I would like to develop a model to predict the flowering capacity or flower number and corm yield of a perennial crop such as tulip, and relationship between environmental factors and plant characteristics.

Thank you for your attention and response

Dear Fulvio

Thank you very much for your comments and articles.

I would like to propose the below links for S.M.Mirhashemi:

Mohammad Kazemi

http://www.google.com/url?sa=t&rct=j&q=%E2%80%9Cimulation+of+plant+growth+and+crop+production%E2%80%9D+pdf&source=web&cd=2&cad=rja&ved=0CDcQFjAB&url=http%3A%2F%2Fmodels.pps.wur.nl%2Fsites%2Fmodels.pps.wur.nl%2Ffiles%2Fsucros8Apr2009.pdf&ei=01d9UqSWEcTWtQbj1IDQCg&usg=AFQjCNFkEETfzJp-jnTnk-oWZxDwvGr-0Q&sig2=UCZvqG9hWCp9jOGKJy6jkg&bvm=bv.56146854,d.Yms

second Link:

http://www.google.com/url?sa=t&rct=j&q=%E2%80%9Cimulation+of+plant+growth+and+crop+production%E2%80%9D+pdf&source=web&cd=9&cad=rja&ved=0CGkQFjAI&url=http%3A%2F%2Fwww.afita.org%2Ffiles%2Fweb_structure%2F20110307102312_40199%2F20110307102312_40199_32.pdf&ei=01d9UqSWEcTWtQbj1IDQCg&usg=AFQjCNFMLpmy2YPiXPs_FbST3b5nQazaKQ&sig2=zkGh8a-wm78b7L2OeuevMw&bvm=bv.56146854,d.Yms

Dear Fulvio

Thanks again for your comments.

Dear Mohammad

Thank you very much for your comments

Dear Fulvio

Words are not enough, still I want to thank you

Mohammad Kazemi

Dear Fulvio and Mohammad

Yes SUCROS manual is one of the best and interesting manual. I've read it. Thanks a lot for your response

There already developed models i.e. DSSAT, APSIM, AQUACROP that you can freely download and calibrate for your crop. There should be good data set for that from site specific experiments

ِDear Asha

Thank you very much for your comments, But I don't want to use the already developed models. I would like to develop an independent model for the perennial plants for predict corm yield

Some of the main factors to be considered for crop modelling are as follows:

(i) Vegetative growth and yield under different fertiliser rates through factorial fertilizer trial

(ii) soil available water holding capacity and soil properties

(iii) The effect of rainfall on vegetative growth and yield.

(iv) growth and yield for various planting material

(v) Growth and yield for various planting density

(vi) yield response to different site

(vii) fertiliser losses through surface runoff and leaching.

Hello,

I share the contributions made by other researchers. I would add that before starting with a model of cultivation you should define what you want to simulate ?, what are the key variables of interest? And how much adjustment does the model require? These points will guide you in which model to choose.

The crop model must be carefully calibrated and validated prior to its application. For this you need two data sets for a correct adjustment.

Greetings.

experimental data/ SOil data/Weather data/Genetic coefficents

The first step is to collect the quality crop, soil data from a field experiment as well as the weather data near by field experiments. These data should be arranged as per crop model input and than calibrate the model first. The model after calibration must be validated with independent data set.

I would suggest reading the books:

• Ecological Modeling: A Common-Sense Approach to Theory and Practice (https://g.co/kgs/Ft5iae)
• Working with Dynamic Crop Models (https://books.google.co.uk/books?id=llVwDwAAQBAJ&newbks=1&newbks_redir=0&lpg=PP1&dq=crop%20modelling%20book%20soil&pg=PP1#v=onepage&q=crop%20modelling%20book%20soil&f=false)

The first one is a very good and straightforward introduction to modeling.

The second is more advanced and gives you examples of modeling steps in R.