Soil analysis gis-based fertility assessment and mapping of agricultural research station, Pakhribas, Dhankuta, Nepal

Abstract

<p>Soil fertility evaluation has been considered as a most effective tool for sustainable planning of a particular region. This study was conducted to determine the soil fertility status of the Agricultural Research Station, Pakhribas, Dhankuta, Nepal. The total 60 soil samples were collected randomly at a depth of 0-20 cm by using the soil sampling auger. For identification of soil sampling points A GPS device was used. The collected samples were analyzed for their texture, pH, OM, N, P<sub>2</sub>O<sub>5</sub>, K<sub>2</sub>O, Ca, Mg, S, B, Fe, Zn, Cu and Mn status following standard methods in the laboratory of Soil Science Division, Khumaltar. The Arc-GIS 10.1 software was used for soil fertility maps preparation. The observed data revealed that soil was dark yellowish brown (10YR 4/4) and yellowish brown (10YR 5/6) in colour, and single grained, granular and sub-angular blocky in structure. The sand, silt and clay content were 56.61±0.97%, 27.62±0.56% and 15.77±0.58%, respectively and categorized as loam, sandy loam and sandy clay loam in texture. The soil was very acidic in pH (4.66±0.07) and very low in available sulphur (0.53±0.11mg/kg), available boron (0.24±0.07mg/kg). The organic matter (1.34±0.07%), total nitrogen (0.09±0.003mg/kg), available calcium (605.70±31.40mg/kg), available magnesium (55.96±4.67mg/kg) and available zinc (0.54±0.22mg/kg) were low in status. Similarly, available potassium (115.98±9.19 mg/kg) and available copper (1.13±0.09 mg/kg) were medium in status. Furthermore, available manganese (36.31±2.82mg/kg) was high, whereas available phosphorus (105.07±9.89 mg/kg) and available iron (55.80±8.89 mg/kg) were very high in status. The soil fertility management practice should be adopted based on the determined status in the field for the sustainable production of crops. The future research strategy should be built based on the soil fertility status of the research farm.</p>

Changes in the Physicochemical Parameters of Chestnut Soils in Western Kazakhstan Under the Influence of the Grazing Technologies

“…Overgrazing may lead to soil degradation and loss of the fertile topsoil, especially in the case of little rainfall and significant evaporation (Khadka et al, 2019). It was confirmed by the results of the research studies.…”

“…Another fundamental property of the soil is its density. In contrast to the soil structure, which is a well-known regulator of the physical conditions in it, and has only an indirect effect on plants, the density of the soil directly influences the processes of their life activity (Khadka et al, 2019).…”

Multi-Locations Evaluation of Garden Pea Genotypes for Pod Characters and Yield

“…Minimum temperatures ranges from 2.0 to 9.0°C and maximum temperature ranges from 15.7 to 23.5°C. The soil texture at Dhankuta consisted of 56.61% sand, 27.62% silt and 15.77% clay and is categorized as loamy to sandy loam type (Khadka et al, 2019).…”