Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Charles F. Yamoah"'
Publikováno v:
Nutrient Cycling in Agroecosystems. 67:167-176
The Sudano–Sahelian agroecological zone is characterized by low and variable rainfall regimes and P deficiency. The present study complements previous research efforts and the objective was (i) to use the Newhall Simulation Model (NSM) to character
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7d8ef709ea026d301937942715a8d84
https://doi.org/10.1023/a:1025576414338
https://doi.org/10.1023/a:1025576414338
Trend and stability analyses of millet yields treated with fertilizer and crop residues in the Sahel
Publikováno v:
Field Crops Research. 75:53-62
Pearl millet (Penisetum glaucum (L.) R.Br.) is a major food crop grown on impoverished sandy soils in the Sahel. A 9-year long-term study was undertaken in the Sahel to test the hypothesis that integrated use of millet crop residues retained on farm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38b9f280aaaf3addd4f0aafd70f2b140
https://doi.org/10.1016/s0378-4290(02)00008-4
https://doi.org/10.1016/s0378-4290(02)00008-4
Publikováno v:
Agronomy Journal. 93:1337-1340
It has been commonly accepted that crop rotations reduce risk compared with monoculture systems. Quantifying this phenomenon requires that effects of yield stability on risk (positive or negative) arising from rotating crops be separated from other r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af0176f38d4b699d5a4e9b2cd3ec3d5b
https://doi.org/10.2134/agronj2001.1337
https://doi.org/10.2134/agronj2001.1337
Publikováno v:
Biological Agriculture & Horticulture. 19:219-230
Increasing rural populations and the associated agricultural intensification and reduction in fallow periods of cropping systems in Senegal may be degrading soils. This may be related to the per capita decrease in food production of the semi-arid Sub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86ba78ea3460eea6e0aeaf8e41e5f016
https://doi.org/10.1080/01448765.2001.9754926
https://doi.org/10.1080/01448765.2001.9754926
Publikováno v:
Agriculture, Ecosystems & Environment. 80:113-120
Crop performance in rainfed cropping systems generally is dependent on rainfall amount and distribution. The objective of this study was to analyze the long-term consequences of rainfall expressed as a standardized precipitation index (SPI) and ferti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d69f578bb2589469a5c349899ff6070
https://doi.org/10.1016/s0167-8809(00)00140-7
https://doi.org/10.1016/s0167-8809(00)00140-7
Publikováno v:
Biological Agriculture & Horticulture. 17:329-338
Soils of the groundnut (Arachis hypogaea) L. basin of Senegal are impoverished with low fertility and organic matter content. Previously, farmers maintained yields of millet (Pennisetum glaucum (L.) R. Br. and groundnut with subsidized inorganic fert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2f993a8d1282a4719b81b1170e85c12
https://doi.org/10.1080/01448765.2000.9754853
https://doi.org/10.1080/01448765.2000.9754853
Publikováno v:
Field Crops Research. 57:15-27
Cropping systems, nitrogen (N) fertilizer levels, and climate largely dictate patterns of N use and influence problems arising from N fertilization. Nitrogen use was assessed in cropping systems with a nitrogen removal-index (NRI), defined as the rat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42bb555162c775e04b3d68a425bab45b
https://doi.org/10.1016/s0378-4290(97)00109-3
https://doi.org/10.1016/s0378-4290(97)00109-3
Publikováno v:
Journal of Production Agriculture. 11:219-225
Crop rotation offers several advantages to improve farmers' systems worldwide. The positive attributes of rotations are usually dependent upon crop choices, cropping sequence, soil fertility management, and weather factors. Of these, weather is most
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a527ad5caf917adba0bc5fd289adc25d
https://doi.org/10.2134/jpa1998.0219
https://doi.org/10.2134/jpa1998.0219
Publikováno v:
Experimental Agriculture. 28:417-424
SUMMARYSustainable crop production on Rwandan oxisols is limited by widespread soil acidity caused by high levels of exchangeable aluminium. This study was designed to test the effectiveness of an indigenous lime material in counteracting the acidity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::123b5a5cd0a7a52168b46dc8fd9c7cf0
https://doi.org/10.1017/s0014479700020123
https://doi.org/10.1017/s0014479700020123
Publikováno v:
Agriculture, Ecosystems & Environment. 41:337-351
The physical and biological heterogeneity of the Northern Highlands of Rwanda has hampered the development and extension of new crop cultivars and new cultural practices for crop management as the performance of new cultivars and new technologies acr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50986a83f1052d6d93baf38efdb256c9
https://doi.org/10.1016/0167-8809(92)90120-z
https://doi.org/10.1016/0167-8809(92)90120-z