(i) Two methods of improving crop yield are:
(1) By the application of inorganic manure or fertilizer - Fertilizer ought to be applied before or after planting to boost the fertility of the soil which would in turn lead to an increase in the crop yield. There are different methods of fertilizer application. Fertilizer can be applied through the method of broadcasting, ring method or through the use of the side placement or filial method. Example of fertilizer is NPK- which contains Nitrogen Phosphorus and potassium. You need to make sure that fertilizer does not come into direct contact with growing crops because it would lead to the death of those crops.
(2) Crop rotation — Crop rotation is another method of improving the fertility of the soil and the yield of the crop planted on it. It is a system of cropping whereby crops are planted on the same piece of land with each crop following the other in a definite sequence during the same planting season. The piece of land may be shared into five plots and different types of crops planted on each of these plots every year in a specific order. To be able to do this effectively, you must make sure that crops that belong to the same family are not permitted to tag along each other in the sequence. Deep rooted crops ought to follow shallow rooted crops and leguminous crops ought to be sowed on the fallow plot in the sequence.
(ii) Methods of food preservation and storage:
(1) Canning — Canning is a method of food storage whereby foods are stored in cans or sealed containers. Before storage, heat treatment is applied to make sure that the food will not be acted upon by microbes and spoil.
(2) Refrigeration — Refrigerator is a good method of food storage because low temperature prevents the growth and spread of micro organisms. Other methods of food storage are:
(3) Drying and salting (4) Pasteurization, (5) Additives, (6) Smoking and (7) Irradiation.
adhixbelly answered the question on April 13, 2018 at 20:35
- Define the term genetics(Solved)
Define the term genetics.
Date posted: April 13, 2018. Answers (1)
- Give the main characteristics of leukemia and anaemia(Solved)
Give the main characteristics of leukemia and anaemia
Date posted: April 13, 2018. Answers (1)
- List one example of invasive species in Kenya under the following stating its scientific name accordingly:
a)An example of a flora.
b)An example of a fauna.(Solved)
List one example of invasive species in Kenya under the following stating its scientific name:
a)An example of a flora.
b)An example of a fauna.
Date posted: April 12, 2018. Answers (1)
- Explain five effects caused by introduction of invasive species in a self regulating ecosystem.(Solved)
Explain five effects caused by introduction of invasive species in a self regulating ecosystem.
Date posted: April 12, 2018. Answers (1)
- Outline twelve intentional release practices that cause introduction of invasive species in an ecosystem.(Solved)
Outline twelve intentional release practices that cause introduction of invasive species in an ecosystem.
Date posted: April 12, 2018. Answers (1)
- Describe briefly the ten per cent rule of the introduction of invasive species in an ecosystem.(Solved)
Describe briefly the ten per cent rule of the introduction of invasive species in an ecosystem.
Date posted: April 12, 2018. Answers (1)
- Define the following terms as used in biology;
a)Feral.
b)Human commensurable.
c)Invasive species.
d)Native.
e)Alien species.(Solved)
Define the following terms as used in biology;
a)Feral.
b)Human commensurable.
c)Invasive species.
d)Native.
e)Alien species.
Date posted: April 12, 2018. Answers (1)
- What osmoregulatory changes would take place in a marine amoeba if it was transferred to a fresh water environment?(Solved)
What osmoregulatory changes would take place in a marine amoeba if it was transferred to a fresh water environment?
Date posted: April 12, 2018. Answers (1)
- Name the specific part of the brain that triggers sweating (Solved)
Name the specific part of the brain that triggers sweating
Date posted: April 12, 2018. Answers (1)
- In an experiment a piece of brain was removed from a rat, it was found that the rat had large fluctuations of body temperature. Suggest the part...(Solved)
In an experiment a piece of brain was removed from a rat, it was found that the rat had large fluctuations of body temperature. Suggest the part of the brain that had been removed.
Date posted: April 12, 2018. Answers (1)
- Name a structure in veins which is not found in other blood vessels that adapts them to their function (Solved)
Name a structure in veins which is not found in other blood vessels that adapts them to their function
Date posted: April 11, 2018. Answers (1)
- Name the cell organelles that would be abundant in white cell destroying pathogens, palisade mesophyll cells and skeletal muscle cells(Solved)
Name the cell organelles that would be abundant in white cell destroying pathogens, palisade mesophyll cells and skeletal muscle cells.
Date posted: April 11, 2018. Answers (1)
- State the importance of diffusion in plants (Solved)
Significance of diffusion to plant life
Date posted: April 10, 2018. Answers (1)
- (a)State four modes of nutrition in plants. (b)Outline the process involved in the light and dark reactions of photosynthesis(Solved)
(a)State four modes of nutrition in plants.
(b)Outline the process involved in the light and dark reactions of photosynthesis
(c)Describe briefly the modifications and mechanism associated with the following habits
i. filter feeding in mosquito larva
ii. parasitic feeding in tapeworm
Date posted: April 10, 2018. Answers (1)
- What is the importance of diffusion to plants and animals?(Solved)
What is the importance of diffusion to plants and animals?
Date posted: April 10, 2018. Answers (1)
- Explain how the following tissues are adapted to provide mechanical support in plants (a) Parenchyma (b) Collenchyma(Solved)
Explain how the following tissues are adapted to provide mechanical support in plants
a) Parenchyma
b) Collenchyma
Date posted: April 10, 2018. Answers (1)
- Explain the difference in the condition of the red blood cell and onion cell after treatment (distilled water)(Solved)
Explain the difference in the condition of the red blood cell and onion cell after treatment (distilled water)
Date posted: April 9, 2018. Answers (1)
- What do you understand PCR to be?(Solved)
What do you understand PCR to be?
Date posted: April 6, 2018. Answers (1)
- State three characteristics of biomarkers(Solved)
State three characteristics of biomarkers.
Date posted: April 6, 2018. Answers (1)
- Define biomarkers?(Solved)
Define biomarkers?
Date posted: April 6, 2018. Answers (1)