Papers by Christian Obiazi
Journal of Biology, Agriculture and Healthcare, 2013
Cassava is one of the most productive crops in the world. It continuously provides a sustained fo... more Cassava is one of the most productive crops in the world. It continuously provides a sustained food supply when other crops fail thereby alleviating famine conditions. Cassava is relatively drought tolerant. Some improved cassava varieties combine weed suppression with high yields; others as well show resistance to diseases and insect pests, while some have good qualities for consumers’ acceptance and low cyanide content. Biological control will continuously be exploited to control cassava pests. Prussic acid content in cassava tubers hampers its utilization in unprocessed state. When planting commences as soon as land preparation had taken place, there is reduced initial weed pressure on the crop. Inclusion of cover crops like melon or cowpea reduces the excessive need for weed control. Indications abound that tillage activities such as ploughing and harrowing enhance the effectiveness of especially pre-emergence herbicides. A significant contribution towards increased cassava pro...
Asian Journal of Agriculture and Rural Development, 2020
Okra productivity is reduced by weed interference. Farmers rely on expensive and highly labour in... more Okra productivity is reduced by weed interference. Farmers rely on expensive and highly labour intensive manual weeding. Herbicides reduce labour involvement and cost of weed control. Few herbicides tagged for okra production are scarce. The key objectives of this study are to determine the tolerance of okra to some widely used herbicides and evaluate the growth performance of okra in the selected herbicides. The average phytotoxicity levels of each of the herbicides for 2013 and 2014 field trials were in the order of zero in pendimethalin at 2.0 kg a.i./ha, 4.2 in metholachlor+atrazine at 2.64 kg a.i./ha and 5.5 in atrazine at 3.0 kg a.i./ha, on a 0-10 scale. Okra stands establishment was (95.2%) in pendimethalin and (93.1%) in hoe-weeded plots, these were significantly greater than 62.8% and 56.9% obtained in metholachlor+atrazine at 2.64 kg a.i./ha and atrazine at 3.0 kg a.i./ha, respectively. Hoe-weeded plots had shoot dry weight of 7.9 g/plant which was similar to 7.3 g/plant obtained in pendimethalin treated plots; these were significantly greater than 4.1 g/plant obtained in plots that received atrazine. Pendimethalin which caused no phytotoxic effect on okra and provided enhanced stand establishment and growth comparable with hoe-weeded should be listed for okra production. Contribution/ Originality The study has substantiated that pendimethalin should be added to the list of herbicides for okra (Abelmoschus esculentus L. Moench) production. It also opens up the possibility for farmers and researchers to start considering planting okra in mixture with other crops where pendimethalin is used. Because pendimethalin is widely used for weed control in other crops in the place of the study, scarcity of the herbicide at critical moments of need may be uncommon. The paper has never been published before or presently submitted anywhere for this purpose.
International Journal of Phytology Research, 2022
Weeds depress yields of crops in mixtures. Intercrops sometimes differ in farm duration and weed ... more Weeds depress yields of crops in mixtures. Intercrops sometimes differ in farm duration and weed management requirements. Maize and cassava vary in their farm duration. Average dry maize grain yields were 3.0 Weed Free (WF) = 3.0 (Hoe-weeded three times) (HW3)> 2.9 Hoe-Weeded two times (HW2)> 2.5 (Weedy check)> 2.3 t/ha (HW1). The average yield of cassava fresh tubers were 33.0 (WF)> 26.1 (HW3)> 22.3 (HW2)> 9.7 (HW1)> 6.3 t/ha (weedy check). One or two hoe-weeding was sufficient for appreciable yield of maize, while the third weeding at nine weeks was more beneficial for cassava than for maize. In a cassava maize mixture, three hoe-weeding is recommended for suitable yield of cassava in the mixture.
Journal of Biology, Agriculture and Healthcare , 2013
Cassava is one of the most productive crops in the world. It continuously provides a sustained fo... more Cassava is one of the most productive crops in the world. It continuously provides a sustained food supply when other crops fail thereby alleviating famine conditions. Cassava is relatively drought tolerant. Some improved cassava varieties combine weed suppression with high yields; others as well show resistance to diseases and insect pests, while some have good qualities for consumers' acceptance and low cyanide content. Biological control will continuously be exploited to control cassava pests. Prussic acid content in cassava tubers hampers its utilization in unprocessed state. When planting commences as soon as land preparation had taken place, there is reduced initial weed pressure on the crop. Inclusion of cover crops like melon or cowpea reduces the excessive need for weed control. Indications abound that tillage activities such as ploughing and harrowing enhance the effectiveness of especially pre-emergence herbicides. A significant contribution towards increased cassava production would be the provision of disease resistance, low cyanide content and high yielding cassava stems for distribution to farmers at appropriate times and at affordable prices.
