Design of Millet Seed-metering Device under Hole-seeding Conditions

Singulation of seeds has been investigated extensively by researchers all over the world and a large number of precision seeding systems with design variations have been developed for different crops. A picking type metering mechanism was developed at CAET, AAU, Godhra, Gujarat, India. The performance of the picking type seed-metering device of a pneumatic planter was investigated under laboratory conditions to optimize the operating parameters for lady's finger seed. The picking of single seed the three operational parameters i.e. hole diameters for the nozzle: 1.0, 1.5, 2.5 and 3.0 mm; forward speed: 0.37, 0.56, 0.83, 1.11 and 1.30 m/s and vacuum pressure: 19.33, 39.32, 43.98, 58.64 and 68.63 kPa were selected for the study. The metering system of the planter was set to place the seed to seed spacing at 300 mm. The response surface methodology (RSM) technique was used to optimize the operational parameters of a precision planter. For optimizing the forward speed, vacuum pressure and nozzle size for developed machine was evaluated by examining the miss index, multiple index, quality of feed index and precision. The data obtained in the experiments were used to develop functions in polynomial form using multiple regression technique. The optimum value was found to be around 0.96 m/s, 36.25 kPa and 2.0 mm of forward speed, vacuum pressure and the holes diameter of nozzle, respectively. The most important variable that governs planting phenomenon is the combination of hole diameter of nozzle and vacuum pressure accounts 89.18 per cent.

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Design and Experimental Study of the General Mechanical Pneumatic Combined Seed Metering Device

Applied Sciences ◽

10.3390/app11167223 ◽

2021 ◽

Vol 11 (16) ◽

pp. 7223

Author(s):

Dengyu Xiong ◽

Mingliang Wu ◽

Wei Xie ◽

Rong Liu ◽

Haifeng Luo

Keyword(s):

High Efficiency ◽

Cone Angle ◽

General Purpose ◽

Optimal Performance ◽

Air Velocity ◽

General Properties ◽

Response Surface Optimization ◽

Damage Rate ◽

Air Blowing ◽

Seed Metering Device

To address the problems of high damage rate, low seeding accuracy, and poor seeding generally in the seeding process, a general-purpose seeding device was designed in this study based on the principle of mechanical pneumatic combined seeding. The air-blowing-type cleaning and seed unloading of the device laid the conditions for precise seeding and flexible seeding. In addition, single-factor experiments were performed on seeds (e.g., soybeans, corn, and rape-seeds) with different particle sizes and shapes to verify the general properties of the seed metering device. A multi-factor response surface optimization experiment was performed by applying soybean seeds as the test object to achieve the optimal performance parameters of the seed metering device. At a seed-clearing air velocity of 16.7 m/s, a seed feeding drum speed of 13.7 r/min, and a hole cone angle of 35.6°, corresponding to the optimal performance index, the qualified index, the replay index, and the missed index reached 97.94%, 0.03%, and 2.03%, respectively. The verification test results are consistent with the optimized ones. As indicated from the results, the seed metering device exhibits good general properties, low damage rate, great precision, and high efficiency; it is capable of meeting general seeding operations of different crop seeds and technically supporting for the reliability and versatility of the seeder.

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Design and Experiment of Swallow line Wheat Precision Seed-metering Device

Advance Journal of Food Science and Technology ◽

10.19026/ajfst.8.1536 ◽

2015 ◽

Vol 8 (6) ◽

pp. 411-416

Author(s):

Xiaoshun Zhao ◽

Xiong Du ◽

Zhikai Ma ◽

Huali Yu ◽

Jinguo Zhang

Keyword(s):

Seed Metering Device

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Accuracy and precision of CT-based endocranial capacity estimations: a comparison with the conventional millet seed method and application to the Minatogawa 1 skull

Anthropological Science ◽

10.1537/ase.070502 ◽

2008 ◽

Vol 116 (1) ◽

pp. 77-85 ◽

Cited By ~ 21

Author(s):

DAISUKE KUBO ◽

REIKO T. KONO ◽

AIKO SASO ◽

SOUICHIRO MIZUSHIMA ◽

GEN SUWA

Keyword(s):

Accuracy And Precision ◽

Millet Seed ◽

Seed Method

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Planting Materials Seed Systems of Finger Millet, Rice and Taro in Jumla, Kaski and Bara Districts of Nepal

