**DESCRIPTION OF COURSES**

**AG 602 EXPERIMENTAL TECHNIQUES IN AGRONOMY (2L+2P) II**

**Objective**

To teach methodology of planning, layout, data recording, analysis, interpretation and report writing of agronomic experiments

**Theory**

UNIT I

Historical aspects, principles and practices of field experimentation

UNIT II

Identification of research problem and preparation of research project proposal. Presentation of data and report writing.

UNIT III

Planning of experiments, recording of data - before layout of experiment, during crop growth and after harvest. Selection of experimental design, layout of experiment, number of treatments / replications, plot size, border effect etc. Techniques for increasing the precision for an experiment.

UNIT IV

Interpretation of data from weed control, irrigation, fertilizer and cropping system experiments. Interactions in factorial experiments.

UNIT V

Contrast analysis, pooled analysis and data transformation. Evaluation of direct, residual and cumulative effects of treatments.

UNIT VI

Correlation and regression analysis, and their application. Energetics and economic analysis.

UNIT VII

Analysis of data of typical agronomic experiments. Nutrient and water balance sheets. Statistical softwares and their application.

**Practicals**

Practical considerations in field experimentation. Practical use of softwares in agricultural research and analysis of data. Analysis of data of field experiments. Use of excel in data analysis. Statistical analysis of data using MSTATC. Calculation and interpretation of interaction of factorial experiments. Calculation of direct, residual and cumulative effects of treatments in cropping systems. Exercise on confounding designs. Exercise on contrast analysis. Exercise on data transformation. Exercise on missing plot analysis. Exercise on pooled analysis of data over years/locations. Exercise on linear regression equation. Exercise on quadratic regression equation. Exercise on computation of energy requirement in agricultural production. Economic analysis of field crop production. Exercise on determination of optimum economic dose of fertilizers. Exercises on interpretation of data from different types of experiments.

**Suggested Readings**

- Clewer, A.G. and Scarisbrick, D.H. 2001.
*Practical Statistics and Experimental Design for Plant and Crop Science*. John Wiley and Sons Ltd. West Sussex, England - Cochran, W.G. and Cox, G.M. 1992.
*Experimental Designs*. John Wiley and Sons, Inc. Toranto, New York, USA. - Darmaraju Raghavarao. 1983.
*Statistical Techniques in Agricultural and Biological Research*. Oxford and IBH Publishing Co. New Delhi. - Das, N.R. 2008.
*Agronomic Research Management*. Agrotech Publishing Academy, Udaipur. - Gomez, K.A. and Gomez, A.A. 1984.
*Statistical Procedures for Agricultural Research*. John Wiley and Sons, Singapore. - Rangaswamy, R.A. 2006.
*Text Book of Agricultural Statistics*. New Age International (P) Limited, New Delhi.