Asian Journal of Soil Science and Plant Nutrition http://journalajsspn.com/index.php/AJSSPN <p style="text-align: justify;"><strong>Asian Journal of Soil Science and Plant Nutrition (ISSN: 2456-9682) </strong>aims to publish high quality papers <a href="/index.php/AJSSPN/general-guideline-for-authors">(Click here for Types of paper)</a> in the field of Soil Science and Plant Nutrition. This journal facilitates the research and wishes to publish papers as long as they are technically correct, scientifically motivated. 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 Asian Journal of Soil Science and Plant Nutrition 2456-9682 The Effect of Microbe Plus and Phosphorus Fertilizers on the Vegetative Growth of Oil Palm (Elaesis guineensis, Jacq.) Seedlings http://journalajsspn.com/index.php/AJSSPN/article/view/30070 <p>The main objective of this study was to improve the growth of oil palm seedlings by using microbe plus to enhance phosphorous availability from rock phosphate under oil palm nursery was evaluated at Oil Palm Research Institute of Ghana, Kade-Kumasi. The study consisted of 16 treatments replicated 3 times in a 4 × 4 factorial experiment arranged in Randomize Complete Block Design. The factors tested were: Phosphate fertilizers (Phosphate only, triple superphosphate, super rock phosphate and Togo rock phosphate) and microbe plus rates (0, 50, 100 and 150%). Data was collected on leaf area, leaf area index and dry matter production. All data obtained were subjected to analysis of variance (ANOVA) using GENSTAT Version 11.1 (2008). The results showed that the P fertilizers and microbe plus applied alone or their interactions had no significant (P=.05) effect on leaf area and leaf area index values, however, dry matter produced was significantly (P=.05) different from each other. TSPMP<sub>150 </sub>treated seedlings produced significantly (P=.05) the highest dry weight; 42% increase over the control (No phosphate and microbe plus). The complementary use of microbe plus with triple superphosphate or Senegal rock phosphate proved to be the best options in terms of the parameters measured than the triple superphosphate. Microbe plus can therefore be used in combination with rock phosphate to improve phosphate availability. Field experiment is suggested to validate the effect of microbe plus and these rock phosphates on the performance of oil palm, whereas, additional studies with different application rates, both at nursery and at the field, are recommended.</p> E. Oppong A. Opoku N. Ewusi-Mensah F. Danso H. O. Tuffour A. Abubakari C. G. Kyere P. Atta Poku Snr ##submission.copyrightStatement## 2020-02-19 2020-02-19 1 8 10.9734/ajsspn/2019/v5i430070 Productivity and Fruit Quality of Manzanello and Picual Olive (Olea europaea L.) Cultivars as Influenced by Spraying Lithovit under Different Irrigation Levels http://journalajsspn.com/index.php/AJSSPN/article/view/30071 <p>Olive tree is the favorable choice to cultivate in desert lands due to high stress tolerance of its tree. Although olive tree tolerates the low availability of water in the soil by means of morphological, physiological and biochemical adaptations, the Productivity and fruit quality of it decrease gradually with increasing water stress. So we have initiated this study to follow up the effect of spraying Lithovit (Ca CO<sub>3</sub> &amp; Mg CO<sub>3</sub>) on the productivity and fruit quality of Picual and Manzanello olives which exposure to different irrigation levels. Four concentrations of Lithovit were sprayed on olive (<em>Olea europaea</em> var. Manzanello) trees (0, 2, 4 and 6 g/L) under three irrigation levels (50, 75 and 100% of evapotranspiration for crop “ETc”) during 2017, 2018 seasons.</p> <p>Spraying Lithovit at 6 g/L recorded the highest values of all fruit physical characteristics of both cultivars in the two seasons. Furthermore, 2 g/L had the highest values of retained fruit percentage of both cultivars which led to increase the yield in the first and second seasons. Concerning irrigation levels, the values of fruit physical characteristics of both cultivars were the lowest values with applying 50% of ETc irrigation level. These values increased with decreasing water stress in the first and second seasons. Concerning retained fruit percentage and yield of Picual and Manzanello, the most promising level of irrigation was 75% of ETc level because it recorded the highest values of yield. Moreover 100% of ETc enhanced the fruit quality.</p> I. M. Dobiea H. E. M. El-Badawy A. A. H. Hegazy S. F. El-Gioushy ##submission.copyrightStatement## 2020-03-16 2020-03-16 1 11 10.9734/ajsspn/2019/v5i430071 Effects of Potassium and Humic Acid on Amelioration of Soil Salinity Hazardous on Pea Plants http://journalajsspn.com/index.php/AJSSPN/article/view/30073 <p>Pots experiment were carried out in green house of National Research Centre, Dokki, Egypt, to study the effect of potassium and humic acid application to minimize the adversely effects of soil salinity on pea plants. Pots were divided into three main groups of soil salinity at levels (2.84, 6.03 and 8.97 dS m<sup>-1</sup>). These main groups were applied potassium sulfate at the rates 50 and 100 kg fed<sup>-1</sup>. Foliar application of humic acid was applied at a rate of 0.2%. Data presented that the application of K<sub>2</sub>SO<sub>4</sub> at a rate of 100 kg fed<sup>-1</sup> with humic acid a foliar spray at a rate of 0.2%, gave the highest values of plant growth parameters such as, Branch No., Leave No., Plant height, leaf area, Shoot fresh and dry weight. In addition to produce high chlorophyll a and b and carotene content as compared to other treatments and control under the different soil salinity levels. Application of K<sub>2</sub>SO<sub>4</sub> (100 kg fed<sup>-1</sup>) with foliar spray of humic acid under high and moderate soil salinity condition increased pod weight, seed weight, seed dry weight over application of 50 kg &nbsp;&nbsp;fed<sup>-1</sup> and control. The highest values of studied chemical constituents in shoots and greens were obtained due to the application of potassium sulfate at100 kg fed<sup>-1</sup> with humic acid. The combined effects of potassium application and foliar spray of humic acid had a positive effect on increasing the ability of pea plant tolerance to soil salinity and increasing of growth and yield production under saline soil conditions.</p> Doaa M. Abo Basha Farid Hellal Saied El-Sayed ##submission.copyrightStatement## 2020-03-19 2020-03-19 1 10 10.9734/ajsspn/2019/v5i430073