Should I Apply Cow Dung (Organic Manure) On My Egusi Farm - Any Effects?

No. Please don't. You can only if the compost has thoroughly mixed with the soil and is no longer generating heat. Otherwise the heat will kill the roots.

Cow dung is slow acting, so the best time to apply it is before planting. Spread it on the ground before cultivating or tilling. Make sure it's as dry as sand then incorporate it into the soil before planting.

What is the yield of Egusi per acre?

Plant on the side of ridges. One (1m) apart.