Assessment of the contribution of tied ridges and farmyard manure application to sorghum production in semi-arid areas of Tanzania

2007 ◽  
pp. 723-730
Author(s):  
A.K. Kabanza ◽  
F.B.R. Rwehumbiza
Keyword(s):  
Farmyard Manure ◽  
Arid Areas ◽  
Manure Application ◽  
Sorghum Production ◽  
Semi Arid

Farmers’ perceptions of sorghum production constraints and Striga control practices in semi-arid areas of Tanzania

2016 ◽  
Vol 63 (2) ◽  
pp. 146-156 ◽  
Author(s):  
Emmanuel Mrema ◽  
Hussein Shimelis ◽  
Mark Laing ◽  
Tulole Bucheyeki
Keyword(s):  
Arid Areas ◽  
Production Constraints ◽  
Sorghum Production ◽  
Semi Arid

scholarly journals EFFECT OF CONSERVATION AGRICULTURE ON MAIZE YIELD IN THE SEMI-ARID AREAS OF ZIMBABWE

2013 ◽  
Vol 50 (2) ◽  
pp. 159-177 ◽  
Author(s):  
J. NYAMANGARA ◽  
K. NYENGERAI ◽  
E. N. MASVAYA ◽  
R. TIRIVAVI ◽  
N. MASHINGAIDZE ◽  
...  
Keyword(s):  
Soil Type ◽  
Dose Range ◽  
Conservation Agriculture ◽  
Rainfall Amount ◽  
Rainfall Regime ◽  
Arid Areas ◽  
N Application ◽  
Yield Performance ◽  
Manure Application ◽  
Semi Arid

SUMMARYGlobally, a range of agronomic factors have been reported to have an impact on the performance of conservation agriculture (CA) and often determine its performance in relation to conventional agriculture (CONV). To assess this performance in Zimbabwe, 48 CA experiments were conducted by the International Crops Research Institute for the Semi-Arid Tropics in the semi-arid areas of southern Zimbabwe from 2004 to 2010, to calculate the weighted mean difference (WMD) through meta-analytical methods. The two CA practices, planting basins (Basins) and ripper tillage (Ripper), were compared with CONV. It was hypothesised that CA results improved yield compared with CONV and that the effect of CA practices on yield is affected by soil type, rainfall amount and distribution and selected management practices, which included rates of inorganic fertilisers and manures and mulching. Basins were superior to CONV in 59% of the experiments and the overall effect was significant (p < 0.001). The effect of Ripper was non-significant. The hypothesis that CA practices result in improved maize grain yield over CONV was accepted for Basins. The WMD for experiments conducted on sandy soils was 0.365 t ha−1 for Basins and 0.184 t ha−1 for Ripper, and in both cases was significant (p < 0.05). For clay soils, only the WMD for Basins was significant. A higher rainfall regime (500–830 mm) resulted in a lower WMD for Basins (0.095 t ha−1) and Ripper (0.105 t ha−1) compared with 0.151 t ha−1 for Basins and 0.110 t ha−1 for Ripper under lower rainfall (320–500 mm). The overall effect of Basins under the higher rainfall regime was not significant. There was better yield performance for Basins when the rainfall was well distributed; the reverse was noted for the Ripper. The application of 10–30 kg ha−1 of N (micro-dose range) resulted in a higher WMD for Basins than zero N application. Without N application, the WMD of Basins was not significant. For zero manure application in Basins, the WMD was 0.043 t ha−1 compared with 0.159 t ha−1 when manure was applied. The application of mulch depressed the WMD in Basins by 44% and Ripper by 89%. The hypothesis that yield performance under CA is influenced by soil type, rainfall amount and distribution, inorganic fertiliser and manure application was accepted.

Environmental control of germination and dormancy of seeds of two cytotypes of Lygeum spartum L., a perennial grass of semi-arid and arid areas in Algeria

2010 ◽  
Vol 36 (1) ◽  
pp. 89-98 ◽  
Author(s):  
Abderazak Djabeur ◽  
Meriem Kaid-Harche ◽  
Daniel Côme ◽  
Françoise Corbineau
Keyword(s):  
Environmental Control ◽  
Perennial Grass ◽  
Arid Areas ◽  
Semi Arid

Loosely coupled SaltMod for simulating groundwater and salt dynamics under well-canal conjunctive irrigation in semi-arid areas

2017 ◽  
Vol 192 ◽  
pp. 209-220 ◽  
Author(s):  
Wei Mao ◽  
Jinzhong Yang ◽  
Yan Zhu ◽  
Ming Ye ◽  
Jingwei Wu
Keyword(s):  
Arid Areas ◽  
Loosely Coupled ◽  
Semi Arid

The use ofin vitrogas production to evaluate rumen fermentation of leaves of 24 browse species indigenous to semi-arid areas of Zimbabwe

1998 ◽  
Vol 22 ◽  
pp. 238-240
Author(s):  
L. R. Ndlovu ◽  
L. Hove
Keyword(s):  
Woody Plants ◽  
Nutritive Value ◽  
Gas Production ◽  
Arid Areas ◽  
Chemical Methods ◽  
Tropical Regions ◽  
Biological Assays ◽  
Browse Species ◽  
Semi Arid

Browse species are important food resources in semi-arid areas, especially during the dry season when the nutritive value of grass is at its lowest. However, browse plants often contain secondary plant compounds which limit their nutritive value. Proanthocyanidins (PAs) (also called condensed tannins) and related flavonoids are a common constituent of woody plants in tropical regions (Mangan, 1988). PAs cause a bitter and astringent taste which lowers food palatability and they also lower the digestibility of proteins and carbohydrates (Jacksonet al., 1996). PAs also interfere with current chemical methods that are used for estimating nutritive value of foods (Reed, 1995). Biological assays, especially ,in vitrotechniques, have a potential to reflect better the nutritive value of foods that contain PAs. Thein vitrogas production technique has been found to reliably predict the nutritive value of temperate forages (Makkaret al., 1996). There has been limited research on its efficacy with tropical forages. The experiment reported here was conducted to test the hypothesis that gas production of tropical browse species reflects their content of fibre, protein and/or PAs.

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