Open Access Original Research Article

Characterization of Selected Gypsites of Tanzania for Agricultural Use

A. M. Primitiva, E. M. M. Marwa, A. K. Kaaya

International Journal of Plant & Soil Science, Page 1-9
DOI: 10.9734/IJPSS/2018/42205

This study was carried out to assess the suitability of gypsite as a soil amendment in the release of Ca and S. Besides the high potential of gypsite in improving crop yields in some countries, its use in Tanzanian agricultural soils is limited. This is attributed largely due to few types of research on their agricultural potentials. The gypsite samples used in this study were collected from Pindiro, Makanya, Itigi and Msagali sites. The X-ray fluorescence (XRF) method was  employed to analyse the chemical compositions of the composite samples. The XRF results showed that the gypsites from the four sites varied in amounts of gypsum content from 35.76 to 82.36% for gypsite from Itigi and Pindiro, respectively. The contents of S were 15.32, 13.26, 10.52 and 6.65% for Pindiro, Msagali, Makanya and Itigi gypsites respectively. Calcium contents were 11, 9.5, 7.6 and 4.8% for Pindiro, Msagali, Makanya and Itigi gypsites, respectively. Analysis on extractable nutrients shows that when gypsite from Pindiro and Msagali that contained a high amount of S and Ca when applied in the soil, plants will be able to extract different nutrients for their metabolism at the same time improving soil physical properties. All the studied gypsite samples contain potentially toxic elements (Cd, Co, Cr, Cu, Fe, Mn, Ni and Zn), but the levels are not potentially toxic to plants and hence do not interfere with plant nutrient uptake.  Characterization of gypsite from other deposits in the country is required to generate information on their quality, quantity and suitability for use on soil amendment for increased agricultural productivity in Tanzania

Open Access Original Research Article

Quality and Nutrient Content of Grapes as Influenced by Foliar Spray of Different Sources of Zinc

S. H. Ramya, C. T. Subbarayappa

International Journal of Plant & Soil Science, Page 1-11
DOI: 10.9734/IJPSS/2018/42326

Field experiments were conducted in grape orchard (cv Dilkush) of three year old during 2015-16 and 2016-17 to assess the effect of different sources of zinc on quality and nutrients content of grape by using randomised block design with twenty treatments and three replications. The experimental results of the study indicated that among various sources of zinc, zinc metalosate at 0.150 per cent zinc level recorded significantly higher total soluble solids (17.49º Brix), total sugars (18.64%), nitrogen (1.74%), potassium (1.89%), sulphur (0.52%), zinc (47.00 mg kg-1) and reduced titratable acidity (0.19%) in the fruit compared to control (T3) and other treatments but it was at par with the treatment T18 which received zinc @ 0.150 per cent through Zn-EDTA. There was a non-significant difference was observed among the treatments with respect to calcium, magnesium, copper, iron, manganese and boron content of fruit

Open Access Original Research Article

In vitro Evaluation of Botanicals against Fusarium Wilt of Coriander Caused by Fusarium oxysporum f. sp. Coriandrii (L.)

Kamala Rani Bammidi, B. P. Dandnayak

International Journal of Plant & Soil Science, Page 1-6
DOI: 10.9734/IJPSS/2018/43130

Efficacy of six plant extracts viz., NSKE (Neem Seed Kernel Extract), Mentha arvensis, Allium sativum, Zingiber officinalis, Neem oil, Allium cepa were tested against the pathogen by dual culture technique in the laboratory of College of agriculture, Latur. The extract of each plant species was diluted in order to achieve respective concentrations viz., 5 and 10 per cent. Of the botanicals tested, Allium sativum was found to be significantly the most effective with least mycelial growth (0.00 mm) and highest mycelial growth inhibition (100 %) of the test pathogen(Fusarium oxysporum f.sp coriandrii), followed by Neem oil with mycelial growth of 8.00 mm and inhibition percent of 82.22. The highest colony growth and lowest percent inhibition was observed with NSKE which was 37.33 mm and 17.04 per cent respectively

Open Access Original Research Article

Effects of Soil Fertilization Using Compost of Solid Household Waste on the Heavy Metals Content of the Productions

Ferdinand Gohi Bi Zro, Kan Benjamin Kouamé, Valère Kotchi, Albert Yao-Kouamé

International Journal of Plant & Soil Science, Page 1-8
DOI: 10.9734/IJPSS/2018/42042

This study was conducted to evaluate the chemical quality and fertilizing value of naturally occurring compost in the City of Daloa landfills. The treatments consist of i) lettuce culture on unfertilized soil or control, ii) lettuce culture on soil supplied with 250 kg/ha of NPK mineral fertilizer of formula 12-22-22 and iii) lettuce culture on soil amended with 40 t/ha of compost, laid out in a Randomized Complete Block Design (RCBD) with three replicates. Results indicate that the compost used contained significant amounts of N (0.88±0.09 g/kg), P2O5 (0.173±0.021 g/kg) and K2O (0.278±0.016 g/kg). This compost also contains, but in small amounts, toxic heavy metals such as copper (233.183±3.21 mg/kg), lead (113.775±2.55 mg/kg) and zinc (141.783±3.03 mg/kg). Regarding the crops, the analyzes revealed that lettuce grown in the presence of NPK and compost absorbed more heavy metals than those grown on the control soil. With NPK, heavy metal concentrations increased steadily in crops during all the crop cycles when, with compost, these concentrations remained almost stable between the first and second crop cycles before growing during the third cycle. It was concluded that fertilization, whether mineral or organic, can promote heavy metal accumulation in crops. Thus, the fertilization of agricultural soils should be conducted with great care

Open Access Review Article

Mangroves for Protection of Coastal Areas from High Tides, Cyclone and Tsunami

Swati Shedage, P. K. Shrivastava

International Journal of Plant & Soil Science, Page 1-11
DOI: 10.9734/IJPSS/2018/42151

Mangroves are salt-tolerant evergreen dense forests that grow in intertidal zones in tropical and subtropical estuarine regions and mud-flats. Additionally, mangrove forests provide many economical, ecological and environmental values to the people. The total mangrove forest area of the world in 2000 was 1, 37,800 square kilometres spanning 118 countries and territories [1]. According to state forest report of 2015 of Forest Survey of India, mangroves spread over 4,740 sq. km which is about 3 percent of world’s mangrove vegetation and 0.14 per cent of the country's total geographical area. Ecological valuation of the mangroves is mainly for its important role of protection and stabilization of coastal lands and estuarine. Mangroves are important means to control coastal erosion. They not only reduce erosion along the coast but also enhance sediment deposition which is essential to maintain their ecosystems. Several studies have been conducted using remote sensing and GIS which show that there is increased erosion rate in coastal areas where mangrove forests have died. Root architecture of mangroves is such that it traps sediments and prevents erosion from waves and storms. Mangrove forests also play an important role in many other edaphic functions which includes nutrient cycling, facilitation of plant nutrition, disease suppression, water purification, and biological attenuation of pollutants. The paper discusses different studies on coastal erosion, physico-chemical properties of soil, soil nutrition, soil organic carbon and relationship of soil with species composition and structure of mangrove forests in tropical mangrove environment. The study will help in exploring future research for reforestation of deforested mangrove sites, their management and conservation.