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Drop in 2021 Maha Season paddy yield due Chemical fertilizer ban – Research

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Research reveals that due to the ban on the use of chemical fertilizers during the 2021 Maha Season, the paddy yield per acre for the Maha Season had decreased by 53 percent. A recent survey has revealed that yield per acre has decreased by 53 percent in split paddy cultivation in 2021 Maha Season. 

The Hector Kobbekaduwa Agricultural Training and Research Institute has conducted this survey in the last quarter of 2022 and the first month of 2023 regarding the Impact of the Ban on Chemical Fertilizers in the 2021 Maha Season.

Recently, the five research papers of the survey were carried out by the HEARTI, including handing over five survey papers with this survey to Agriculture Minister Mahinda Amaraweera. The survey has been conducted in relation to the fields of paddy cultivation, vegetable cultivation, potato cultivation and floriculture cultivation.

Accordingly, the survey report also shows that with the ban on chemical fertilizers in the 2021 Maha Season, there has been a setback in all these sectors as well as a reduction in harvests.The reduction in paddy harvest during the 2021 Maha Season is reported to be 53 percent.

According to the survey report, the overall yield reduction is 54 percent under the Major Irrigation, 54 percent under the Mahaweli Area, 53 percent under the minor irrigation system and 51 percent under the rain fed system.

According to the report, the yield of maize dropped by 68 percent, big onion by 52 percent, potato by 52 percent, and chili by 43 percent.

In the 2021 Maha season, vegetable cultivation fell by 57 percent due to the ban on chemical fertilizers. Also, about 86 percent of flower growers have left the floriculture sector.

Accordingly, taking into account the decline in vegetable cultivation, the cultivation of Luffa has decreased by 64 percent, Tomato cultivation by 62 percent, Cabbage cultivation by 61 percent, Bean cultivation by 54 percent, Okra cultivation by 49 percent and Brinjal cultivation by 42 percent.

Due to the ban of chemical fertilizers, the use of organic fertilizers increased by 57 percent. Accordingly, although the use of organic fertilizers in maize cultivation was 05 percent earlier, later it increased to 47 percent.

The Potato crop has dropped from 99 to 95 percent. The survey report shows that the use of organic fertilizers in chili cultivation increased from 32 percent to 67 percent and Big Onion cultivation from 11 percent to 47 percent. However, the Hector Kobbekaduwa Agricultural Training and Research Institute has emphasized that in order to get a successful harvest in farming, chemical fertilizers as well as organic fertilizers should be applied based on the recommendations of the Department of Agriculture.



Tuesday, April 4, 2023 – 01:18

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