Consider the following statements regarding different soil types in India:

1. Black soil is poor in calcium carbonate, magnesium, and potassium but rich in phosphorus.

2. Laterite soil is highly fertile and supports intensive agriculture without the need for fertilizers.

3. Arid soil has a high salt content, making it unsuitable for cultivation without irrigation.

4. Red soil gets its color from the presence of ferric oxides and is mainly found in peninsular India.

Which of the above statements are correct?