I have planted paddy row by row in 7 hectare land.The distance between two rows in 8 inches. The problem I am having is weeding by cono-weeder, because the weeder is of 8 inches dimension and if I use this, there will be damage for the crops.
Please give me solution for weeding through some other weeding device, so that I can save labour cost.
You can use azolla culture to suppress weeds. These also fixes nitrogen when alive and after water is drained it will dry and become a good natural fertiliser.
You can leave culture 2 days after transplantation. It will give good results when FYM is applied.
They spread in the water making thick layer not to leave sunrays to pass below and dont allow any weed to germinate. When water is drained they get dried by and become good natural fertiliser.
I am assuming you are talking about this years paddy and not for next season. If so, weed would have already started to emerge.
I am not against using azolla. To start and maintain azolla culture water logging is necessary. it will dry out when no water is avilable, but by then paddy would have established and weed will not bother paddy. I have not yet tried it. Was initially planing to do it. Not just that azolla ultimately lands in the water bodies completely covering surface.
link below. farmer uses a cycle to de-weed. hindu.com/seta/2010/04/29/st … 601500.htm
You can try using iron fork hoes attached to a motorcycle or some other mechanised device. Using a cycle on 7 hectares is not going to work. You will need a skilled labor to achieve this task.
this will also add little soil on the root of paddy. you will achive good results(roots will not damage under scorching heat)
What I do is when I de-weed, I use the same weed as mulch. it suppress growth of the same weed or others. as some weed grow back just from a hair like root.
Traditionally in Kerala farmers add cashew nut leaf to control weed just after paddy emerges(some add the leafs just after tilling, it also acts as compost and paddy roots find it easy to spread). You can try any flat leaves which stick to the ground. so no weed can emerge. (but 7 hectares is to much I believe).
3.5 months is very late. it needs water logging. by this time you would have drained the water.
Since you have used urea, using azolla makes more dosage of nitrogen and make your paddy grains shed in the field before harvesting.
You can do it for next season.
Azolla seeds are called Azolla culture. In fact they are not seeds. you can get it from nearest KVK or local milk federation or horticulture or agirculture offices. This depends on your local govt scheme.