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Rice transplantation


Transplanting rice is perhaps the most elaborate method of cultivation in the country. As its name implies the seed is sown in one place and the seedlings after they have grown a little are transplanted to another. This is done in order to get higher yields and less weeding. Below are given some of the methods used for rice transplantation with their shortcomings:
Manual transplantation
It is labor intensive and requires 250-350 man-hr per hectare that is 25 % of the total labour requirement of the crop.
It fails to meet the agronomical requirements like plant population per square meter and uniform row and hill spacing, thereby limiting the use of agricultural implements and hand tools for intercultural operations.
Manual transplanter
It consumes more time in transplanting and also involves a lot of human drudgery.
Self propelled Rice Transplanter Machine
It has the problems of poor traction, sinkage and steerability.
It works on puddled soil; it encounters a hard surface at plow pan and a soft puddled soil at the top where it must also have sufficient bearing capacity to prevent sinkage of the float. At the same time the plow pan must not be too deep to provide necessary thrust to propel the transplanter. Both traction and bearing capacity are dependent upon shear strength of the soil. Usually a transplanter would be immobilized either by failure in bearing or traction.
Efficient working of a self-propelled rice transplanter requires a suitable puddled soil condition vis-à-vis optimum depth of puddling, degree of puddling and soil strength of puddled field. High degree of puddling severely affects the mobility
But Long-term experiments suggest that continued puddling for rice destroys soil physical properties and affects both the puddled rice yield and the following crop negatively.
Advantages of puddling:

Reduces soil permeability

Preserves aquatic, anaerobic conditions

Controls weeds, improves water and nutrient availability

Facilitates transplanting
Disadvantages of puddling:

Destroys soil aggregates

Breaks capillary pores

Disperses fine clay particles

Lowers soil strength in the puddled layer

Plough pan (compacted layer) resists root penetration of following crop

Can cause water logging

Forms large clods in finer textured soils preventing seed-soil contact

Forms impermeable clayey layer on the surface in coarser soil
So you have to come up with an alternative method of transplanting rice or suggest methods for correcting the disadvantages of the above mentioned procedures of plantation that require less labour and water without sacrificing productivity. The alternative method should be able free from the shortcomings mentioned above in other methods.

9 comments:

  1. Its a great oppurtunity for the young India to work on problems of grass roots.

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  2. venky28/1/10

    This comment has been removed by a blog administrator.

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  3. Anonymous1/8/10

    thanks helped me do my assignment........lol..

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  4. please provide the procedure of transplantaion of rice seedling

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  5. Anonymous19/6/11

    this major help for my assignment thanks so much

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  6. Anonymous19/6/11

    this was some really good stuff for my assignment thanks alot :)

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  7. Anonymous6/10/12

    thanks a lot as it helped me a lot in completing my assignment........lllllooooolllll

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  8. before transplanting methods

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  9. This information is just what i needed

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