Study of The effects of different seedbed preparation and planting methods on yield , soil organic matter , pests and weeds in corn , wheat and seed clover rotation in Khuzestan .
2005
Barzegari, Mohammad | Eslami Zadeh, Rahim | Shahr Banu Nezhad, Mas`ud | Salim Pur, Sa`ied | Qasemi Ranjbar, Ja`far | Barz Kar, Maryam | Reza Qarib, Mansur | Sane`i Nezhad, A`li Akbar
This experiment was conducted in 1380 and 1384 to evaluate the effect of minimum tillage and rotation on crop yield, increasing organic mater, improvement of physical properties of soil and fluctuation of pests and weeds population. The experimental design was a randomized complete block with seven treatments, and three replications. Treatments included minimum tillage, planting methods, and planting machinery. Plots were planted twice with corn and wheat and once with clover. wheat planting treatment, included : planting two rows of wheat on beds with stubbles from previous crop and minimum tillage, planting wheat with Hasia row planter without tillage planting wheat with Hamedan Barzegar row planter without tillage planting wheat in two rows after disking and making furrows , planting wheat in two rows after rotivator and making furrows, broadcasting seeding and furrow making , standard treatment consisting disking , mold board plow, disking, seed broad casting , disking and making borders. Corn planting treatment included: one row of corn on crop residue without tillage, irrigation and corn planting, irrigation disking, making furrow and corn planting, irrigation, furrow making and corn planting, irrigation, rotivator, furrow, making and corn planting, burning crop residue rotivator, furrow making and corn planting .Complete tillage consisting mold board plow, disking, furrow making and corn planting as standards treatment. Clover Treatment Were the same as wheat treatments. Plots were 7 m wide and 30 m long. Crop was harvested from 6 m2area of each plot. Results showed that in the first year, effect of treatment were significant on number of spikes , number of seeds per spike , 1000 seed weight and biological yield , seed yield and spike length in the second year, There was no significant difference among treatments for above mentioned parameters. For corn, effect of treatments was significant on seed yield, number of seed rows and number of seeds per row. For clover there was significant difference among Treatment for seed yield , biological yield and number of pods per m2.There was no significant difference among Treatments for clover seed pod weevil (protapion trifolii) and corn stem borer (Sesamia spp) in wheat and corn . Purple nut sedge density was different in different treatment. Plots of G (48.6 plant /m2) and E treatments (2.6 plant / m2) had the highest and lowest infestation of Purple nut sedge respectively.
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