Nepal Agriculture Research Journal ◽

10.3126/narj.v6i0.3343 ◽

1970 ◽

Vol 6 ◽

pp. 10-22 ◽

Cited By ~ 2

Author(s):

Bimal K Baniya ◽

Radha K Tiwari ◽

Pashupati Chaudhary ◽

Surendra K Shrestha ◽

Pushpa R Tiwari

Keyword(s):

Seed Production ◽

Finger Millet ◽

Rice Seed ◽

Seed Selection ◽

Seed Supply ◽

Millet Seed ◽

Seed System ◽

Rice Seeds ◽

Planting Materials ◽

Informal Seed Supply

Formal and informal seed supply systems of rice (Jumla, Bara and Kaski), finger millet and taro(Kaski) were studied in three ecosites of Nepal during 1999-2001 to understand the processes ofseed flow, seed production, seed selection and storage systems. A survey was conducted at 48 to96 households. Informal seed supply was the only system in Jumla and Kaski and formal systemexisted only in Bara. The main sources of seed were farmer's own saved seed (67-91%), seedfrom neighbors and relatives. Exchange of germplasm was the main basis of fulfillment fromother sources. All farmers obtained seed from their own village, while farmers introducedmaterials occasionally from outside village. Most of the farmers followed seed selection beforeor after crop harvest. Rice field selection and plant selection based on a fixed set of criteria wasthe common practice. Non lodged plants with more grain per panicle, bold grains, well-maturedand uniform plants, long panicle, true to type, good looking grains, free from diseases andinsects were the main rice seed selection criteria. All farmers from both sites stored rice seeds bylocal methods in the locally available containers. Mor and Mudkothi are the special strawcontainers to store rice seed in Bara. Dhara is a special mud structure used to store rice seeds inJumla. Finger millet seed supply system was mostly similar to that of rice seed system. Ninetyone percent farmers saved seed for their own use; however, many of them changed finger milletseeds lots or varieties regularly for their particular plot. Ears selection during harvest by setcriteria for seed purpose was the common practice. Farmers stored finger millet seed carefully insmall locally available containers and tried their best to maintain the quality of seed duringdifferent stage of seed production. Taro has diverse planting materials: cormels, corms witheyes, suckers and corm with small cormels. Taro planting materials management is totallyinformal and almost 89% farmers saved these materials for their use and replaced them mostlyafter 3 years. Farmers had fixed criteria of corms and cormels selection for planting purpose andfocus and more on disease free. Storage of planting materials was locally by using localmaterials and methods. Understanding of seed system in various crops helps to developconservation strategy.Key words: Seed flow; seed production; seed selection; seed storage; seed systemDOI: 10.3126/narj.v6i0.3343Nepal Agriculture Research Journal Vol.6 2005 pp.39-48

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Potassium and Manganese Fertilization and the Effects on Millet Seed Yield, Seed Quality, and Forage Potential of Residual Stalks

Agricultural Sciences ◽

10.4236/as.2018.97061 ◽

2018 ◽

Vol 09 (07) ◽

pp. 888-900

Author(s):

Maru Kipleting Kering ◽

Cyril Broderick

Keyword(s):

Seed Yield ◽

Seed Quality ◽

Millet Seed

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Biology and survival of broom corn millet (Panicum miliaceum) seed

New Zealand Plant Protection ◽

10.30843/nzpp.2011.64.6013 ◽

2011 ◽

Vol 64 ◽

pp. 142-148 ◽

Cited By ~ 1

Author(s):

T.K. James ◽

A. Rahman ◽

C.R. McGill ◽

P.D. Trivedi

Keyword(s):

Zea Mays ◽

New Zealand ◽

Seed Germination ◽

Sweet Corn ◽

Management Control ◽

Panicum Miliaceum ◽

Wild Type ◽

Temperature Range ◽

Control Options ◽

Millet Seed

The wild type of broom corn millet (Panicum miliaceum) is a serious emerging weed currently prevalent in New Zealand sweet corn (Zea mays) crops This study shows its seed is nearly twice the weight of other common grass weeds and can germinate in the temperature range 1634C with 50 germination at 26C and greatest germination occurring at 31C At 15C it took 8 days for seedlings to emerge but required only 4 days at 25C Seed was able to emerge from depths of up to 170 mm in a range of soils Experiments showed that broom corn millet seed can persist in the soil for longer than 2 years in the field but is killed in silage stack and bales Immersion in stock effluent for up to three months reduced seed germination to less than 40 These characteristics are discussed in relation to herbicide and management control options for this weed

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