Comprehensive information on Nitrogen Use Efficiency for cereal crop production, N use Efficiency Research Methods in Agriculture
 email: bill.raun@okstate.edu

Research Methods in Plant and Soil Sciences
SOIL 5112
spring, odd years

Last update: April 30, 2013
VIRTUAL SAS
  1. Go to virtualsas.okstate.edu
  2. Click the yellow bar on the top of the screen, and select "Run Add-On"
  3. Select the screen size you want, preferably full-screen, and click "Connect"
  4. Enter your OSU user name and password (same as you use for the OSU e-mail system)
  5. A new screen will pop up (the "Remote Desktop"), and SAS 9.3 will be on the left-hand side of the screen.
  6. Double-click on the SAS 9.3 icon, and you now have SAS.
  7. KUNDAN-Virtual SAS Demo
Lecture
Tuesday a.m. at 8:00, Ag Hall 263		 Good Researchers aren't characterized by being smart, but by asking the right question.
Class Goal:  Identify problem, formulate hypothesis, implement treatment structure/experiment and generate hypothetical observations that prove or disprove hypothesis. When is Research in a specific field justified?  The applied versus basic quagmire.

Basic Research (defined)

Applied Research (defined) (Borlaug)
Can society justify basic research when 33,000 people die each day due to starvation?  Who is "society?"
Syllabus

FINAL 2013 KEY

Soil Plant Nutrient Cycling and Environmental Quality, Soil 5813
Soil Plant Nutrient Cycling and Environmental Quality

 Precision Agriculture
 Precision Agriculture

Soil Nutrient Management
Soil Nutrient Management
  CIMMYT, Dr. Borlaug's Wall THE WALL, Dr. Borlaug
  Experimental Method should attempt to remove all sources of variability other than the effects being evaluated within the treatment structure.
T Table

F Computation

Contrast coefficients (equally spaced)

Contrast coefficients (un equally spaced)

 Duncans Table 5%
 Duncans Table 1%		 Assumptions of analysis of variance

1.  Experimental error is random independent and normally distributed about a zero mean with a common variance.

2.  Treatment and environmental effects are additive.

 
 
ON-Line Lectures, 2013

http://pass-ext.adobeconnect.com/soils_jan31/

Feb 05: http://pass-ext.adobeconnect.com/soils_feb05/
 Feb 07: http://pass-ext.adobeconnect.com/soils_feb07/
Feb 12: http://pass-ext.adobeconnect.com/soils_feb12/
Feb 14: http://pass-ext.adobeconnect.com/soils_feb14/
Feb 19: http://pass-ext.adobeconnect.com/soils_feb19/
Feb 21: http://pass-ext.adobeconnect.com/soils_feb21/
Feb 28: http://pass-ext.adobeconnect.com/soils_feb28/

March 05: http://pass-ext.adobeconnect.com/soils_mar05/
March 07: http://pass-ext.adobeconnect.com/soils_mar07/
March 12: http://pass-ext.adobeconnect.com/soils_mar12/
March 14: http://pass-ext.adobeconnect.com/soils_mar14/
March 26: http://pass-ext.adobeconnect.com/soils_mar26/
March 28: http://pass-ext.adobeconnect.com/soils_mar28/

April 02: https://pass-ext.adobeconnect.com/soils_apr02/

April 04: https://pass-ext.adobeconnect.com/soils_apr04/

April 09: https://pass-ext.adobeconnect.com/soils_apr09/

April 11: https://pass-ext.adobeconnect.com/soils_apr11/

April 16: https://pass-ext.adobeconnect.com/soils_apr16/

April 18: https://pass-ext.adobeconnect.com/soils_apr18/

April 23: https://pass-ext.adobeconnect.com/soils_apr23/

April 25: https://pass-ext.adobeconnect.com/soils_apr25/

April 30: https://pass-ext.adobeconnect.com/soils_apr30/

2013 SAS Programs  (now saved as txt files that you can cut and paste into SAS)
AJ_NS.txt
class502.txt

arnallfoliarn_2_2012.sas
 NPKS Wheat 2011-2012.sas

Peter_Graphs
 
Introduction to SAS  (SAS for Beginners) (SAS Beginners, Univ. Georgia)

