Agricultural Science (ISSN 2690-5396 e-ISSN 2690-4799) <p><em>Agricultural Science</em>&nbsp;(ISSN 2690-5396 e-ISSN 2690-4799) is an international, double-blind peer-reviewed, open-access journal, published by the IDEAS SPREAD&nbsp;in United States. It publishes original research, applied, and educational articles in all areas of agricultural science.<br> <em>Agricultural Science</em> is striving to provide the best platform for researchers and scholars worldwide to exchange their latest findings. Authors are encouraged to submit complete, unpublished, original works that are not under review in any other journals. The journal is published in both print and online versions, and the online version is available for free.</p> IDEAS SPREAD INC en-US Agricultural Science (ISSN 2690-5396 e-ISSN 2690-4799) 2690-5396 <p>Copyright for this article is retained by the author(s), with first publication rights granted to the journal.<br>This is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (</p> Interaction Between Two Types of Earthworm and Ageratum on Soil Physicochemical Properties <p>Earthworms are one of the most important soil organisms in tropical ecosystem as they influence mineralogical, structural and microbial composition of soil. The study investigated the effect of interaction between two Nigerian earthworms <em>Eudrilus Eugeniae</em> and <em>Irridodrilus </em>sp and Ageratum species (AG) on soil physicochemical properties in potted experiment. The treatment consisted of 1000g subsoil treated with ageratum (AG); Ageratum + soil inoculated with <em>Eudrilus Eugeniae</em> (AE), Ageratum + soil inoculated with <em>Irridodrilus </em>sp (AI) and control soil not treated (CO). The results of the study showed remarkable differences between the treatments in soil physicochemical properties. The pots inoculated with <em>Eudrilus Eugeniae</em> (AE) relative to other treatments produced high quality ion exchange as evidence from the high (CEC) recorded, enhanced soil aggregation 73% compared to 52% recorded in AI, stabilization of soil aggregates and enhanced availability of nutrient elements by 150% compared to 120% observed in AI. High level of soil pH (9.15) was recorded in AE. AG induced 62% increase in soil erodibility and only 9% increase in availability of soil nutrients. AG was found to be toxic particularly to <em>Irridodrilus</em> whose percentage survival was 0% relative to 67% of <em>Eudrilus Eugeniae</em> whose weight loss was 27%. Ageratum is a bio-pesticide and bio-fertilizer of which its production is simple and cost effective and the efficacy for soil management will require the presence of active soil organisms like earthworms to process Ageratum adequately as was found in this study. The primary materials used in this study are abundantly available and within the reach of farmers. The production and application is eco-friendly, promotes sustainable soil productivity, soil conservation and environmental health. This technology will discourage the use of chemical pesticides and fertilizers in the study area if well integrated in crop production activities.</p> Nweke I. A. ##submission.copyrightStatement## 2020-03-25 2020-03-25 2 2 p1 p1 10.30560/as.v2n2p1 Soil Testing A Panacea to Crop Yield and Agricultural Sustainability – A Case for Farmers of South Eastern, Nigeria <p class="text"><span lang="EN-US">Increasing human population is closely related with the increasing demand of food and pressure on available land with the rising demand on fertilizer that has not been sustainable at the farmer’s level. This causes soil fertility decline, nutrient imbalance and low residual effect which are constraint affecting agricultural production in south eastern soils of Nigeria in particular and to large extent in tropical environment. Land available to be used for intensive crop production activities is limited and this demand for adequate soil testing that will x-ray the fertility status of the soil before crop planting. The characteristics and amount of nutrient elements of a soil and soil biodiversity is influenced by climatic conditions, erosion/leaching, drought, cultivation history/land use system, cropping history, kinds of pesticides/herbicides applied, type and methods of inorganic and organic fertilizer applied. Soil testing quantifies the total value of plant nutrient elements available in a sampled soil that will directly promote crop growth and yield. Due to its biophysical, biochemical, biological and physiochemical results, soil testing when appropriately interpreted and applied may be used effectively to promote sustainable crop production and environmental health in a tropical soil like south eastern, Nigeria.</span></p> Nweke, I. A. ##submission.copyrightStatement## 2020-03-25 2020-03-25 2 2 p7 p7 10.30560/as.v2n2p7