Farming and Agriculture

How to Cultivate Assam Lemon (Kaji Nemu)

20 March 2024, New Delhi: Assam lemon is one of the most important crops of Assam and other parts of N.E. region. Fruit is widely used for culinary, beverages, industrial and medicinal uses. 

Soil and Climate 

Loamy soil with uniform texture up to a depth of 3 m is ideal for cultivation. It thrives  well in humid sub tropics of the region. 


Assam lemon can be propagated by the following means. 

Stem cutting: The cuttings are usually prepared from fully matured stem. The size of  cutting is 18-20 cm in length with a pencil thickness. The upper cut is made l cm above the  node and lower cut close below the node in slanting manner. The cuttings are planted with a  spacing of 30cm x30cm in a slanting position in the nursery. The bed is prepared with a  mixture of 1: 1: 1 decomposed cow dung, soil and sand, respectively. 

Leaf- bud cutting: Leaf bud cutting should be taken from the branch having healthy  well-developed bud and actively growing leaves. The cuttings consist of a leaf blade and  short piece of the stem measuring 2 cm. 

Air layering: The first step in air layering is to remove completely a strip of bark 3  cm in width at a point 15 cm or more below the tip end scraping the exposed surface to  ensure complete removal of the phloem and cambium is desirable to retard healing. The cut  portion is covered with moss or mud pudding with a mixture of well decomposed cow dung,  soil and sand with a ratio of 1: 1: 1, respectively. Then a piece of polythene sheet 15-20 cm  wide is wrapped carefully around the branch so that the moss and mud is completely covered.  Both end of polythene is tied firmly. 


Size of pit and spacing: Before monsoon, pit size of O.5m x O.5m x 0.5 ml should be  prepared at 3 m apart and refilled the pit with soil and FYM at 1: 1 ratio. 

Time of planting: The time of planting of Assam lemon is May to August. 

Manure and Fertilizer                
4th 20 kg 100g100g100g

This mixture is to be applied in two split doses i.e. during Feb-March and October-  November. 

Intercultural operation 

Weeding should be done frequently at monthly interval, mulching with paddy straw or  black polythene can also be used to control weeds. 


Irrigations are to be given only during dry periods, the first being at planting time,  subsequent irrigations can be given at 15-20 days interval during December to March if  possible. 


Leaf       mining            beetle (Sebathefulvipennis): the       grubs   of         this      insect   feed     on             the  foliage of Assam lemon during new flush. 

Leaf miner: Caterpillars feed on newly emerged leaf tissues forming zigzag shrinking  streak like galleries.

Aphid: Nymphs and adults suck the sap from newly emerged leaves, tender parts  and flowers. 

Monocrotophos@ 2.5 g/ L of water or Dimethoate (Rogor) @ 1.5 ml/L of water  can effectively control these insects. 

Stem borer: Grubs bore and feed on the bark, making tunnels inside the trunk. Control  measure of stem borer is same as discussed in orange. 


Twig blight: Plant exhibits drying of twigs and small branches from growing tip. 

The affected portion should be cut and pasted with Bordeaux paste. Spraying with 

1 % Bordeaux mixture or Copper Oxychloride@ 2.5 g/L found effective against this disease. 

Harvesting and yield  

Assam lemon produces two distinct flowering flush in a year viz. Spring (Feb- March)  and autumn (Sep-Oct) besides sparse flowering round the year. Fruits should be harvested  when they attain full size, develop attractive green to little yellow colour. Fruits are ready for  harvesting during the month of June to July and December to January. From 3rdyear-old tree  about 40-50 fruits may be harvested. 

Also Read: Best Agrolife’s Patented Product ‘Defender’ to Be Available for Indian Farmers From May 2024

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