Is having loose soil good for plants? What will happen if the soil is too loose?
Loose soil is good for the plants since the roots of plants can penetrate easily in it. The loose soil also provides oxygen to the roots of plants through aeration. It also helps to bring the nutrient-rich soil to the top so that plants can use the nutrients.
However, if the soil is too loose then it will not be able to hold the roots of plants firmly enough for support and hence the plants may not stay erect and rooted to the soil. Too loose soil means that the water will drain through the soil and will not be available for the plants.
Why do the Governments in some countries impose restrictions on the import of plants? What are the advantages of having these restrictions removed?
Explain the various methods of weeding.
Describe the role of irrigation in improving crop yield. Mention any one effect of it if it is used in excess.
Describe the role of fertilisers in improving crop yield. Mention one adverse effect of excessive use of fertilizers.