Checklist for Troubleshooting Non-estimatable Contrasts

Mixed vs GLM (popular press)
Mixed example, Sulu

2012 SAS Programs
SAS 2-14-11
SAS 2-17-11

Output, Log, and Editor Screens (how are they used)
Error messages, Log messages

creating data sets
     infile statement (see program below on combining sites)
     combining sites
data set structure
character variables
missing data (use GLM)
rep-trt in the same cell


how to identify outliers (SD about a mean)
    rules associated with removing outliers

 
Long Term Experiment Design and Analysis
Lahoma 502 Data Base

Lahoma 502 Plot Plan
 
Lahoma 502 (NH4 and NO3 by depth) (lah50288.sas)

Soil-Plant Buffering of Inorganic Nitrogen in Continuous Winter Wheat.  Agron J 1995 87: 827–834


2011 Class Programs

1. Apurba Trial (depth)
2. Sarah, Genotype by Environment Interaction  (class sas program)
3. Jeremiah (complete factorial) (class sas program)
     Discuss treatment 13 vs rest 'contrast'
4. Lecture, 2/15
5. Lecture, 2/17
 
Applied Procedures
    Proc Plot (proc plot; plot y * x = "*";
    Proc Means (var statement)  

proc means min max mean; var yield;


    Proc corr (var statement)
Topics:
1. The "Experimental Method" (defined)
2. The "Scientific Method"
3. Formulation of hypotheses
  3b. 15 Steps to Good Research (Georgetown)
  3c. How to Have a Bad Career in Research
  3d. Advice on Research and Writing  (ASA abstract)
4. By-Plant Corn Studies

5. -When should I block, How should I block?

6. Experimental Design: Implementation
      
       -RCBD vs CRD, and Contrasts

7. Covariance, Autocorrelation 

Collecting Added Data:  When is this useful? 
Why collect Added Data?
 Who is the expert on your particular study?

           Discussion (Testing)
               Univariate, Testing for a Normal Distribution
              Jana Disease Data
               New Algorithm 2007

8. Regression Analysis

9. Applied Statistical Procedures
       -regression versus ANOVA
       -Cate-Nelson and Linear-Plateau

Mean Separation: Calculation of the SED

SED = square root (2*MSE/reps)   = square root (2*s2/reps)

10. Special Topics

Stability Analysis (excel)

(example for agronomic experiments, Use of Stability Analysis for Long-Term Soil Fertility Experiments.  Agron J. 85:159-167)


Sarah Stability Analysis

Stability Analysis (excel)
Magruder excel file
2013 CLASS Presentations

FINAL EXAM: 2013 Tuesday, April 30, 8:00 am

  Name Presentation
April 11 BAJGAIN, RAJEN Temperature Gradient Chamber - model for studying global warming effects
April 11 BARREIRO, ALEXANDRE STEFANI Crop Nutrient Management Calculator
April 11 DHAKAL, KUNDAN

WaterSeeker, a Variable-Rate Irrigation Using Wireless Solar Sensors (#2)

 
 http://www.kickstarter.com/projects/1387729422/plant-link-listen-to-your-plants (Link provided by Andres Patrignani)
April 16 BUSHONG, JACOB TRAVIS Developing a N Soil Test for Rice in Southeast Asia
April 16 DHITAL, SULOCHANA Natural Resources Approach for Sustainable Crop Production for Small Farmers
April 16 FOSTER, ANSERD J Agricultural Management Network
#2 Revised
April 18 LOLLATO, ROMULO PISA Increasing Food Production on Saline Soils
April 18 MEEKS, KEVIN B Overcoming the Global Issue of Salinity
April 18 MILLER, ERIC C Removing Nitrate from Subsurface Drainage Water Using Constructed Welands
April 18 OMARA, PETER Third World Hand Planter
April 23 PITTMAN, JEREMY JOSH

Field Forage Estimator (#2 Revised)
     
April 23 PATRIGNANI, ANDRES Soil Moisture Cloud
April 23 SHEPHERD, LANCE M Irrigation Reclamation
April 23 WILSON, TRACY Crop Database (ideal cover crops)
#2 Revised
April 25 YIMAM, YOHANNES TADESSE Using Available Water Resources to Fight Drought and Poverty in Ethiopia
April 25 Ethan Wyatt 
Developing a Sensor Based Algorithm for Economic Thresholds of 
Leaf Rust (Puccinia triticina L.) on Hard Red Winter Wheat 
(Triticum aestivum L.)
April 25 EDMONDS, DANIEL ETHAN Greenseeker Satellite Calculator

2011 Final Exam

What data should you present?