يا ﻪﻘﻄﻨﻣ - conference.khuisf.ac.ir

1 ( . 27-28 1389 .. 2 . * 1 . 1 2 . * .. : .. ) (S3 S3C .. : .. " " .. 34 32 15 32 19 50 53 50 . 58 . 321/5 . 11/8 . 1:25000 . 15 150 .. 14 .. Typic Calcixerepts Fluventic Haploxerepts Typic Haploxerepts calcic Haploxerepts . 12 14 ) .(Soil Survey Staff, 2006 .. ) ( . 27-28 1389 . : .. ) (100 .. ) (LI .. ) 1 ( ) 2 ( : . B C . LI A .. ) (1 . 100 100 . A B C . LI Rmin .. ) (2 . 100 100 100 . B A C :.. :Rmin . ) (1 .. ) :(1 .. =S1 75-100 . =S2 50-75 . =S3 25-50 . =N 0-25 . 1 2 . 4 .. 3 4 1 2 ) 1376 . 1991 .(1991 . CR CI if 25 CI ) (3 . CR CI if CI 25 ) (4 . :CI . :CR .. ) ( . 27-28 1389 .. ) (S3 S3C .. -1 .. -2 .. -3 ..1 .1378 ..2 .1376 .. 1015 . 100 .. 3. Chinene, 1991. The Zimbian land evaluation system (ZLES). Soil use and management. 7: 21-30.. 4. Soil Survey Staff, 2006. Keys to Soil Taxonomy.)

2 Tenth Edition, United States Department of Agriculture . and Natural Resources Conservation Service.. 5. Sys C., Van Ranst E. and Debaveye J., 1991. Land evaluation , Part 1. International Training Center for . Postgraduate Soil Scientists. Chent University, Ghent.. ( ) . 1389 27-28. Qualitative land suitability evaluation for maize in Shahrekord area Sepideh Etedali1* and Javad Givi2. 1 2. student and associated professor, Department of Ssoil Science, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran. *E-mail : sepidehetedali @ Abstract Considering incorrect land use on one hand and ever-increasing need for increasing yield per surface area unit, on other hand, importance of optimal land utilization is perceived. In this regards, crop specific land suitability evaluation is essential.

3 The purpose of this research was qualitative land suitability evaluation for maize in Shahrekord area. This evaluation was carried out in three stages: (1) collection of climatic, topographic, hydrologic and soil data, (2) determination of maize growth requirements and (3) comparison between the land characteristics and the maize growth requirements. In the last stage, suitability classes and subclasses were obtained, using simple limitation and parametric methods. The results showed that all of the land units are marginally suitable for irrigated maize and are classified as S3C. The most important limitation for maize production in the study area is relative humidity of its developing stage. Keywords: Qualitative land suitability evaluation , Simple limitation method, Parametric method, Storie formula, Square root formula, Maiz