Irrigation

What are the advantages of fertigation in agriculture? 1. Controlling the alkalinity of irrigation water is possible 2. Efficient application is Rock phosphate and all other phosphatic fertilizers is possible. 3. Increased availability of nutrients to plants is possible. 4. Reduction in the reaching of chemical nutrients is possible. Select the correct answer given below using the code given below:

Which of the following practices can help in water conservation in agriculture? 1. Reduced or zero tillage of the land e 2. Applying gypsum before irrigating the field 3. Allowing crop residue to remain in the field Select the correct answer using the code given below :

With reference to micro-irrigation, which of the following statements is/are correct? 1. Fertilizer/nutrient loss can be reduced. 2. It is the only means of irrigation in dry land farming. 3. In some areas of farming, receding of ground water table can be checked. Select the correct answer using the codes given below: