Hello there my fellow earthlings! I could not believe that we have come to the 10th week already. Just how fast the time flies. If you want to know what we did on the 10th week,read on.
For this week, we were given a briefing about culling/grading.
Culling is one of the most important procedures to be carried out in the nursery to ensure that only the most uniform and vigorous palms that are likely to give the highest yields are planted in the field.
Four rounds of culling are recommended during the nursery period. In addition, a final round of selection should be done just before field planting.
FUNCTIONS
a. To allow only normal healthy seedlings to grow.
b. To remove all runts, abnormal and unproductive seedlings.
c. To supply the best quality palm available for field planting.
Method : Cut the seedlings and bring it to a certain place and the land is recycled.
Culling at the pre-nursery stage is carried out at month 2 and prior to transplanting the main nursery at around month 3 to 4.
This is one of the main advantages of the double stage nursery system where the first stage culling of undesirable palms can be done stringently and quickly over large number of young seedlings.
The main types of undesirable seedlings (should be culled) at this stage are as follows: narrow (grass leaf), rolled leaf, twisted leaf, crinkled leaf, collante and stunted or weak (runts) palms.
Culling in the main nursery should be carried out when the seedlings are 7 months and 9 months old while the fronds of neighbouring palms have not started to overlap and etiolation not set in to mask the runts. The typical characteristics of abnormal seedlings in the main nursery are as follows: –
Erect, flat top, broad pinnae, narrow pinnae, wide internodes, juvenile (slow to pinnate), weak and slow growing (runts), crinkled leaf, collante, chimaera, badly diseased (helminthosporium, curvularia, blast, crown disease) and palms badly damaged by chemicals.
 |
| Chimaera |
 |
Narrow pinnae
|
- From polybag to soil
- To introduce harsh environment to the plants
- To reduce pest
- Increases possibilities so that the plants can survive
CALCULATION EXAMPLE
1 tree = 1 kg 1 sack = 50 kg
1 sack / 50 kg = kg / 143 trees = (143 trees / hectare) x 500 hectare
= 1430 sacks
1 hectare = 100 m x 100 m
= 10000 meter square
 |
| We were discussing and trying to solve the calculation. |
Our day ended with us gathered to gave a farewell to the Vice Rector for her resignation.
Comments
Post a Comment