Hello sir
Light as well as medium heavy soils except purely sandy soils is ideal for aonla cultivation.The tree is well adopted to dry regions and can also be grown in moderate alkaline soils.The worst of soils upto 9.5pHare also good enough to grow amla.Soils with red ,black with wide range of pH can very well accomodate aonla.Prior to planting ,the fields should be deeply ploughed,harrowed and leveled.The pits above 1metre cube should be dug during the month of May-June at appropriate distance and after 15-20 days of exposure to sun are filled with surface soils mixed with 10 to 15 kg of decomposed farm yard manure.If depression takes place in the pits with onset of rain,more soil should be added.
Climate
Aonla plants can be grown in both Tropical and subtropical climates.Annual rainfall of 630mm-80mm is ideal for its growth.The young plants up to the age of 3years should be protected from hot wind during May -June and from frost during winter months.The mature plants can tolerate freezing temperatures as well as a high temperatures up to 46 degree Centigrade .
Varieties
The varieties of aonla recommended for cultivation are Banarasi,chakaiya,francis,NA-4(Krishna)NA-5(kanchan),NA-6,NA-7,NA-10,BSR-1,Anand 1,2,3
Inputs
Number of seedlings for one acre of area should be 200.The field should be Incorporated with 4 tonnes of Farm yard manure.Fertilizers should be given in the ratio of 90:120:48 of NPK along with elemental sulphur 10 kg and micro nutrients 10 kg per acre .15 kg of FYM and 0.5kg of phosphorus should be applied to each pit before planting.Also application of 30 gram of nitrogen each year during September -October up to 10 years for each tree is recommended.
The young plants should be given 15-20kg of well rotten FYM and the mature trees should be fertilized with 1 kg of Super Phosphate and 1-1.5kg of murate of potash.The above fertilizers should be given in two split doses to mature,bearing tree,once during September-October and gain during April-May.After setting of the fruits the plants needs to be irrigated after fertilizer application.
Planting
The pits of 1 sq.mt are to be dug during May -June at a distance of 4.5mt x 4.5mt spacing and should be left for 15-20 days exposing to sunlight .Each pit should be filled with surface soil mixed with 15 kg FYM and 0.5 kg of phosphorus before planting the budded seedlings.Healthy grafts or budded plants are planted during rainy season preferably during the early monsoon in July with square system .
Irrigation
Young plants require watering during summer months at 15 days interval till they are fully established.Watering of bearing plants is advised during summer months at bi weekly interval.After the monsoon rains ,during October-December about 25-30 litres of water per day per tree through drip irrigation should be given.
The schedule can also be done as follows
Plants up to 2 years of age -at 10 days interval
Plants up to 4 years of age -at 15 days interval.
Plants after 4 years of age -at 20 days interval.
Training and Pruning
Leaving only 4-5 well shaped branches with wide angle at about 0.75mt from the ground level,other dead,diseased,week criss cross branches and suckers should be pruned off at the end of December .
Mulching and Intercropping
During summer, the crop should be mulched with paddy straw or wheat straw at the base of the tree upto 15-20 cm from the trunk. Inter crops like green gram, black gram, cow pea and horse gram can be grown upto 8 years.