Abstract
African Crop Science Journal, Vol. 4. No. 4, pp. 441-451, 1996 Reduction of P fertilizer requirement using lime and Mucuna on high P-sorption soils of NW Cameroon. * C. YAMOAH, M., NGUEGUIM C., NGONG and D.K.W DIAS (Received 12 October, 1996; accepted 7 December, 1996) *This article is contribution from the IITA-NCRE USAID-supported Project in Cameroon. "Center for Sustainable Agric. Systems, Dept. of Agronomy, 225 Keim Hall, Univ. of Nebraska-Lincoln, Lincoln NE 68583-0949, USA. Code Number: CS96085 Sizes of Files: Text: 40K Graphics: No associated graphics files ABSTRACT Soil acidity and high phosphorus (P) fixation are real problems in the Highlands of Central and Eastern Africa. Phosphatic fertilizers are imported and costly for the average farmer. We used lime and Mucuna green manure to reduce fertilizer P requirement of traditional food crops in NW Camcroon. Lime and phosphorus significantly improved stand count, root and stem weights as well as yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.) in three consecutive cropping seasons. Liming was most effective at low P rates and its effect on yield diminished with increasing P fertilization. Likewise, high P was unnecessary when lime was applied. Mucuna green manuring behaved similarly to liming and reduced maize P requirement by between 45 and 83%. Additionally, liming raised soil calcium (Ca), pH, effective cation exchange capacity (ECEC), and lowered exchangeable acidity (Al+H) as well as Al saturation. Consequently, maize and bean yields correlated positively (P{0.01) with pH, ECEC and exchangeable Ca but related inversely (P{0.01) with total acidity and Al saturation. Liming at 2 t ha^-1 was observed to be uneconomical at the current prices of lime and P fertilizer. Thus, our results suggest that farmers could use either a much lower rate of lime or Mucuna green manuring with less than 85 kg ha^-1 P fertilizer to sustain production on acid infertile soils in NW Cameroon. Key Words: Acidity, Al saturation, liming, green manuring, Solanum tuberosum, Zea mays RESUME L'acidite du sol et la haute fixation du Phosphote (P) sont des veritables problemes des regions montagneuses de l'Afrique Centrale et de l'Est. Les engrais phosphoriques sont importes et sont tres couteux aux fermiers de la classe mayenne. Nous avous utilise des chaux et fumiers verts "Mucuna" pour reduire les exigences des engrais P des cultures traditionnelles au NW Cameroun. Les chaux et les engrais du phosphore ont cousiderablement ameliores la qualite des racines, les poids des tiges ainsi que les rendements du mais (Zea mays L.), l'haricot (Phaseolus spp.), et la pomme de terre (Solanum tuberosum) dans trois saisons des cultures consecutives. L'utilisation du chaux etait la plus effective a un faible niveau de taux et son effet sur le rendement a diminue avec l'augmentation d'engrais. De meme, la haute densite du phospore (P) n'etait pas necessaire apres l'utilisation des chaux. Les fumiers verts "Mucuna" ont remplace les chaux et reduit les besoins d'utilisation des phosphates pour le mays de 45 a 83%. En plus, l'utilisation des chaux a augmente la capacite effective d'echange sol calcium (Ca), pH, (ECEC) et a diminue la possibilite d'echange de l'acidite (Al + H) aussi bien que la saturation Al. Par cousequent, les rendements du mais et de l'haricot ont des correlations positives (P{0.01) avec pH, ECEC et echangeable Ca mais a l'inverse (P{0.01) avec l'acidite totale et la saturation Al. Les chauf a 2t ha^-1 etait constate etant moins economique par rapport aux prix actuels des chaux et des engrais P. Ainsi, d'apres nos resultats nous aimerions suggerer aux fermiers d'utiliser soit un taux moins eleve des chaux ou des engrais verts "Mucuna" avec moins de 85 kgs ha^-1 d'engrais P en vue de maintenir la production sur les sols infertiles d'acides au NW Cameroun. Mots Cles: Acidite, saturation Al, l'utilisation des chaux, engrais verts, Solanum tuberosum, Zea mays Copyright 1996 African Crop Science Society
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Lime and phosphorus significantly improved maize stand count, root and stem weights, and yield.
- Treatment
- Lime and phosphoruse0
- Outcome
- stand count, root and stem weights as well as yieldse0
- Direction
- improvede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime and phosphorus significantly improved stand count, root and stem weights as well as yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.)”
Claim · model-written summary
Lime and phosphorus significantly improved bean stand count, root and stem weights, and yield.
- Taxon
- beane0
- Treatment
- Lime and phosphoruse0
- Outcome
- stand count, root and stem weights as well as yieldse0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Lime and phosphorus significantly improved stand count, root and stem weights as well as yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.)”
