International Journal of Plant & Soil Science <p style="text-align: justify;"><strong>International Journal of Plant &amp; Soil Science (2320-7035)</strong>&nbsp;aims to publish high quality papers (<a href="/index.php/IJPSS/general-guideline-for-authors">Click here for Types of paper</a>) in all areas of ‘Plant &amp; Soil Science research’. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US International Journal of Plant & Soil Science 2320-7035 Effect of Increasing Elevation of Lowland Coastal Saline Soils of Sundarbans (India) on Soil Salinity and Its Seasonal Variation <p>The delta region of the river Ganges spreads over India (West Bengal) and Bangladesh is popularly known as Sundarbans. Crop productivity of the region is very poor. Agricultural lands of the region are mostly saline and low-lying with drainage congestion due to presence of brackish groundwater table at shallow depth and flat topography. In recent years, improvement in productivity of these lands was witnessed by farmers when the elevation of lowlands was increased through land shaping. In the present study changes in the salinity status of soil were due to raise of land elevation through land shaping was investigated for two years and 3 seasons (winter, summer and late summer). It was found that there was a considerable decrease in soil salinity due to increase in elevation of lowlands through land shaping. The salinity of original lowlands was about 200% higher than the raised lands or uplands made through land shaping. Salinity of rhizosphere soil decreased with depth and there was a strong seasonal variation of soil salinity. At all soil depths soil salinity increased as the dry season progressed from winter to late summer through summer and soil salinity was highest in the surface (0-10 cm). The depth to groundwater table and the groundwater salinity also showed strong seasonal variation and were maximum in late summer season. The drainage condition of soil improved with increasing in land elevation.</p> Tonmoy Sengupta B. K. Bandyopadhyay Sudipta Tripathi ##submission.copyrightStatement## 2019-09-09 2019-09-09 1 10 10.9734/ijpss/2019/v29i530152 Economic Assessment of Napier Grass Production Using Different Fertilizer Combinations under Smallholder Farming Conditions in the Central Highlands of Kenya <p><strong>Aims: </strong>The objective of the study was to evaluate the cost-effectiveness of using different fertilizer combinations to improve Napier grass production within the smallholder farms.</p> <p><strong>Study Design:</strong> The experimental design was a Randomised Complete Block Design (RCBD) with three replicates per treatment. The treatments were: Di-Ammonium Phosphate (DAP); rabbit (<em>Oryctolagus cuniculus</em>) manure; rabbit manure plus rabbit urine; DAP plus Calcium Ammonium Nitrate (CAN); DAP plus rabbit urine; Control; and Conventional method.</p> <p><strong>Place and Duration of Study:</strong> The study was done in Embu County, Kenya from March 2015 to January 2016.</p> <p><strong>Methodology:</strong> The economic analysis to determine the most cost-effective fertilizer was done using gross margins and cost-benefit ratios approach.</p> <p><strong>Results:</strong> Rabbit manure plus urine had the highest cost of production averages at US$.154 8.13 per year at p&lt;0.05 while the conventional method was US$ 494.59 at p&lt;0.05. The study revealed that the most cost-effective fertilizer in Embu County was DAP plus rabbit urine treatment under ‘‘<em>Tumbukiza</em>’’ pits.</p> <p><strong>Conclusion:</strong> The projections are that by the end of the second cropping year, the treatment top-dressed with either rabbit urine or CAN would be having higher gross margins since the initial cost would have been recovered. Farmers in Embu County are encouraged to integrate the use of both organic and inorganic fertilizers to achieve high production in a cost-effective way.</p> Bridget W. Ndwiga Esther E. Arunga Felix K. Ngetich ##submission.copyrightStatement## 2019-09-13 2019-09-13 1 6 10.9734/ijpss/2019/v29i530153