| Titre : |
Crop management: nutrients, weeds and rain |
| Type de document : |
texte imprimé |
| Auteurs : |
M.D. Clegg, Auteur |
| Année de publication : |
1996 |
| Importance : |
p 91-97 |
| Langues : |
Anglais (eng) |
| Catégories : |
SCIENCES AGRICOLES
|
| Mots-clés : |
GESTION DES CULTURES NUTRIMENTS |
| Résumé : |
Data derived from experiments with sorghum and pearl millet in USA, relative to the amounts of several nutrients that are taken up by different crops, show the effect of added nitrogen and the removal of weeds on yield and water-use efficiency (WUE). For a sorghum yield of 2t/ha, the crop’s annual requirements in t/ha are 60N, 20P and 60K. Rotation with soybean increased the yields of sorghum and pearl millet and additional nitrogen benefits yields. But the cultivation practices of removing competiive weeds and increasing WUE are shown to increase the yields of both crops whether they are grown continuously or in rotation with soybean. WUE gains of between 2.9 and 7.5 kg/ha /mm are reported and complete weed control was found to increase WUE on average by 10 kg/ha/mm. It is concluded that, mainly through the more efficient use of rain, a single application of nonrenewable nutrients and effective weed control can double or triple crop yields. |
| Numéro du document : |
A 10433/F00 132 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
SCIENCES ET PRODUCTION VEGETALES |
| Bull2 (Theme secondaire) : |
SYSTEMES ET MODES DE CULTURE |
Crop management: nutrients, weeds and rain [texte imprimé] / M.D. Clegg, Auteur . - 1996 . - p 91-97. Langues : Anglais ( eng)
| Catégories : |
SCIENCES AGRICOLES
|
| Mots-clés : |
GESTION DES CULTURES NUTRIMENTS |
| Résumé : |
Data derived from experiments with sorghum and pearl millet in USA, relative to the amounts of several nutrients that are taken up by different crops, show the effect of added nitrogen and the removal of weeds on yield and water-use efficiency (WUE). For a sorghum yield of 2t/ha, the crop’s annual requirements in t/ha are 60N, 20P and 60K. Rotation with soybean increased the yields of sorghum and pearl millet and additional nitrogen benefits yields. But the cultivation practices of removing competiive weeds and increasing WUE are shown to increase the yields of both crops whether they are grown continuously or in rotation with soybean. WUE gains of between 2.9 and 7.5 kg/ha /mm are reported and complete weed control was found to increase WUE on average by 10 kg/ha/mm. It is concluded that, mainly through the more efficient use of rain, a single application of nonrenewable nutrients and effective weed control can double or triple crop yields. |
| Numéro du document : |
A 10433/F00 132 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
SCIENCES ET PRODUCTION VEGETALES |
| Bull2 (Theme secondaire) : |
SYSTEMES ET MODES DE CULTURE |
|
Crop management: nutrients, weeds and rain