Claim · model-written summary
Lime and phosphorus significantly improved Irish potato stand count, root and stem weights, and yield.
- Taxon
- Irish potatoe0
- Treatment
- Lime and phosphoruse0
- Outcome
- stand count, root and stem weights as well as yieldse0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Lime and phosphorus significantly improved stand count, root and stem weights as well as yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.)”
Claim · model-written summary
Liming raised yield most at low phosphorus rates; its yield effect declined as phosphorus rose.
- Treatment
- Liminge0
- Outcome
- effect on yielde0
- Direction
- diminishede0
- Comparator
- increasing P fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming was most effective at low P rates and its effect on yield diminished with increasing P fertilization”
t0“Mucuna”
e1“yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.)”
Claim · model-written summary
Mucuna green manure reduced maize phosphorus requirement by 45 to 83%.
- Treatment
- Mucuna green manuringe0
- Outcome
- maize P requiremente0
- Direction
- reducede0
- Value
- between 45 and 83%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mucuna green manuring behaved similarly to liming and reduced maize P requirement by between 45 and 83%”
Claim · model-written summary
Liming raised soil calcium, pH and effective cation exchange capacity.
- Treatment
- liminge0
- Outcome
- soil calcium (Ca), pH, effective cation exchange capacity (ECEC)e0
- Direction
- raisede0
Not reportedTaxonComparator
Verbatim
e0“liming raised soil calcium (Ca), pH, effective cation exchange capacity (ECEC)”
Claim · model-written summary
Liming lowered exchangeable acidity and aluminium saturation.
Not reportedTaxonComparator
Verbatim
e0“liming raised soil calcium (Ca), pH, effective cation exchange capacity (ECEC), and lowered exchangeable acidity (Al+H) as well as Al saturation”
Claim · model-written summary
Maize yield correlated positively with pH, ECEC and exchangeable calcium.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize and bean yields correlated positively (P{0.01) with pH, ECEC and exchangeable Ca”
Claim · model-written summary
Bean yield correlated positively with pH, ECEC and exchangeable calcium.
Verbatim
e0“maize and bean yields correlated positively (P{0.01) with pH, ECEC and exchangeable Ca”
Claim · model-written summary
Maize yield related inversely to total acidity and aluminium saturation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize and bean yields correlated positively (P{0.01) with pH, ECEC and exchangeable Ca but related inversely (P{0.01) with total acidity and Al saturation”
Claim · model-written summary
Bean yield related inversely to total acidity and aluminium saturation.
Verbatim
e0“maize and bean yields correlated positively (P{0.01) with pH, ECEC and exchangeable Ca but related inversely (P{0.01) with total acidity and Al saturation”
Claim · model-written summary
Liming at 2 t ha^-1 was uneconomical at current lime and phosphorus fertilizer prices.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming at 2 t ha^-1 was observed to be uneconomical at the current prices of lime and P fertilizer”
t0“Mucuna”
e1“yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.)”
Claim · model-written summary
The authors recommend lower lime rates or Mucuna manure with less than 85 kg ha^-1 phosphorus fertilizer to sustain production.
- Outcome
- a much lower rate of lime or Mucuna green manuring with less than 85 kg ha^-1 P fertilizere0
- Setting
- NW Cameroone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“farmers could use either a much lower rate of lime or Mucuna green manuring with less than 85 kg ha^-1 P fertilizer to sustain production on acid infertile soils in NW Cameroon”
t0“Mucuna”
e1“yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.)”
The same questions in other papers
Mucuna · organism · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
lime · soil: chemistry · Zea mays (maize)Results differ
35 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- no effect
- negative
38 papers more in this group
See all 42 papers →fertilization · organism · Zea mays (maize)Results differ
136 papers in the same direction as this paper · 20 in the opposite direction · 5 reporting no difference from an alternative
- negative
- no effect
- no effect
158 papers more in this group
See all 162 papers →lime · quality: sugar starch · Zea mays (maize)Positive and negative results
15 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
14 papers more in this group
See all 18 papers →phosphorus · yield · Phaseolus vulgaris (common bean)Positive and negative results
95 papers in the same direction as this paper · 20 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- negative
114 papers more in this group
See all 118 papers →lime · yield · Zea mays (maize)Positive and negative results
184 papers in the same direction as this paper · 31 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- no effect
215 papers more in this group
See all 219 papers →phosphorus · yield · Zea mays (maize)Positive and negative results
548 papers in the same direction as this paper · 69 in the opposite direction · 9 reporting no difference from an alternative
- no effect
- no effect
- negative
623 papers more in this group
See all 627 papers →lime · yield · Phaseolus vulgaris (common bean)Results agree
38 papers in the same direction as this paper
- positive
- positive
- positive
35 papers more in this group
See all 39 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.