Which of the following statements regarding laterite soils of India are correct?<br/>1. They are generally red in colour.<br/>2. They are rich in nitrogen and potash.<br/>3. They are well-developed in Rajasthan and UP.<br/>4. Tapioca and cashew nuts grow well on these soils.<br/><br/>Select the correct answer using the codes given below:

1. They are generally red in colour — Correct. Laterite soils are typically red to reddish-brown due to iron oxides.

2. They are rich in nitrogen and potash — Incorrect. Laterite soils are generally poor in nitrogen, potash, phosphoric acid and humus because of intense leaching.

3. They are well-developed in Rajasthan and UP — Incorrect. Laterite soils are mainly found in high rainfall areas of the Western Ghats, Eastern Ghats, parts of central India and the Northeast, not Rajasthan and Uttar Pradesh.

4. Tapioca and cashew nuts grow well on these soils — Correct. With suitable management, crops like cashew and tapioca do well on laterite soils.

Hence, statements 1 and 4 are correct.