Asian Journal of Agriculture and Rural Development, 2020
Okra productivity is reduced by weed interference. Farmers rely on expensive and highly labour in... more Okra productivity is reduced by weed interference. Farmers rely on expensive and highly labour intensive manual weeding. Herbicides reduce labour involvement and cost of weed control. Few herbicides tagged for okra production are scarce. The key objectives of this study are to determine the tolerance of okra to some widely used herbicides and evaluate the growth performance of okra in the selected herbicides. The average phytotoxicity levels of each of the herbicides for 2013 and 2014 field trials were in the order of zero in pendimethalin at 2.0 kg a.i./ha, 4.2 in metholachlor+atrazine at 2.64 kg a.i./ha and 5.5 in atrazine at 3.0 kg a.i./ha, on a 0-10 scale. Okra stands establishment was (95.2%) in pendimethalin and (93.1%) in hoe-weeded plots, these were significantly greater than 62.8% and 56.9% obtained in metholachlor+atrazine at 2.64 kg a.i./ha and atrazine at 3.0 kg a.i./ha, respectively. Hoe-weeded plots had shoot dry weight of 7.9 g/plant which was similar to 7.3 g/plant obtained in pendimethalin treated plots; these were significantly greater than 4.1 g/plant obtained in plots that received atrazine. Pendimethalin which caused no phytotoxic effect on okra and provided enhanced stand establishment and growth comparable with hoe-weeded should be listed for okra production.
Asian Journal of Agriculture and Rural Development, 2020
Okra productivity is reduced by weed interference. Farmers rely on expensive and highly labour in... more Okra productivity is reduced by weed interference. Farmers rely on expensive and highly labour intensive manual weeding. Herbicides reduce labour involvement and cost of weed control. Few herbicides tagged for okra production are scarce. The key objectives of this study are to determine the tolerance of okra to some widely used herbicides and evaluate the growth performance of okra in the selected herbicides. The average phytotoxicity levels of each of the herbicides for 2013 and 2014 field trials were in the order of zero in pendimethalin at 2.0 kg a.i./ha, 4.2 in metholachlor+atrazine at 2.64 kg a.i./ha and 5.5 in atrazine at 3.0 kg a.i./ha, on a 0-10 scale. Okra stands establishment was (95.2%) in pendimethalin and (93.1%) in hoe-weeded plots, these were significantly greater than 62.8% and 56.9% obtained in metholachlor+atrazine at 2.64 kg a.i./ha and atrazine at 3.0 kg a.i./ha, respectively. Hoe-weeded plots had shoot dry weight of 7.9 g/plant which was similar to 7.3 g/plant obtained in pendimethalin treated plots; these were significantly greater than 4.1 g/plant obtained in plots that received atrazine. Pendimethalin which caused no phytotoxic effect on okra and provided enhanced stand establishment and growth comparable with hoe-weeded should be listed for okra production.
Yuzuncu Yıl University Journal of Agricultural Science, 2021
Abstract: Climate change effect on agricultural productivity is very glaring.
There is an advoca... more Abstract: Climate change effect on agricultural productivity is very glaring.
There is an advocacy for arable crops farmers to take advantage of the Nigeria meteorological services (NIMET) as part of adaptation strategies against climate change. Having an insight into the constraints to access and utilization agrometeorological services is worthwhile for agricultural extension programme planning. This study evaluated assessed the constraint to access and utilization of agro-meteorological service among arable crop farmers in Delta State Nigeria. The agro-meteorological services that were most made available to them ranged from daily weather forecast to seasonal weather condition. The farmers mostly accessed and utilized daily weather forecast, seasonal rainfall prediction, information on crop stages performance and general weather condition. However,
untimely release and transmission of the needed information was the major constraint to utilization of agro-meteorological services. The farmers’ socioeconomic attributes such as level of formal education, household size, farm size, extension contact and membership of farmers’ association influenced the utilization of agro-meteorological services. It is concluded that the level of access to and utilization of agro-meteorological services is low as a result of the constraints experienced by the farmers. It was recommended that agrometeorological services information need to be disseminated timely and the information be simplified before dissemination to farmers.
Keywords
Adaptation strategies, Agro-meteorological services, Arable crop farmers,
Climate change, Meteorological information utilization.
