDOI
Comparison of Models for Describing; Corn Yield Response to Nitrogen Fertilizer
M. E. Cerrato,A. M. Blackmer +1 more
TL;DR: In this article, the authors compare and evaluate several models (linear plus plateau, quadratic-plus-plateau (QPL), quadratically-plusplateau plus plateau (QPSP), exponential, and square root) commonly used for describing the response of corn to N fertilizer.
Journal ArticleDOI
Decline in Percentage N of C3 and C4 Crops with Increasing Plant Mass
TL;DR: The % N of all crops declined sharply with increase in W but this decline differed between C3 and C4 crops.
Journal ArticleDOI
A Simple Statistical Procedure for Partitioning Soil Test Correlation Data Into Two Classes1
Robert B. Cate,Larry A. Nelson +1 more
TL;DR: In this article, a simple yet statistically sound method for setting the class limits is proposed, which is to split the data into two groups, using successive tentative critical levels to ascertain that particular critical level which will maximize overall predictive ability (R), with the means of the two groups (classes) as the predictor values.
Journal ArticleDOI
Use of a Chlorophyll Meter to Monitor Nitrogen Status and Schedule Fertigation for Corn
T. M. Blackmer,James S. Schepers +1 more
TL;DR: In this paper, the SPAD 502 chlorophyll meter was used to evaluate the ability of the meter to detect plant N deficiencies in corn by identifying when it would be appropriate to supply N fertilizer in irrigation water.
Related Papers (5)
Use of a Chlorophyll Meter to Monitor Nitrogen Status and Schedule Fertigation for Corn
T. M. Blackmer,James S. Schepers +1 more