Soil Fertility, Erosion, Runoff and Crop Productivity Affected by Different Farming Systems

Authors
U. Sharma 1
M. Datta 2
V. Sharma 3
1 Centre for Natural Resources Management, V.P.O. Tarore, District Jammu-181133, India
2 ICAR Research Complex for NEH Region, Lembuchhera, Tripura, India
3 S.K. University of Agricultural Sciences & Technology, Chatha, Jammu-180009, India
Abstract
A field study was undertaken with four farming systems (FS) such as; grasses and fodders, agro-forestry, agriculture (new farming systems) and shifting cultivation (old practice), to investigate the effect of land use on the soil properties, erosion and crop productivity on a loamy acidic Alfisol. Besides crops, the livestock were also kept and their dropping were incorporated in the respective watersheds. Soil sampling was done during first week of May every year from 0-20 cm depth, with auger. A significant increase in soil organic carbon (SOC) up to 0.99%, available P up to 17.2 mg kg-1, K up to 170 mg kg-1 of soil, pH up to 6.3, was found after 10 years of study over their initial values of 0.46%, 2.7 kg-1, 105 kg-1 of soil and 4.9, respectively, in the new FS. In shifting cultivation, K status increased up to three years of study and then subsequently decreased. Diethylen etriamine penta acetic acid (DTPA) extractable Zn, Mn, Fe and Cu decreased in all the farming systems. Exchangeable Al content decreased from 117 to 37 mg kg-1 of soil, in new FS. The study showed that about 91.1% to 99.1% rainwater could be retained depending on the vegetation cover in new FS, as against 66.3% in the shifting cultivation. New FS ameliorated the soil by decreasing exchangeable Al and Fe and enhancing soil pH. Soil and nutrient losses were significantly less and crop productivity higher in new FS compared to shifting cultivation.
Keywords
Farming systems
Shifting cultivation
Soil erosion
Soil fertility
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ECOPERSIA
Volume 2, Issue 3 - Serial Number 9
September 2014
Pages 629-650