Journal of Biology, Agriculture and Healthcare , 2013
Cassava is one of the most productive crops in the world. It continuously provides a sustained fo... more Cassava is one of the most productive crops in the world. It continuously provides a sustained food supply when other crops fail thereby alleviating famine conditions. Cassava is relatively drought tolerant. Some improved cassava varieties combine weed suppression with high yields; others as well show resistance to diseases and insect pests, while some have good qualities for consumers' acceptance and low cyanide content. Biological control will continuously be exploited to control cassava pests. Prussic acid content in cassava tubers hampers its utilization in unprocessed state. When planting commences as soon as land preparation had taken place, there is reduced initial weed pressure on the crop. Inclusion of cover crops like melon or cowpea reduces the excessive need for weed control. Indications abound that tillage activities such as ploughing and harrowing enhance the effectiveness of especially pre-emergence herbicides. A significant contribution towards increased cassava production would be the provision of disease resistance, low cyanide content and high yielding cassava stems for distribution to farmers at appropriate times and at affordable prices.
Abstract: A study was carried out to evaluate the effects of blends of swine manure (SM) with san... more Abstract: A study was carried out to evaluate the effects of blends of swine manure (SM) with sandy soil (SS) on the early growth of tomatoes [Lycopersion esculentum mills] from July to September, 2015. Swine manure was mixed with SS at the rate of 0, 25, 50, 75 and 100% respectively on volume/volume basis of the dry materials. The treatments were 100% SS, 75% SS+25% SM, 50% SS+50% SM, and 100% SM. The five treatments were laid out in a completely randomized design and replicated three times. Inclusion of SM in SS significantly improved the level of seedling emergence, number of leaves per plant, plants height and total biomass of tomato seedlings. Fifty and 75% levels of inclusion of SM had similar effects on most growth attributes of tomatoes seedlings; the use of 50% SM and 50% SS was the optimum in this study. An equal volume of SS and SM is suggested as the medium for producing vigorous tomato seedlings in Asaba. Seedlings raised in 50% SS+50% SM had 54.8% more seedlings emerge...
Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi
Climate change effect on agricultural productivity is very glaring. There is an advocacy for arab... more Climate change effect on agricultural productivity is very glaring. There is an advocacy for arable crops farmers to take advantage of the Nigeria meteorological services (NIMET) as part of adaptation strategies against climate change. Having an insight into the constraints to access and utilization agro-meteorological services is worthwhile for agricultural extension programme planning. This study evaluated assessed the constraint to access and utilization of agro-meteorological service among arable crop farmers in Delta State Nigeria. The agro-meteorological services that were most made available to them ranged from daily weather forecast to seasonal weather condition. The farmers mostly accessed and utilized daily weather forecast, seasonal rainfall prediction, information on crop stages performance and general weather condition. However, untimely release and transmission of the needed information was the major constraint to utilization of agro-meteorological services. The farmer...
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Papers by Christian Obiazi
There is an advocacy for arable crops farmers to take advantage of the Nigeria meteorological services (NIMET) as part of adaptation strategies against climate change. Having an insight into the constraints to access and utilization agrometeorological services is worthwhile for agricultural extension programme planning. This study evaluated assessed the constraint to access and utilization of agro-meteorological service among arable crop farmers in Delta State Nigeria. The agro-meteorological services that were most made available to them ranged from daily weather forecast to seasonal weather condition. The farmers mostly accessed and utilized daily weather forecast, seasonal rainfall prediction, information on crop stages performance and general weather condition. However,
untimely release and transmission of the needed information was the major constraint to utilization of agro-meteorological services. The farmers’ socioeconomic attributes such as level of formal education, household size, farm size, extension contact and membership of farmers’ association influenced the utilization of agro-meteorological services. It is concluded that the level of access to and utilization of agro-meteorological services is low as a result of the constraints experienced by the farmers. It was recommended that agrometeorological services information need to be disseminated timely and the information be simplified before dissemination to farmers.
Keywords
Adaptation strategies, Agro-meteorological services, Arable crop farmers,
Climate change, Meteorological information utilization.
There is an advocacy for arable crops farmers to take advantage of the Nigeria meteorological services (NIMET) as part of adaptation strategies against climate change. Having an insight into the constraints to access and utilization agrometeorological services is worthwhile for agricultural extension programme planning. This study evaluated assessed the constraint to access and utilization of agro-meteorological service among arable crop farmers in Delta State Nigeria. The agro-meteorological services that were most made available to them ranged from daily weather forecast to seasonal weather condition. The farmers mostly accessed and utilized daily weather forecast, seasonal rainfall prediction, information on crop stages performance and general weather condition. However,
untimely release and transmission of the needed information was the major constraint to utilization of agro-meteorological services. The farmers’ socioeconomic attributes such as level of formal education, household size, farm size, extension contact and membership of farmers’ association influenced the utilization of agro-meteorological services. It is concluded that the level of access to and utilization of agro-meteorological services is low as a result of the constraints experienced by the farmers. It was recommended that agrometeorological services information need to be disseminated timely and the information be simplified before dissemination to farmers.
Keywords
Adaptation strategies, Agro-meteorological services, Arable crop farmers,
Climate change, Meteorological information utilization.