Influence of Crop Density and Weeding Frequency on Crop Growth and Grain Yield in Wheat
Influence of seed rates at 100, 125, 150 and 175 kg/ha and four weeding frequencies Wo (no weeding), Wi (weeding after 20 days of sowing), W2 (weeding after 20 and 40 days of sowing) and (weeding after 20, 40 and 60 days of sowing) on growth and yield of wheat were studied. The major weeds species...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Universiti Putra Malaysia Press
1998
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3675/1/Influence_of_Crop_Density_and_Weeding_Frequency_on.pdf |
| Summary: | Influence of seed rates at 100, 125, 150 and 175 kg/ha and four weeding frequencies Wo (no weeding), Wi
(weeding after 20 days of sowing), W2 (weeding after 20 and 40 days of sowing) and (weeding after 20, 40
and 60 days of sowing) on growth and yield of wheat were studied. The major weeds species were Chenopodium
album L., Cynodon dactylon (L) Pers, Dactyloctenium aegyptium L. and Vicia sativa L. The highest grain yield
per hectare, panicle length, and filled grains/panicle were obtained with the seeding rate of 125 kg/ha. The lowest
grain yield (3.11 t/ha) with minimum effective tillers/plant, panicle length and filled grains/panicle were
produced by the highest seed rate (175 kg/ha). The plant population per meter square was significantly influenced
by seed rates. Weeding at 20 and 40 days after sowing (W) gave the highest grain and straw yields along with
highest effective tillers/plant, panicle length, and filled grains/panicle. On the other hand no weeding treatment
gave the lowest grain and straw yields, effective tillers/plant, panicle length and filled grains/panicle. The critical
period of weed competition was between 20 and 40 days after sowing. High seed rate with three times weeding
(W) decreased weed dry weight/m2 significantly. |
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