標(biāo)題: Titlebook: Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa; A. Uzo Mokwunye Book 1991 Springer Science+Business Me [打印本頁] 作者: CHORD 時(shí)間: 2025-3-21 17:31
書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa影響因子(影響力)
書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa影響因子(影響力)學(xué)科排名
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書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa被引頻次
書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa被引頻次學(xué)科排名
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書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa年度引用學(xué)科排名
書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa讀者反饋
書目名稱Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa讀者反饋學(xué)科排名
作者: 使痛苦 時(shí)間: 2025-3-21 23:58
978-94-010-5421-8Springer Science+Business Media Dordrecht 1991作者: creatine-kinase 時(shí)間: 2025-3-22 02:30 作者: Awning 時(shí)間: 2025-3-22 06:13 作者: BAIL 時(shí)間: 2025-3-22 09:18 作者: pessimism 時(shí)間: 2025-3-22 15:09 作者: 外科醫(yī)生 時(shí)間: 2025-3-22 19:20
Electrical Circuits and Simulation Results,such as N rate, mode of N fertilizer application and choice of N sources for different agroecological zones of West Africa are discussed in relation to crop yield response. The interactive effects of cropping density and rainfall on N efficiency and yield are examined with particular emphasis on pro作者: Inculcate 時(shí)間: 2025-3-23 01:15
Electrical Circuits and Simulation Results,ials currently available in the region will lead to increased incidence of sulfur (S) deficiency. In order to determine the S fertilizer requirements of major cereal crops, and compare the fate and efficiency of alternative S sources, experiments were conducted at six sites in semiarid and subhumid 作者: CHASM 時(shí)間: 2025-3-23 04:32
M. Jeroen Fonderie,Johan H. Huijsinge systems such as bush fallow rotations, grass fallow systems (which are in many cases combined with trees) and planted fallow systems have proved to be very effective and can be modified in the context of today’s needs and circumstances to reduce nutrient losses, prevent nutrient imbalance, restitu作者: Diatribe 時(shí)間: 2025-3-23 06:22
M. Jeroen Fonderie,Johan H. Huijsingng efficient use of fertilizers. Although several constraints limit the usefulness of fertilizers, progress has been made through careful experimentation in identifying and removing these constraints. In West Africa, sustainable agriculture is impossible in the absence of fertilizers because of the 作者: 駁船 時(shí)間: 2025-3-23 10:02 作者: 山間窄路 時(shí)間: 2025-3-23 17:33
Vincent S. L. Cheung,Howard C. Luongion with the International Fertilizer Development Center (IFDC). Results show that crop needs for N, P, and S depend on the plant characteristics, climatic and edaphic factors. In Saria, at the northern tip of the Sudan zone, application of 30 kgN/ha, 13.2 kg P/ha and 25 kg K/ha produced the highest作者: 友好 時(shí)間: 2025-3-23 18:45 作者: 悠然 時(shí)間: 2025-3-23 22:22
Design and Power Considerations,agricultural production in the Gambia. A lot of the early work on soil fertility and fertilizers was on cash crops. Recent studies by the Ministry of Agriculture and by such agencies as the FAO have emphasized on-farm research on food crops. Collaborative research with the International Fertilizer D作者: Conquest 時(shí)間: 2025-3-24 02:41 作者: 裝勇敢地做 時(shí)間: 2025-3-24 06:35 作者: 嘴唇可修剪 時(shí)間: 2025-3-24 13:49
B. Milner,V. Rapoport,L. Yevenkols in Liberia are highly leached and acidic Ultisols. Nitrogen and phosphorus, in that order, are the two most limiting nutrients in these soils which are dominated by 1.1 lattice clays. Many of the earliest trials showed that crops responded positively to the use of fertilizers. However, little or 作者: 巨頭 時(shí)間: 2025-3-24 16:48 作者: Aspirin 時(shí)間: 2025-3-24 22:09
B. Milner,V. Rapoport,L. Yevenkothese nutrients are needed in the soils. While confirming the widespread deficiencies of N and P, the trials also showed that only moderate amounts of N and P are required to overcome these deficiencies and satisfy crop needs. Nitrogen fertilizers applied at rates of 80 kg/ha should be split applied作者: PANEL 時(shí)間: 2025-3-25 01:31 作者: 觀點(diǎn) 時(shí)間: 2025-3-25 05:41
B. Milner,V. Rapoport,L. Yevenkohe level of soil organic matter have resulted in decreased soil productivity. The addition of organic materials either in the form of manures or crop residue has beneficial effects on the soils’ chemical and physical properties. For many of the countries in this region, the amounts of nutrients in c作者: ORBIT 時(shí)間: 2025-3-25 09:00
