7. a) Write any five differences between manure and fertilizer.
(OR)
b) (i) Define harvesting.
(ii) Explain the various methods employed to harvest crops.
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Manures and fertilizers are soil additives that improve the soil quality, helping plants to grow. The main difference between the two is that manure is all-natural animal droppings while fertilizer may be natural but may also have chemicals and other unknown substances added to it.
As a verb, to harvest something means that you pick or gather it. ... As a noun, harvest means the time of year when crops are ripe and ready to be gathered. The picked crop is also called a harvest: a bumper crop is a plentiful harvest, and a poor harvest is when things didn't grow as well as expected.
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Some differences between fertilizer and manure are:
1. Fertilizer is an inorganic chemical synthesized artificially while manure is a combination of inorganic and organic substances obtained naturally by decomposing cattle excreta, plant litter, and human wastes.
2. Fertilizer can add only a specific nutrient to the soil whereas manure can provide many useful nutrients.
3. A fertilizer cannot add humus to the soil whereas manure can.
Some differences between fertilizer and manure are:
1. Fertilizer is an inorganic chemical synthesized artificially while manure is a combination of inorganic and organic substances obtained naturally by decomposing cattle excreta, plant litter, and human wastes.
2. Fertilizer can add only a specific nutrient to the soil whereas manure can provide many useful nutrients.
3. A fertilizer cannot add humus to the soil whereas manure can.
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