कृषि में 'कुदाली' (hoe) का मुख्य रूप से किस उद्देश्य के लिए उपयोग किया जाता है?

Growing different crops in the same field in a pre-planned succession to maintain soil fertility and optimize yield is known as:

In traditional grain storage, farmers often mix grains with neem leaves to prevent:

What is the primary biological agent used to prepare vermicompost?