S.3 Agriculture Holiday Work 2020 Caltec S.3

S.3 AGRICULTURE TEST ON WEEDS 2020. 1. A weed can best be described as; A: a plant that grows very fast to suppress others. B: a plant that grows where it is not wanted. C: a plant that grows on the marshy part of the field. D: a plant with only negative effects. 2. Weeds are said to lower the carrying capacity of pastures since; A: their volume increases steadily in the pastures due to selective feeding. B: they cover the soil effectively. C: they provide food for wild animals. D: some will be picked by the farmer as vegetables. 3. An example of a weed with allelophatic effects is; A: Black jack B: Wild finger millet C: Wandering Jew D: Striga. 4. Wild onions are an example of weeds that lower the quality of farm products since they; A: stick on cotton lint B: make farm operations difficult C: impart a bad smell in milk when they are eaten by cattle. D: are poisonous to livestock. 5. Which one of the following weeds is poisonous to livestock? A: Wild finger millet. B: Black jack C: Sodom apple D: Goat weed 6 .The type of weeds that interfere with development of root crops are those; A: that produces many seeds B: with Rhizomous underground parts. C: that spreads rapidly over large areas. D: that get nutrients directly from plant roots 7. Weeds that cover the soil rapidly can be beneficial since they; A: can be eaten by animals. B: encourage growth of root crops C: do not compete with crops for light D: control erosion and reduce water loss from the soil through evaporation. 8. Weeds are more successful in the field than crops by A: being alternative hosts of crop pests and diseases B: when they are well rotten …