हरी खाद द्वारा मिट्टी में मुख्य रूप से कौन से दो आवश्यक पोषक तत्व जोड़े जाते हैं?

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?