Abstract
African Crop Science Journal Vol.5. No.2, pp. 197-206 1997 Maize and sorghum yields under tied ridges of fertilised sandy soils in semi-arid south-east lowveld of Zimbabwe E. Z. NYAKATAWA, M. BROWN and D. MARINGA Code Number: CS96057 Sizes of Files: Text: 26.5K Graphics: Tables (gif) - 64.7K ABSTRACT Growing maize and sorghum in furrows of 1.0 m and 1.5 m wide tied ridges with either 100 kg or 200 kg compound D ha^-1 (8:14:7 NPK, basal fertilizer) + 50 kg N ha^-1 top dressing were compared to the traditional farmers' practice of growing these crops on flat land without fertilizer. The crops were grown under rainfed conditions on sandy soils of Matibi 1 and Chivi communal areas in semi-arid agro-ecological regions IV and V in the south-east lowveld of Zimbabwe, from 1987/88 to 1989/90. Grain yield of maize in 1.0 m wide tied ridges was increased significantly by 22 to 85% over sowing on flat land and sorghum grain yield was increased by 18%. Application of inorganic fertilizer resulted in significant yield increases of 35 to 115% in maize grain, 59 to 200% in sorghum grain, 27 to 96% in maize stover and 63 to 161% in sorghum stover, compared to no fertilizer application. The benefits of growing crops in tied ridges and the incremental gross margins in Z$ ha^-1 of fertilizer application were more associated with monthly rainfall distribution than with the total summer rainfall. Key Words: Grain yield, incremental gross margins, inorganic fertilizer, rainfed, sandy soils, soil fertility, stover yield, tied ridges RESUME La culture de maos et de sorgho en sillons espaces de 1.0 et 1.5 m avec des billons lies et une fertilisation de 100 kg ou 200 kg par ha du compose D (8:14:7 NPK, engrais de fond) avec 50 kg N/ha d'engrais de couverture a ete comparee avec la culture traditionelle des fermiers i.e une culture sur terre plate sans engrais. La culture etait etablie de 1987/1988 jusque 1989/1990 dans de conditions de precipitation naturelle et sur des sols sableux de Matibil et des aires de la commune Chivi dans des regions agro-ecologiques semi arides IV et V dans les plaines du sud est de Zimbabwe. Le rendement des grains de maos sur des billons de 1,0 m augmentait significativement de 22 jusque 85% par rapport la culture sur terre plate, alors que le rendement de grains de sorgho augmentait de 18%. Une application d'engrais inorganique donnait une augmentation significative du rendement de grains de maos de 35 jusque 115%, de grains de sorgho de 59 jusque 200%, de fourrage de maos de 27 jusque 96% et de fourrage de sorgho de 63 jusqu' e 161%, par rapport e la culture sans engrais. L'avantage des cultures en billons lies et les marges beneficaires en Z$ pour l'engrais Etaient plutot associes la distribution de la prEcipitation mensuelle qu' e la precipitation totale en saison pluvieuse. Mots Cles: Rendement en grains, marges beneficaires, engrais inorganique, precipitation naturelle, sols sableux, fertilite du sol, rendement de fourrage, billons lies Copyright 1997 The African Crop Science Society
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Claims 8
Claim · model-written summary
Maize grain yield in 1.0 m tied ridges increased by 22 to 85% over flat sowing.
- Treatment
- 1.0 m wide tied ridgese0
- Outcome
- Grain yielde0
- Direction
- increasede0
- Value
- 22 to 85%e0
- Comparator
- sowing on flat lande0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield of maize in 1.0 m wide tied ridges was increased significantly by 22 to 85% over sowing on flat land”
Claim · model-written summary
Sorghum grain yield increased by 18% under tied ridges.
- Treatment
- tied ridgest0
- Outcome
- sorghum grain yielde0
- Direction
- increasede0
- Value
- 18%e0
- Comparator
- sowing on flat lande1
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum grain yield was increased by 18%”
e1“Grain yield of maize in 1.0 m wide tied ridges was increased significantly by 22 to 85% over sowing on flat land”
t0“sorghum yields under tied ridges”
Claim · model-written summary
Fertilizer increased maize grain yield by 35 to 115%.
- Treatment
- inorganic fertilizere0
- Outcome
- maize graine0
- Direction
- yield increasese0
- Value
- 35 to 115%e0
- Comparator
- no fertilizer applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of inorganic fertilizer resulted in significant yield increases of 35 to 115% in maize grain, 59 to 200% in sorghum grain, 27 to 96% in maize stover and 63 to 161% in sorghum stover, compared to no fertilizer application.”
Claim · model-written summary
Fertilizer increased sorghum grain yield by 59 to 200%.
- Treatment
- inorganic fertilizere0
- Outcome
- sorghum graine0
- Direction
- yield increasese0
- Value
- 59 to 200%e0
- Comparator
- no fertilizer applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of inorganic fertilizer resulted in significant yield increases of 35 to 115% in maize grain, 59 to 200% in sorghum grain, 27 to 96% in maize stover and 63 to 161% in sorghum stover, compared to no fertilizer application.”
Claim · model-written summary
Fertilizer increased maize stover yield by 27 to 96%.
- Treatment
- inorganic fertilizere0
- Outcome
- maize stovere0
- Direction
- yield increasese0
- Value
- 27 to 96%e0
- Comparator
- no fertilizer applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of inorganic fertilizer resulted in significant yield increases of 35 to 115% in maize grain, 59 to 200% in sorghum grain, 27 to 96% in maize stover and 63 to 161% in sorghum stover, compared to no fertilizer application.”
Claim · model-written summary
Fertilizer increased sorghum stover yield by 63 to 161%.
- Treatment
- inorganic fertilizere0
- Outcome
- sorghum stovere0
- Direction
- yield increasese0
- Value
- 63 to 161%e0
- Comparator
- no fertilizer applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of inorganic fertilizer resulted in significant yield increases of 35 to 115% in maize grain, 59 to 200% in sorghum grain, 27 to 96% in maize stover and 63 to 161% in sorghum stover, compared to no fertilizer application.”
Claim · model-written summary
Tied-ridge benefits were more associated with monthly rainfall distribution than total summer rainfall.
- Outcome
- benefits of growing crops in tied ridgese0
- Direction
- more associatede0
- Qualifier
- monthly rainfall distributione0
- Comparator
- total summer rainfalle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The benefits of growing crops in tied ridges and the incremental gross margins in Z$ ha^-1 of fertilizer application were more associated with monthly rainfall distribution than with the total summer rainfall.”
t0“Maize and sorghum”
Claim · model-written summary
Incremental fertilizer gross margins were more associated with monthly rainfall distribution than total summer rainfall.
- Outcome
- incremental gross margins in Z$ ha^-1e0
- Direction
- more associatede0
- Qualifier
- monthly rainfall distributione0
- Comparator
- total summer rainfalle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The benefits of growing crops in tied ridges and the incremental gross margins in Z$ ha^-1 of fertilizer application were more associated with monthly rainfall distribution than with the total summer rainfall.”
t0“Maize and sorghum”
The same questions in other papers
fertilization · organism · Zea mays (maize)Results differ
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- negative
- no effect
- no effect
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See all 162 papers →fertilization · organism · SorghumPositive and negative results
10 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
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See all 13 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.