scholarly journals Long-Term Soil Fertility Trials in Niger, West Africa

2012 ◽  
pp. 105-120 ◽  
Author(s):  
A. Abdou ◽  
S. Koala ◽  
A. Bationo
Keyword(s):  
West Africa ◽  
Soil Fertility

Long-term effects of fallow systems and lengths on crop production and soil fertility maintenance in West Africa

2005 ◽  
Vol 71 (2) ◽  
pp. 139-150 ◽  
Author(s):  
G. Tian ◽  
B. T. Kang ◽  
G. O. Kolawole ◽  
P. Idinoba ◽  
F. K. Salako
Keyword(s):  
West Africa ◽  
Soil Fertility ◽  
Crop Production ◽  
Long Term Effects ◽  
Fallow Systems

Slave Traders by Invitation

2018 ◽  
Author(s):  
Finn Fuglestad
Keyword(s):  
West Africa ◽  
Slave Trade ◽  
Human Settlement ◽  
Local Setting ◽  
Slave Traders ◽  
Atlantic Slave Trade

The small Slave Coast between the river Volta and Lagos, and especially its central part around Ouidah, was the epicentre of the slave trade in West Africa. But it was also an inhospitable, surf-ridden coastline, subject to crashing breakers and devoid of permanent human settlement. Nor was it easily accessible from the interior due to a lagoon which ran parallel to the coast. The local inhabitants were not only sheltered against incursions from the sea, but were also locked off from it. Yet, paradoxically, this small coastline witnessed a thriving long-term commercial relationship between Europeans and Africans, based on the trans-Atlantic slave trade. How did it come about? How was it all organized? Dahomey is usually cited as the Slave Coast's archetypical slave raiding and slave trading polity. An originally inland realm, it was a latecomer to the slave trade, and simply incorporated a pre-existing system by dint of military prowess, which ultimately was to prove radically counterproductive. Dahomey, which never controlled more than half of the region we call the Slave Coast, represented an anomaly in the local setting, an anomaly the author seeks to define and to explain.

Long-term liming improves soil fertility and soybean root growth, reflecting improvements in leaf gas exchange and grain yield

2021 ◽  
Vol 128 ◽  
pp. 126308
Author(s):  
João William Bossolani ◽  
Carlos Alexandre Costa Crusciol ◽  
José Roberto Portugal ◽  
Luiz Gustavo Moretti ◽  
Ariani Garcia ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Root Growth ◽  
Soil Fertility ◽  
Grain Yield ◽  
Leaf Gas Exchange ◽  
Soybean Root

Improved soil fertility and weed management is profitable for irrigated rice farmers in Sahelian West Africa

2000 ◽  
Vol 66 (2) ◽  
pp. 101-113 ◽  
Author(s):  
S.M Haefele ◽  
D.E Johnson ◽  
S Diallo ◽  
M.C.S Wopereis ◽  
I Janin
Keyword(s):  
West Africa ◽  
Soil Fertility ◽  
Weed Management ◽  
Irrigated Rice ◽  
Rice Farmers

scholarly journals Crop Yield and Soil Fertility Status of Long-Term Rice-Rice-Wheat Cropping Systems

2017 ◽  
Vol 5 (1) ◽  
pp. 42-50
Author(s):  
Nabin Rawal ◽  
Rajan Ghimire ◽  
Devraj Chalise
Keyword(s):  
Soil Fertility ◽  
Crop Yield ◽  
Management Practices ◽  
Crop Yields ◽  
Oryza Sativa L ◽  
Farmyard Manure ◽  
Wheat Yield ◽  
Nutrient Supply ◽  
Available Phosphorus

Balanced nutrient supply is important for the sustainable crop production. We evaluated the effects of nutrient management practices on soil properties and crop yields in rice (Oryza sativa L.) - rice - wheat (Triticum aestivum L.) system in a long-term experiment established at National Wheat Research Program (NWRP), Bhairahawa, Nepal. The experiment was designed as a randomized complete block experiment with nine treatments and three replications. Treatments were applied as: T1- no nutrients added, T2- N added; T3- N and P added; T4- N and K added; T5- NPK added at recommended rate for all crops. Similarly, T6- only N added in rice and NPK in wheat at recommended rate; T7- half N; T8- half NP of recommended rate for both crops; and T9- farmyard manure (FYM) @10 Mg ha-1 for all crops in rotation. Results of the study revealed that rice and wheat yields were significantly greater under FYM than all other treatments. Treatments that did not receive P (T2, T3, T7, T8) and K (T2, T4) had considerably low wheat yield than treatments that received NPK (T5) and FYM (T9). The FYM lowered soil pH and improved soil organic matter (SOM), total nitrogen (TN), available phosphorus (P), and exchangeable potassium (K) contents than other treatments. Management practices that ensure nutrient supply can increase crop yield and improve soil fertility status.Int. J. Appl. Sci. Biotechnol. Vol 5(1): 42-50

scholarly journals Сучасний стан забезпеченості ґрунтів Полтавської області ґумусом (органічною речовиною)

2013 ◽  
pp. 84-88
Author(s):  
В. В. Коваль ◽  
В. О. Наталочка ◽  
С. К. Ткаченко ◽  
О. В. Міненко
Keyword(s):  
Soil Fertility ◽  
Agricultural Land ◽  
Average Content ◽  
Long Term Studies

Наведено результати багаторічних досліджень і узагальнено сучасний стан родючості земель сіль-ськогосподарського призначення Полтавської області. Проаналізовано динаміку забезпечення ґрунтів ґумусом (органічною речовиною) й надані рекомендації щодо подальшого їх призупинення деградації та відновленню. Лабораторними дослі-дженнями протягом 2001–2010 років визначено, що інтенсивна, науково необґрунтована система землеробства призводить до більш високих темпів втрат ґумусу. Вміст ґумусу в області за два останні тури обстеження знизився. За даними VIII туру обстеження, середній вміст його стано-вить 3,39 %, проти 3,26 % у IX турі, тобто змен-шився на 0,13 абсолютних відсотка. Визначено, що навіть за комплексного підходу внесення органіч-них речовин баланс рівноваги елементів живлення в ґрунті порушується. І тільки застосування ком-плексу органічних і мінеральних добрив та наси-чення сівозміни бобовими культурами (соя, горох, багаторічні трави), дотримання науково обґрун-тованої системи землеробства дає змогу підвищити якість земель. The publication presents the results of long-term studies and summarizes the current condition of soil fertility of agricultural land in Poltava Region.  The dynamics of providing soils of the Poltava area with the boron is analyzed and the recommendations in relation to their further stopping degradation and to renewal is given. During 2001–2010 laboratory researches detected, that content of the boron in soils of area for two last rounds of inspection did not change. According to the information of the VIII round of inspection, the average content of the boron is made by 1,05 mgs/kg of soil, against a 1,11 mg/kg in the IX round.

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