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31
Jul

Seed Grading

1. The main purpose of grading is to separate the seeds according to size and weight for establishing its commercial value.

2. A uniform size and weight of seed is desirable in commercial seed processing.

3. A variety of equipments used for this purpose include; gravity separator, air screen cleaner cum grader, length grader, indented cylinder grader etc.

31
Jul

Power tiller drawn rotary tillers

1. It is a 13-15 HP self propelled machine specifically useful for rice fields and orchards as it can take short turns. 2. It comes with a package of implements like rotavator for puddling, cultivator for land preparation. 3. It takes about 2 hours to puddle one acre and 4 hours for land preparation.
31
Jul

Seed and Grain Cleaning

Seed cleaning:

The main purposes of seed cleaning are to remove the greatest possible amount of impurities, which may be either the seeds of other plant species, broken seeds or inert matter including dirt and insectdebris.

Grain cleaning:

1. Rice crop after threshing contains 8-10% non-grain type contaminants like straw, chaff, dust, impure grains, sand and soil clods.

2. These contaminants need to be removed through cleaning proces

31
Jul

Patella puddler and Patella harrow

Patella puddler : 1. The equipment is animal drawn and suitable for shallow puddling with higher mechanical dispersion of soil. Patella harrow: 1. It is secondary tillage equipment for clod crushing, stubble or trash collection, leveling and smoothening of land surface before seeding.
31
Jul

Screening or Sifting

 

In the Screening or Sifting process, the small size heavier contaminants like sand and soil particles, weed seeds etc are removed by sieving the grain through a smaller size screen (1.4 mm or less sieve opening)

31
Jul

Lugged wheel puddler

It is an animal drawn equipment to break the soil clods near saturation level into soil particles in order to prepare homogenized tilth for mechanized paddy transplanting. The equipment is suitable for shallow puddling with higher mechanical dispersion of soil.
31
Jul

Winnowing

 

 Winnowing is the process of removing lighter contaminants like straw, chaff, dust etc either by dropping the materials from a height against natural wind then fanning manually or by using a mechanical blower.

Guidelines for good winnowing methods:

 1. A polyethylene sheet is spread on the ground.

2. The uncleaned

31
Jul

Rectangular angled blade puddler

1. A seat was designed and fabricated for the operator in rectangular blade puddler, which proved comfortable for the operator. 2. Rectangular blade puddler had less field capacity [0.106 ha/h] than that of the straight rib puddler
31
Jul

Puddlers

Puddlers are five types 1. Straight rib puddlers 2. Rectangular angled blade puddler 3. Lugged wheel puddler 4. Patella puddler 5. Patella harrow
31
Jul

Cultivator (3 fined with sweep shovels)

1. This implement is useful for general tillage in sandy and sandy loam soil and used for interculture of row crops by detaching the seeding attachments.
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