Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands
Three months after planting cocoa under Leucaena leucocephala shade trees established on a Themeda australis grassland alluvial plain, some cocoa seedlings had died, others were stunted, and their leaves were chlorotic with marginal necrosis. Deficiencies of nitrogen and possibly sulphur were suspected. A field trial compared effects of ammonium sulphate with equivalent amounts of S and N as gypsum and urea, separately and together. Nitrogen alone aggravated the condition and responses to sulphur alone were small. Good responses were obtained on plants receiving either formulation providing both N and S
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1975
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| Subjects: | THEOBROMA CACAO, PLANTULAS, ENFERMEDADES CARENCIALES, NITROGENO, AZUFRE, DEFICIENCIA DE MINERALES, SUELO ALUVIAL, PLANTAS DE SOMBRA, LEUCAENA LEUCOCEPHALA, THEMEDA AUSTRALIS, |
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KOHA-OAI-BVE:668192020-02-03T21:33:56ZDeficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands 85503 Leach, B.J. 69224 Friend, D. 56659 Chase, L.D.C. 1975Three months after planting cocoa under Leucaena leucocephala shade trees established on a Themeda australis grassland alluvial plain, some cocoa seedlings had died, others were stunted, and their leaves were chlorotic with marginal necrosis. Deficiencies of nitrogen and possibly sulphur were suspected. A field trial compared effects of ammonium sulphate with equivalent amounts of S and N as gypsum and urea, separately and together. Nitrogen alone aggravated the condition and responses to sulphur alone were small. Good responses were obtained on plants receiving either formulation providing both N and SThree months after planting cocoa under Leucaena leucocephala shade trees established on a Themeda australis grassland alluvial plain, some cocoa seedlings had died, others were stunted, and their leaves were chlorotic with marginal necrosis. Deficiencies of nitrogen and possibly sulphur were suspected. A field trial compared effects of ammonium sulphate with equivalent amounts of S and N as gypsum and urea, separately and together. Nitrogen alone aggravated the condition and responses to sulphur alone were small. Good responses were obtained on plants receiving either formulation providing both N and STHEOBROMA CACAOPLANTULASENFERMEDADES CARENCIALESNITROGENOAZUFREDEFICIENCIA DE MINERALESSUELO ALUVIALPLANTAS DE SOMBRALEUCAENA LEUCOCEPHALATHEMEDA AUSTRALISTropical Agriculture (Trinidad y Tobago) |
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THEOBROMA CACAO PLANTULAS ENFERMEDADES CARENCIALES NITROGENO AZUFRE DEFICIENCIA DE MINERALES SUELO ALUVIAL PLANTAS DE SOMBRA LEUCAENA LEUCOCEPHALA THEMEDA AUSTRALIS THEOBROMA CACAO PLANTULAS ENFERMEDADES CARENCIALES NITROGENO AZUFRE DEFICIENCIA DE MINERALES SUELO ALUVIAL PLANTAS DE SOMBRA LEUCAENA LEUCOCEPHALA THEMEDA AUSTRALIS |
| spellingShingle |
THEOBROMA CACAO PLANTULAS ENFERMEDADES CARENCIALES NITROGENO AZUFRE DEFICIENCIA DE MINERALES SUELO ALUVIAL PLANTAS DE SOMBRA LEUCAENA LEUCOCEPHALA THEMEDA AUSTRALIS THEOBROMA CACAO PLANTULAS ENFERMEDADES CARENCIALES NITROGENO AZUFRE DEFICIENCIA DE MINERALES SUELO ALUVIAL PLANTAS DE SOMBRA LEUCAENA LEUCOCEPHALA THEMEDA AUSTRALIS 85503 Leach, B.J. 69224 Friend, D. 56659 Chase, L.D.C. Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands |
| description |
Three months after planting cocoa under Leucaena leucocephala shade trees established on a Themeda australis grassland alluvial plain, some cocoa seedlings had died, others were stunted, and their leaves were chlorotic with marginal necrosis. Deficiencies of nitrogen and possibly sulphur were suspected. A field trial compared effects of ammonium sulphate with equivalent amounts of S and N as gypsum and urea, separately and together. Nitrogen alone aggravated the condition and responses to sulphur alone were small. Good responses were obtained on plants receiving either formulation providing both N and S |
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| topic_facet |
THEOBROMA CACAO PLANTULAS ENFERMEDADES CARENCIALES NITROGENO AZUFRE DEFICIENCIA DE MINERALES SUELO ALUVIAL PLANTAS DE SOMBRA LEUCAENA LEUCOCEPHALA THEMEDA AUSTRALIS |
| author |
85503 Leach, B.J. 69224 Friend, D. 56659 Chase, L.D.C. |
| author_facet |
85503 Leach, B.J. 69224 Friend, D. 56659 Chase, L.D.C. |
| author_sort |
85503 Leach, B.J. |
| title |
Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands |
| title_short |
Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands |
| title_full |
Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands |
| title_fullStr |
Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands |
| title_full_unstemmed |
Deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of Guadalcanal, Solomon Islands |
| title_sort |
deficiency of sulphur and nitrogen in seedling cocoa on an alluvial grassland of guadalcanal, solomon islands |
| publishDate |
1975 |
| work_keys_str_mv |
AT 85503leachbj deficiencyofsulphurandnitrogeninseedlingcocoaonanalluvialgrasslandofguadalcanalsolomonislands AT 69224friendd deficiencyofsulphurandnitrogeninseedlingcocoaonanalluvialgrasslandofguadalcanalsolomonislands AT 56659chaseldc deficiencyofsulphurandnitrogeninseedlingcocoaonanalluvialgrasslandofguadalcanalsolomonislands |
| _version_ |
1756056891180449792 |