Abstract
Availability of plant nutrients in rhizosphere is directly influenced by types of crop grown and land use pattern. The experiment was conducted in Diktel Rupakot Majhuwagadhi Municipality, Khotang, Nepal to assess the soil nutrients dynamics as influenced by different cropping system. Five different cropping systems (Rice – Wheat, Maize – Millet, Maize – Vegetables, Ginger and Cardamom) were selected as treatments and all treatments were replicated for five times for blocking in Randomized Complete Block Design. Soil samples from 0-15 cm depth were collected from each site and evaluated for soil pH, soil organic carbon (SOC), total nitrogen (N), available phosphorus (P), and available potassium (K). All the tested parameters except N were found to be significantly affected by cropping system. Soil in all five cropping systems were found acidic (pH<6.5) in nature with pH ranging from 5.180-6.640. The SOC was recorded highest (3.102%) from Cardamom based system and lowest amount of SOC was observed in Ginger based system. The highest amount of P (32.14 mg/kg) was reported in Maize – Vegetables cropping system and lowest P content (5.72 mg/kg) was recorded from Cardamom based system. P content in Ginger based system (31.51 mg/kg) was statistically at par with that of Rice – Wheat system. The highest K content (306.50 mg/kg) was recorded from Maize – Vegetable cropping system and lowest K content (34.80 mg/kg) was observed in Cardamom based system which is statistically similar to Rice –Wheat (35.70 mg/kg) and Maize –Millet systems (77.20 mg/kg). The result indicated that cropping systems have huge impact on plant nutrient dynamics in soil.
 Int. J. Appl. Sci. Biotechnol. Vol 7(3): 341-346
Highlights
Soil is a most valuable natural resource which is vital to life of all living and non-living things on the planet
The output of statistical analyses was interpreted in terms of NPK level, soil pH and organic carbon content as well as Duncan’s Multiple Range Test (DMRT) test at 5% level of significance
Effects of cropping system on soil nutrients dynamics was evaluated at Khotang, Nepal
Summary
Soil is a most valuable natural resource which is vital to life of all living and non-living things on the planet. All living beings use soil for their shelter, food and other requirements. Soil is the primary medium for plant growth as it provides physical supports by anchorage and supply necessary plant nutrients (Pande, 2008). Soil health is an important parameter to promote the healthy and vigorous growth of the plants. The physical, chemical and biological properties of soil determine status of soil health. Any modification in soil properties within agricultural zone limits the healthy growth of plants and crops as a whole suffer (Dutta & Dutta, 1995). Because agriculture is a soilbased industry that extracts nutrients from the soil, effective and efficient approaches to slowing that removal and returning nutrients to the soil will be required in order to maintain and increase crop productivity and sustain agriculture for the long term (Gruhn et al, 2000). Farming practices mines the soil nutrients from root zone thereby
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