Green Farming
Bi-monthly Journal
NAAS RATING : 4.38
UGC Approved Jr.No. : 45500
ISSN 0974-0775
GLOBAL IMPACT FACTOR:0.468[2016]
International Journal of Applied Agricultural & Horticultural Sciences
  • 18 February, 2018
Our Mission:
Innovative Eco-Safe Agri-Horticulture Technology for Greener Environment, Global Energy & Food Security.
Vol. 9 (1) : January-February 2018 issue
Green Farming Vol. 9 (1) : 31-35 ; January-February, 2018
Enhancement and maintenance of organic carbon in tropical soils through organic and green manuring
P. SUDHAKARa1*, S.K. HANUMANTHARAYAPPAa2, JALAJA S. KUMAR, a3 and V. SIVAPRASADb4
aRegional Sericultural Research Station, Central Silk Board, Kodathi, Bengaluru - 560 035 (Karnataka),
bCentral Sericultural Research and Training Institute, Central Silk Board, Mysuru - 570 008 (Karnataka)
Designation :  
1Scientist-D/ Joint Director *(sudhakarcsb@rediffmail.com), 2Scientist-C,
3Scientist-D/ Joint Director, 4Director
Subject : Organic Agriculture, Organic Farming and Hi-tech Agriculture
Paper No. : P-7132
Total Pages : 5
Received : 08 January 2018
Revised accepted : 26 January 2018
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Citation :

P. SUDHAKAR, S.K. HANUMANTHARAYAPPA, JALAJA S. KUMAR and V. SIVAPRASAD. 2018. Enhancement and maintenance of organic carbon in tropical soils through organic and green manuring. Green Farming  Vol. 9 (1) : 31-35  ;  January-February, 2018

ABSTRACT
Increased rate of decomposition and oxidation of organic carbon (OC) is well established under ploughing practices in the Tropical climate of South India resulting in low organic carbon. Efficient farming maintenance with quality production optimum organic carbon (>0.6%) in soil is most essential. The cost-effective ways to enhance organic carbon content without compromising the yield levels are best suitable. However, there is a direct correlation among organic carbon content and rainfall related to length of growing period (LGP). Based on which Karnataka soils have been categorised into three groups such as i). Low in OC (<0.50%) in 650mm rainfall area with 90-150 days LGP, ii). Medium OC (>0.50-0.75%) in 650-1000mm rainfall with 150-250 LGP and iii). High OC (>0.75%) in 1000-3000mm rainfall with more than 250 LGP. However, 48% land area of Karnataka soils needs improvement in OC for high productivity with economic inputs. Hence, efforts should be made to build up OC to make farming successful with minimal inputs under the escalating cost of farming in general and fertilizer in particular. Hence, presently an attempt is made to study the OC improvement in soils under varied farming techniques with continuous organic farming and intercropping. It was observed that the soils with forage and pulses as intercrops (being leguminous in nature) in combination with organic as green manuring practices with 50% reduced chemical fertilizers inputs under paired row system of mulberry [(60x90) x150cm] gave better quality mulberry output and improved soil health in addition to OC improvement at a faster rate compared to other techniques without hampering other soil quality characters.
Key words :
Crop production, Green manuring, Inter cropping, Leaf production, Mulberry, Organic carbon, Organic farming.