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Effect of planting method on establishment of Napier grass varieties.


Napier grass (Pennisetum purpureum Schum.) is extremely valuable in eastern Africa, but high biomass production is often limited by poor establishment. An experiment was carried out at Makerere University Agricultural Research Institute, Kabanyolo (MUARIK) to determine the effect of planting method on sprouting and survival of Napier cuttings for three varieties. Erect and prostrate planting methods were compared. During the period 10 to 52 days after planting, ILCA 16791 was superior in percentage sprouting, development of fully opened leaves and 10 to 15 cm long leaves, and consequently had the lowest percentage of plants failing to sprout. The erect planting method resulted in a slightly higher percentage of sprouted Napier cuttings, but, generally, planting method did not have a significant effect on sprouting, growth and plant survival. Survival varied significantly between seasons.

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Effect of hedgerow orientation on maize light interception and yield in black locust alleys.


An experiment was carried out in Ohio, USA, to verify whether north-south hedgerow orientation, and hence location of maize rows on the western or eastern sides within the alleys, would influence maize light interception and yield at higher latitudes. Compared to unpruned black locust hedges, pruning improved light availability to maize at ear height by 36%, and allowed 52% more light to penetrate to the 15 cm height of the maize plants. Maize plants on the second row from the unpruned hedges received more light than the first maize row, but this was reversed with hedge pruning, especially of light reaching the 15 cm height of the maize plants. The location of maize rows on the western or eastern sides within the north-south aligned alleys did not have a significant effect on photosynthetically active radiation available to the various maize rows in the alleys, neither on the ultimate grain yield and yield components. What is important is to prune the hedges when they have grown tall enough, not which side of the alleys the maize rows are located.

Key words

Soil moisture relations at the tree/crop interface in black locust alleys


A study was undertaken in Ohio to determine whether the presence of black locust hedgerows would increase water shortage on crop land. Water was applied to bare soil which had carried pure stand maize in the previous growing season, and to the previously established alley cropping plots, some of which had 100 cm deep below-ground fiberglass partitions to prevent root competition for soil moisture in the alleys. Direct soil evaporation was reduced by covering the soil with a black polyethylene sheet. Soil moisture remaining in the top 45 cm soil depth was monitored for 8 days. Soil 1 had a higher organic carbon content and contained more moisture than Soil 2, which had more gravel than Soil 1. In Soil 2 there was significantly less water in alleys without below-ground partitions than on bare soil. In alleys without below-ground partitions, the hedgerows reduced soil moisture content of the alleys without below-ground partitions, the hedgerows reduced soil moisture content of the alleys by about 8% on Soil 1 and 32% on Soil 2, after 8 days following water application. In the top 45 cm depth of Soil 1, the influence of the hedgerows in the same treatment was large within 76 cm of the hedgerows but declined farther inside the alleys. For Soil 2 which had more gravel in the lower soil layers, which prevented deep growth of black locust roots, the influence of the hedgerows was pronounced throughout the alleys but was also most marked within the 76 cm distance from the hedges.

Key words alley cropping - black locust - competition - hedgerows - location in alleys - soil moisture

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The importance of differences in maturity periods and stature in the sorghum/finger millet intercrops.


There are over 600 local vegetable species in Uganda; of these, Nakati and Bugga are most important. Unfortunately, their production is largely based on traditional practices. A survey was therefore conducted in central Uganda to document the indigenous practices, and to identify possible research interventions. The results indicated that the vegetables are predominantly grown by small

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More Articles ...

  1. Cowpea as a mixed crop. Trop Grain Legume Bulletin 30:2-8.
  2. Perspectives on hedgerow intercropping.Agroforestry systems 3(4):339-356
  3. Interactions at the tree/crop interface in the black locust/maize alley cropping system.
  4. Studies on intercropping sorghum with finger millet with special emphasis on genotype identification and mixture proportion.
  5. ICRAF Research Fellowships.1983/84 Final Report. ICRAF
  6. Trees and shrubs (Chapter 3). In Biodiversity Reports. Series 1-33 (Howard, P. and T. Davenport eds.)
  7. Effect of density of Bidenspilosa on the growth and yield of cowpea.
  8. The potential of joint production of Napier grass and food crops
  9. Effect of weeds on growth and yields of cowpeas. In: James Onsando (ed.). Proceedings of the 15th biannual conference of the Weed Science Society for East Africa.
  10. Ficusnatalensis in banana plantations. A review of research needs. In: Proceedings of the 14th Conference of the Soil Science Society of East Africa (SSEA).
  11. Status of, potential for and constraints for agroforestry education at Makerere University.p.17-18
  12. Below-ground interactions in alley cropping. Appraisal of first-year observations on maize grown in black locust (Robiniapseudoacacia) alleys.
  13. Some aspects of competition for environmental resources in alley cropping.
  14. The relevance of cereal/legume mixed crops in Ugandan agriculture.
  15. Hybridization between redtail (Cercopithecus ascanius schimidti) and blue monkeys (Cercopithecus mitis Stuhlmanni) monkeys in the Kibale Forest, Uganda.
  16. Elephants, selective logging and forest regeneration in the Kibale Forest, Uganda.
  17. Assessing fern diversity: relative species richness and its environmental correlates in Uganda.
  18. Complementarity and the use of indicator groups for reserve selection in Uganda.

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