Mustafijur Rahman,Ramesh Harjanie region has declined over the years. The ratio between production and apparent demand fell from 0.38 in 1970/71 to 0.23 in 1987/88. To alleviate fertilizer supply constraints and reduce costs, the following measures are recommended to governments, donor agencies and research institutions:作者: 隱藏 時(shí)間: 2025-3-25 13:19
https://doi.org/10.1007/978-3-319-57033-4e trend of declining yields. Developing better understanding of such climate-related constraints as high intensity storms, inadequate rainfall or poor rainfall distribution, high temperatures and high evaporative demands, excessive rainfall and high erodibility of soils will result in measures that can overcome or mitigate these constraints.作者: Nomadic 時(shí)間: 2025-3-25 18:20 作者: LUCY 時(shí)間: 2025-3-25 23:13
Alleviating fertilizer supply constraints in West Africa,e region has declined over the years. The ratio between production and apparent demand fell from 0.38 in 1970/71 to 0.23 in 1987/88. To alleviate fertilizer supply constraints and reduce costs, the following measures are recommended to governments, donor agencies and research institutions:作者: 報(bào)復(fù) 時(shí)間: 2025-3-26 02:53
Climatic constraints to crop production and fertilizer use,e trend of declining yields. Developing better understanding of such climate-related constraints as high intensity storms, inadequate rainfall or poor rainfall distribution, high temperatures and high evaporative demands, excessive rainfall and high erodibility of soils will result in measures that can overcome or mitigate these constraints.作者: 拔出 時(shí)間: 2025-3-26 04:36
arent materials of the soils of tropical Africa are old, highly weathered and devoid of bases and phosphate-bearing minerals. Traditional farming systems which were relatively stable and sustainable relied on long fallow periods after one to two years of cropping to maintain the productive capacity 作者: 咽下 時(shí)間: 2025-3-26 12:17 作者: Dedication 時(shí)間: 2025-3-26 13:57
Efficient fertilizer use for increased crop production: Use of phosphorus fertilizers in concretiontic concretions. Phosphorus desorption, however showed the opposite trend. Phosphorus sorption isotherms were also used to estimate phosphorus fertilizer rates on the concretional soils. The growth and yield of millet approached maximum when the sorption equilibrium solution P level was 0.2 ppm.作者: prodrome 時(shí)間: 2025-3-26 20:34 作者: Longitude 時(shí)間: 2025-3-26 22:55
M. Jeroen Fonderie,Johan H. Huijsingement techniques for testing fertilizer sources and fertilizer management practices at several locations over an entire region. The West African Fertilizer Management and Evaluation Network (WAFMEN) provides such a framework for promoting fertilizer use efficiency in West Africa.作者: 頂點(diǎn) 時(shí)間: 2025-3-27 03:37
Overcoming soil fertility constraints to crop production in West Africa: Impact of traditional and e existing body of knowledge and identify and adapt possible solutions to overcome specific constraints. In this respect, farmer participation in the design and conduct of such on-farm tests is invaluable.作者: 商議 時(shí)間: 2025-3-27 08:15 作者: dilute 時(shí)間: 2025-3-27 10:28 作者: Graphite 時(shí)間: 2025-3-27 15:46
Electrical Circuits and Simulation Results,duction of millet in Niger. The potential role of new, slow-release fertilizers as well as urea amended with urease inhibitors is mentioned in relation to present and future fertilizer N requirements in West Africa.作者: 取消 時(shí)間: 2025-3-27 19:01
Vincent S. L. Cheung,Howard C. Luongate of 7.5 kg/ha also benefitted the maize crop. Point placement of nitrogen fertilizers enhanced the loss of N. Fifty percent (50%) partially acidulated phosphate rock was as efficient as commercial superphosphates. At Farako-ba plants responded to phosphate rock applied at the rate of 13.2 kg P/ha.作者: 配偶 時(shí)間: 2025-3-27 22:28
Design and Power Considerations,d and incorporated outperformed that which was broadcast and left on the soil surface. Tilemsi phosphate rock from Mali was agronomically as effective as commercial superphosphates in terms of both direct effects and residual effects thereby confirming the place of this phosphate rock as one of West Africa’s best for direct application.作者: 落葉劑 時(shí)間: 2025-3-28 05:40
B. Milner,V. Rapoport,L. Yevenkoas commercial superphosphate. Preliminary results from nutrient interaction experiments suggest that efficiency of fertilizers can be improved by ensuring appropriate balance of nutrients applied to the soil.作者: 會犯錯誤 時(shí)間: 2025-3-28 09:47 作者: 令人心醉 時(shí)間: 2025-3-28 12:17 作者: narcotic 時(shí)間: 2025-3-28 17:56
