Citrus Fruit (Question from Melinda)

Problem: Melinda observed very little fruit or flowers on her old citrus trees.

Solution: Given it's the rainy season, Professor Zhang advised applying conventional NPK fertilizer to the soil's drip line for a strong nutritional base. This should be complemented with NOPF applied as a foliar spray on the leaves on sunny days. A crucial reminder: do not spray NOPF during the rain, as the fertilizer will simply be washed off, drastically reducing its efficiency.

Coffee (Question from Dr. Emboko about Razimoa variety)

Problem: Dr. Emboko had a semi-deciduous coffee variety that loses leaves just before a short, 2-3 day flowering period. He needed to know the best timing for foliar NOPF application.

Solution: Professor Zhang provided a precise timing strategy:

1. Spray before the flowers bud (at the initial stage).
2. Skip the 2-3 day peak flowering time to avoid waste.
3. Spray after the flowers are gone and the berry phase begins.
4. Apply NOPF once after each major harvest to help the plant recover essential nutrients.

Napier Grass (Animal Feed)

Problem: A farmer asked when NOPF application should stop for Napier Grass, which is harvested frequently for animal feed.

Solution: Regular fertilization with NOPF is recommended during the active growing phase (monthly or every two to three weeks). However, it's crucial to **stop applying NOPF three weeks to a month before you plan to cut or harvest the grass**. This ensures all nutrients are fully absorbed and utilized by the plant before harvest.

Trouble with Seeds & Germination (Question from MiDC)

Problem: MiDC reported that spinach, carrots, and onion seeds were failing to germinate after planting.

Solution: Professor Zhang explained that this is often a seed viability or moisture issue, rather than a direct soil problem. He recommended two steps:

1. First, check seed viability (e.g., using the simple paper towel germination test).
2. Ensure the soil remains **moist all the time** during the critical germination phase (not waterlogged, but consistently damp). If the soil dries out after germination, tender seedlings will quickly die.

Fig and Peach Trees

Problem: A farmer described fig fruits (marble-sized) dropping with a black dot, and a single peach tree that lost all its flowers and fruit after blooming.

Solution: Professor Zhang identified both issues as abnormal and clarified they are not typical effects of NOPF. The fig fruit dropping with black dots likely indicates an **external factor like a pest or disease**, and the farmer was advised to **open the falling fruit** to investigate further. Similarly, a peach tree losing all flowers/fruit after blooming on only one tree is **abnormal and not caused by NOPF**, suggesting localized environmental stress or another specific issue.