Fill in the blanks by typing the appropriate management practice, corresponding to the statements given below by typing in. Hint: reseeding, weeding, topping, top dress.
1. is done in a pasture field to avoid competition with the pasture crops for moisture sunlight and nutrients.
2. Farmers are advice to their pasture crops to ensure proper nutrient balance and to add soil nutrients.
3. is done in a field of pasture grass to promote fresh growth especially the production of basal tillers.
4. is done to obtain correct plant population by refilling gaps where pastures have died.