Efficient fertilizer use for crop production: The Gambia experience,d and incorporated outperformed that which was broadcast and left on the soil surface. Tilemsi phosphate rock from Mali was agronomically as effective as commercial superphosphates in terms of both direct effects and residual effects thereby confirming the place of this phosphate rock as one of West Africa’s best for direct application.作者: 可以任性 時(shí)間: 2025-3-28 21:25 作者: 生氣的邊緣 時(shí)間: 2025-3-29 00:50
Role of manures and crop residue in alleviating soil fertility constraints to crop production: Withrop residue for soil fertility improvement cannot be overstressed. It is essential that more information on the rates of organic matter decomposition as well as the many reactions between products of organic matter decomposition and the soil under WASAT conditions be made available.作者: NOT 時(shí)間: 2025-3-29 05:56
Book 1991rials of the soils of tropical Africa are old, highly weathered and devoid of bases and phosphate-bearing minerals. Traditional farming systems which were relatively stable and sustainable relied on long fallow periods after one to two years of cropping to maintain the productive capacity of the soi作者: Hemiplegia 時(shí)間: 2025-3-29 10:41
Alleviating fertilizer policy constraints to increased fertilizer use and increased food productiond growth in agricultural production. The influx of commercially imported or donated foodgrains has helped many governments to maintain a policy of low food prices, usually for the benefit of the vocal urban dwellers. Such practices tend to kill the incentive for increased local production of foodgra作者: 奇思怪想 時(shí)間: 2025-3-29 14:08
Alleviating fertilizer supply constraints in West Africa,e region has declined over the years. The ratio between production and apparent demand fell from 0.38 in 1970/71 to 0.23 in 1987/88. To alleviate fertilizer supply constraints and reduce costs, the following measures are recommended to governments, donor agencies and research institutions:作者: 終點(diǎn) 時(shí)間: 2025-3-29 18:59 作者: 路標(biāo) 時(shí)間: 2025-3-29 23:46
Climatic constraints to crop production and fertilizer use,e trend of declining yields. Developing better understanding of such climate-related constraints as high intensity storms, inadequate rainfall or poor rainfall distribution, high temperatures and high evaporative demands, excessive rainfall and high erodibility of soils will result in measures that 作者: 要素 時(shí)間: 2025-3-30 03:37
Alleviating soil fertility constraints to food production in West Africa: Efficiency of nitrogen fesuch as N rate, mode of N fertilizer application and choice of N sources for different agroecological zones of West Africa are discussed in relation to crop yield response. The interactive effects of cropping density and rainfall on N efficiency and yield are examined with particular emphasis on pro作者: ADORE 時(shí)間: 2025-3-30 07:10 作者: anthropologist 時(shí)間: 2025-3-30 10:19 作者: Affable 時(shí)間: 2025-3-30 12:22
Management of fertilizer research data: General concepts,ng efficient use of fertilizers. Although several constraints limit the usefulness of fertilizers, progress has been made through careful experimentation in identifying and removing these constraints. In West Africa, sustainable agriculture is impossible in the absence of fertilizers because of the 作者: Blood-Clot 時(shí)間: 2025-3-30 16:34
Overcoming soil nutrient constraints to crop production in West Africa: Importance of fertilizers ance, their fertility has become perilously low and the task of increasing or even maintaining the productive capacity of these soils has become perhaps the greatest challenge to agricultural scientists in this latter half of the 20th century..Water is useful not only for the growth of plants but als作者: 性上癮 時(shí)間: 2025-3-30 23:02
,Utilisation efficace des engrais azotés pour une augmentation de la production vivrière: L’expérienion with the International Fertilizer Development Center (IFDC). Results show that crop needs for N, P, and S depend on the plant characteristics, climatic and edaphic factors. In Saria, at the northern tip of the Sudan zone, application of 30 kgN/ha, 13.2 kg P/ha and 25 kg K/ha produced the highest作者: PALL 時(shí)間: 2025-3-31 03:46 作者: BRAWL 時(shí)間: 2025-3-31 05:31 作者: 盡管 時(shí)間: 2025-3-31 11:29 作者: artless 時(shí)間: 2025-3-31 17:00 作者: interference 時(shí)間: 2025-3-31 17:41 作者: progestin 時(shí)間: 2025-3-31 22:47 作者: 雇傭兵 時(shí)間: 2025-4-1 04:43 作者: Abrupt 時(shí)間: 2025-4-1 08:07 作者: itinerary 時(shí)間: 2025-4-1 11:09
Role of manures and crop residue in alleviating soil fertility constraints to crop production: Withhe level of soil organic matter have resulted in decreased soil productivity. The addition of organic materials either in the form of manures or crop residue has beneficial effects on the soils’ chemical and physical properties. For many of the countries in this region, the amounts of nutrients in c
