ABSTRACT As climate change continues to threaten ecosystems’ functions, agriculture remains one of the major source of greenhouse gas (GHG) emissions that are responsible for global warming. The major GHG in agriculture are; carbon dioxide (CO2), nitrous oxide (N2O) and methane (CH4). Unfortunately, agriculture is also one of the most affected sectors by climate change. There is therefore need to reduce emissions by adopting agricultural practices with mitigation potential. This is by enha...
ABSTRACT Soybean (Glycine max L. Merril) productivity in Kenya is adversely affected by low yield, poor fertilizer use, ineffective inoculation, and soil fertility management constraints. The empirical understanding of the interaction between native soil rhizobia, inoculation, nitrogen fixation, soil fertility management practices and how these factors influence soybean productivity is insufficient. The general objective of this study was to investigate the effect of rhizobium inoculation an...
Agriculture in Rwanda is today characterized by low agricultural productivity due to soil fertility decline. This is mainly attributed to the mining of nutrients due to continuous cropping without adequate external addition of inputs. The adoption of Integrated Soil Fertility Management (ISFM) technologies such as the combination of organic manure and mineral fertilizers is being taken as one of solutions to this situation. A study was therefore, conducted to investigate the effects of f...
ABSTRACT In South Kivu Eastern of DR.Congo, most soils are highly weathered, leached and have low nutrients content resulting to low agricultural productivity. The objectives of the study was (i)to evaluate the effect of combining rhizobia inoculation and different fertilizer amendment on biomass and grain yields,(ii) to assess the nitrogen fixation efficacy of commercial rhizobia strains and (iii) to assess the effect of combining rhizobia inoculation and different fertilizer amendments on s...
A BST RA CT Green house experiment was conducted to study the effects of organic manure, lime and inorganic fertilizer on the nodulation and growth of Soybean (Glycine max(L) merrill) on an acid ultisol in southeastern Nigeria. The organic manure was poultry manure, the lime was commercial lime and the inorganic fertilizer was NPK(15 : 15: 15). There were 7 treatments and a control. The treatments were 100kg/ha inorganic fertilizer (NPK 15: 15: 15)(F1 );200kglhainorganicfertilizcr(NPK 1...
ABSTRACT Reduced food productivity in smallholder farms is the principal cause of food insecurity in semi-arid parts of Kenya. This is mainly attributed to decline in soil fertility, low and unreliable rainfall, land degradation and adverse effects of climate change. The solution lies in the efficient use of nutrients and planting of drought tolerant crop varieties that can cope with the low rainfall in the ASALs. The aim of this study was to evaluate the effect of FYM, mineral fertilizers a...
ABSTRACT Low crop responses to fertilizer application among small holder farms are common phenomena in degraded acidic soils of western Kenya. Continuous growing of maize without commensurate soil nutrient replenishment coupled with application of soil acidifying fertilizers, especially Di-ammonium Phosphate (DAP) and Sulphate of ammonia (SA) have aggravated the soil acidity problem. An on-farm trial was sited in Shianda sub-location, East Wanga division in Mumias district, Western province, ...
ABSTRACT Mozambique lags behind all other Southern and Eastern African countries in maize production leading to maize imports. Soil nutrient depletion, lack of combination of organic resources with mineral resources coupled with high soil acidity has been identified as the main causes of the declining crop yields. Maize yield in smallholder systems in central Mozambique can be increased by optimum utilization of mineral fertilizers combined with cattle manure and other locally available organ...
ABSTRACT This research was carried out to characterize, classify, and evaluate soils of four geomorphic units in Oguta Imo State Southeastern Nigeria. Four Pedons, each was located in each geomorphic unit. ] soil sampling was carried out in the study site, sixteen surface soil samples (0-20 cm) were collected, four from each of the geomorphic units using an auger giving a total of thirty three soil samples which was chosen to represent the main morphological variations and to present mapping...
ABSTRACT The soils of Owerri area, Southeastern Nigeria were studied with a view to characterizing and classifying them. Four locations namely Umuhu (control), Amakohia (summit), Akpodim (midslope) and Ife (footslope) were selected in the study area, to assess the impact of topography on soil properties. Three profile pits were dug in each site. 65 soil samples were collected and examined with regards to their morphological, physical and chemical properties. Test for variance was carried out...
ABSTRACT A study was conducted in the runoff plots at the University of Nigeria Nsukka Teaching and Research Farm, in 2010 and 2011 to monitor the changes in aggregate stability, and some selected physicochemical properties of Nkpologu sandy loam soil under different cover and soil management systems. The management systems were bare fallow (BF), grass fallow (GF), legume (CE), groundnut (GN), sorghum (SM), and cassava (CA) cultivation. Following the characterization of the soil of the study...
ABSTRACT Indiscriminate and uncontrolled mining activities give rise to significant negative environmental impacts such as pollution of water bodies and farm lands, thus leading to decrease in soil fertility and soil quality as well as land degradation and changes in landscape. Therefore, this research was conducted to evaluate the impact of solid minerals mining at the Enyigba Lead-Zinc mining district in Abakaliki L.G.A of Ebonyi State and to document the present state of soil physico-chem...
ABSTRACT Poor soil fertility and high disease incidences particularly BW are the main constraints to potato production in Njoro, Kenya. Reduction of potato yield of between 30 – 70% has been attributed to bacterial wilt alone. Against this back drop, a trial was conducted in 2012 as part of a shortterm crop rotation experiment (2 years) to investigate the effect of crop-rotation on soil bacterial wilt population and potato yield. The experiment was set up in a randomized complete block des...
ABSTRACT Cassava is an important food crop grown across Mali which is cultivated on Ultisols in Sikasso region situated in the southern part of the country. The lack of recommended inorganic fertilizer is among the main constraints in cassava production in the country. The N, P and K inorganic fertilization is not well practiced due to its high cost and no effective fertilizer use packages. This study aimed at determining the effect of four NPK fertilizer (15- 15-15) rates (0kg, 100kg, 200kg...
ABSTRACT Soybean is an important cash crop with a growing demand in Malawi. Its ability to fix nitrogen has been exploited through the use of rhizobia inoculants to supplement indigenous rhizobia and improve soil fertility. Previous research has however shown instances whereby inoculation has had no yield response which suggests a need to fill the knowledge gap on the nitrogen fixation efficiency of indigenous rhizobia. The main objective of this study was to contribute to increased soybean y...