An agronomist's advice for Ouma's cassava farm in Arusha

I farm 3 hectares of cassava in Arusha. This season I'm dealing with failing irrigation in the dry months. I've tried what the local suppliers recommended, but results aren't improving. I'm looking for an agronomist or experienced grower who can look at photos, soil-test results and my planting plan, and advise on what to change. A 30-minute call or exchange of messages would be fantastic. I'm happy to share photos and a soil test. I'm using only what I can afford, so low-cost suggestions are best. I'll share how it goes - and what worked - to help others in the community. Even a small gift gets used right away and I'll thank you myself.