پایان نامه رایگان درباره ACT، ISO، Agriculture

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فصل ششم
پیوست
استاندارد های ASAE برای طراحی تسمه و زنجیر
ABSTRACT
DESIGN, FABRICATION AND EVALUATION OF A PNEUMATIC ROW CROP PLANTER EQUIPPED WITH ACTIVE TOOTHED COULTER FOR DIRECT PLANTING OF CORN IN WHEAT RESIDUE
BY:
JALIL NEJADI
Direct planting of corn following wheat is faced with problems in arid and semiarid zones. Soil stiffness as a result of high evaporation and heavy surface residue do not allow furrow openers penetrate desirably in the soil. In this research effects of active toothed coulter on planter penetration in such soils were studied. First a toothed coulter equipped with hydro motor was fabricated and mounted on a conventional pneumatic row-crop planter. Then effects of 3 levels of speed ratio (coulter peripheral speed/tractor forward speed; 1.2, 2, 3) at two previous residue levels (baled-out and non-baled) and two modes of planter attachment (with and without row cleaner) on the planting depth and its uniformity, emergence rate index, amount of surface residue after planting and seed spacing indices (multiple, miss, quality of feed and precision) were investigated. Results showed that planting depth and its uniformity increased with increasing of speed ratio significantly, where at speed ratio of 2, desired planting depth (5 cm) was obtained with maximum uniformity. The emergence rate index increased with increase in speed ratio mainly due to increase in seeding depth at higher speed ratios. Maximum value of emergence rate index was obtained at speed ratio of 2. The active toothed coulter decreased miss and precision indices mainly due to decrease in amount of surface residue which is desirable. Planting with row cleaner into baled-out residue plots at speed ratio of 2 resulted in 31% decrease in miss and 33% decrease in precision indices. The quality of feed index values as high as 70% were obtained at similar conditions, the increase was up to 11% as compared to control.
IN THE NAME OF GOD
DESIGN, FABRICATION AND EVALUATION OF A PNEUMATIC ROW CROP PLANTER EQUIPPED WITH ACTIVE TOOTHED COULTER FOR DIRECT PLANTING OF CORN IN WHEAT RESIDUE
BY
JALIL NEJADI
THESIS
SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES IN PARTIAL FULFILMENT OF THE REQUIRMENTS FOR THE DEGREE OF MASTER OF SCIENCE (MSc)
IN
MECHANIC OF AGRICULTURAL MACHINERY
SHIRAZ UNIVERSITY
SHIRAZ
ISLAMIC REPUBLIC OF IRAN
EVALUATION AND APPROVED BY THE THESIS COMMITTEE AS: EXCELLENT
…………………M. H. RAOUFAT, PHD., PROF. OF MECHANICS OF AGRICULTURAL MACHINERY (SUPERVISOR)
…………………. H. KARPARVARFARD, PHD., ASSISTANT PROF. OF MECHANICS OF AGRICULTURAL MACHINERY
…………………. R. JAFARI, PHD., ASSISTANT PROF. OF MECHANICS OF AGRICULTURAL MACHINERY.
…………………. A. KAZEMAINI, PHD., ASSISTANT PROF. OF Crop Production and plant breeding
JANUARY 2012
1- corn
2 -wheat
3 -Rice
4 – Conventional Tillage
5 – Conventional Tillage
6 – Reduced Tillage
7 – Minimum Tillage
8 – Ridge Tillage
9 – Stripe Tillage
10 – Mulch Tillage
11 – No- Tillage
1- مطالب ذکر شده در 2-2 بر گرفته از (Kachman and Smith, 1995) ، (ISO 7256/1) و (Elmor, 2002) است.
13 – Single Seed Planter
14 – Mean
15 – Standard deviation
16 – Multiple Index
17 – Quality of Feed index
18 – Precision index
19 – Mode
20- purdo
21 – Finger pickup
22 – Vacum planter
– Row cleaner1
– coulter2
25 – Broadcast
26 – Smooth coulter
27 – Notched coulter
28 – Toothed coulter
1- Ripple blade
2- Wave blade
3- Notched blade
1- Overestimate
33 -Mesocotyl
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‌ک
3
19
37
71
105
115

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