समोच्च बाँध (Contour bunding) मुख्य रूप से किस प्रकार की भूमि पर मृदा संरक्षण के लिए अपनाया जाता है?

The method of soil conservation in which different crops are grown in alternate rows and sown at different times to protect the soil from rain wash is called:

Which soil conservation and land management technique helps in sand dune stabilization and desert greening?